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If you’re in the fitness world, you can’t avoid it: whether in your gym locker room or scrolling on Instagram, it seems that everyone has something to say about nutrition. A favorite topic ... Read more
The post How Many Calories Should I Eat Per Day? A Guide for All Your Fitness Goals appeared first on BarBend.
If you’re in the fitness world, you can’t avoid it: whether in your gym locker room or scrolling on Instagram, it seems that everyone has something to say about nutrition. A favorite topic among bodybuilders and social media influencers alike is how many calories you should eat a day.
Despite the trends you might be tempted to hop on board with, It’s simply energy balance that dictates your weight — energy in versus energy out — along with an array of other factors impacting what food you have access to and how your body processes it.
Credit: asiandelight / Shutterstock
And it’s not just about losing, gaining, or maintaining weight. You can’t feel or perform your best if you aren’t fueling yourself properly. When you know how much energy your body needs, you can make informed decisions about your energy intake in the pursuit of your fitness goals. So, how many calories do you need, and how will you know you’re eating the right amount?
What Are Calories?
Calories are units of energy measurement, in the same way that degrees are units of temperature measurement and centimeters and inches are used to measure distance. (1)
The energy from our food is stored in the chemical bonds between the carbon, hydrogen, oxygen, and nitrogen atoms that make up the macronutrients — carbohydrates, fats, and proteins.
Fats are the most energy-dense macronutrient because they contain nine kilocalories (kcal) per gram, whereas carbs and proteins contain only four kcal per gram. (2)
[Read More: The Best Healthy Fast Food Options at the Most Popular U.S. Chains]
The cells in our bodies use most of the chemical energy from food to form adenosine triphosphate (ATP), which is often referred to as the “energy currency” of the cell since it powers everything from the nervous system to muscular contractions.
Some of the chemical energy is lost as heat, which helps to maintain body temperature, and excess energy is stored for later use in the form of glycogen and body fat. (2)(3)
How to Decide How Many Calories You Should Eat?
Your daily calorie intake needs depend on several factors such as your age, body composition, and physical activity level. Your actual amount of calories you take in is based on your goals — whether you want to lose weight, gain weight, or maintain your current weight.
When you consume fewer calories than your body needs, you enter a calorie deficit, or a state of negative energy balance that may result in (mostly) fat loss. When you consume more than your body needs, some of the excess energy can be used to build muscle mass, and a portion is stored in the form of body fat. (2)(3)
What Burns Calories?
Your body needs a certain amount of energy — or calories — to keep you alive and support your everyday activities. The total amount of energy you require to keep your vital organs functioning, process and absorb nutrients, and engage in physical activities is known as your Total Daily Energy Expenditure (TDEE).
Your TDEE includes three components:
Credit: wavebreakmedia / Shutterstock
[Read More: The Best Foods for Energy Before, During, and After Your Workouts]
So, if you’re aiming to increase your TDEE, you may opt to not just exercise more, but also move more during the day. That might include a 10-minute walk every two hours, taking the stairs instead of an escalator, or hand mixing that dough instead of using a stand mixer.
What Factors Influence Your Daily Calorie Needs?
Everything from age, sleep, and hormonal levels to genetics and environmental factors like access to affordable healthy food impacts how your body processes calories. Your food choices can also influence your calorie needs since they affect your TEF.
Calorie Needs Vary with Age and Stages of Life
BMR is highest (relative to body mass) in infants, but steadily declines until about age 20, where it remains relatively stable for the next 40 years. BMR declines in older adults, but that’s likely due to the loss of muscle mass rather than age. People also tend to become more sedentary with age, so they don’t burn as many calories through physical activity. (3)
It’s important to note that there’s no reason to believe that you have to lose muscle mass as you age. You can work with a nutritionist or another qualified healthcare professional to improve your wellness and activity level if you want to retain muscle mass and strength as you get older.
Credit: Microgen / Shutterstock
[Read More: Nutrition for Athletes — How to Eat for Muscle and Performance]
Both BMR and TDEE are higher during pregnancy and chest or breastfeeding, equating to several hundred additional calories per day. (3)
Calorie Needs Are Relative to Body Size and Muscle Mass
That brings us to the next factors: body size and body composition. All things being equal, people with larger bodies, higher levels of muscle mass, or people with obesity will also have higher BMRs. Fat mass can also contribute to BMR. (3)
[Read More: The 12 Best Supplements for Muscle Growth]
Rapid weight loss can result in adaptive thermogenesis, which reduces BMR, but even with gradual weight loss, a smaller body will have a lower BMR. Genetics can also affect BMR since they influence body composition and mitochondrial function. (3)
Calorie Needs Are Greater in Physically Active People
This one may be obvious, but the more physically active you are, the more energy you need to consume to maintain a healthy weight.
[Read More: 5 At-Home Workouts for Strength, Muscle Growth, Power, and More]
That’s not just because you’re burning more calories through exercise. You may also have a higher TEF than people who are sedentary, so you require more calories to digest and absorb your meals. (3) If you’re seeking guidance about how to balance your calorie consumption and activity factors, consider checking in with a registered dietitian (RDN).
Meal Composition Affects TEF
Protein has the highest TEF of the macronutrients — meaning it takes the most energy to digest — whereas the TEF of carbohydrates and fats is quite low. That doesn’t mean you should reduce or eliminate carb or fat intake to try and manipulate your TEF. Make sure you’re following relevant dietary guidelines to ensure you’re getting enough of all the macronutrients.
Credit: Okrasiuk / Shutterstock
[Read More: The Best Protein Intake Calculator for Muscle Gain and Fat Loss]
There’s also evidence that minimally processed, high-fiber meals result in a higher TEF and more energy being lost in stool. All other factors controlled, a person eating a high-protein, plant-rich dietary pattern would likely have greater calorie needs than someone eating a low-protein, low-fiber diet. (3)(4)
How Many Calories Should You Eat for Performance or Health Goals?
If you’re an athlete or fitness enthusiast, you know that there’s no way to optimize performance when you’re in poor health. Eating too few calories can result in Relative Energy Deficiency in Sport (RED-S) syndrome. (5) RED-S has serious health and performance consequences, including:
[Read More: Omega 3 Benefits — More Muscle, Better Recovery, and Enhanced Endurance]
If you’re a competitive athlete training for two to three hours a day, you’ll likely need upwards of 50 to 80 kcal/kg of body weight per day to prevent RED-S. Elite endurance athletes training for three to six hours a day could need up to 150 kcal/kg of body weight per day! (6)
How Many Calories Should You Eat for Physique Goals?
Many people have purely aesthetic goals, but it’s important to differentiate the approach of a physique athlete from that of a fitness enthusiast.
Physique athletes, like bodybuilders, are judged entirely on aesthetics. A physique athlete may reduce their calories from 2,000 to 3,800 in the off-season to as little as 1,600 (or even less) while preparing for a competition. They sacrifice performance — and, to some extent, health — in pursuit of an exceptionally lean, muscular physique that lasts just a few days. (7)
Some athletes and gymgoers — inspired by social media fitness content — use similarly extreme measures in pursuit of aesthetic goals that they hope to maintain indefinitely, which may be unrealistic and even harmful. In reality, fat loss, muscle gain, and body recomposition can all be achieved with relatively small deviations from your daily calorie needs. (8)
Credit: Skydive Erick / Shutterstock
[Read More: The Definitive Guide to Bodybuilding Meal Prep]
When you’re interested in gaining muscle, you can achieve that by eating 300 kcal/day more than you need to maintain your current weight. (9)(10)
If your goal is losing fat without losing an unnecessary amount of muscle mass, eat up to 500 kcal/day less than you need to maintain your current weight. And if you want to build muscle and spur fat loss somewhat simultaneously, eat what you need to maintain your weight. (9)(10)
Our Calorie Calculator
If you’ve weighed the pros and the cons of tracking calories and decided that it’s the right method for you, check out BarBend’s very own calorie calculator.
Calorie Calculator
Imperial
Metric
Age
Sex
Male
Female
Height
Feet
Meters
Weight
Pounds
Kilograms
Activity Level
Sedentary: little or no exercise
Exercise 1-3 times/week
Exercise 4-5 times/week
Daily exercise or intense exercise 3-4 times/week
Intense exercise 6-7 times/week
Very intense exercise daily, or physical job
BMR estimation formula
No
Yes
Calculate
Your daily calorie needs: Calories Per Day
Daily calorie needs based on goal
Goal
Calories Per Day
Maintenance
Fat Loss
Extreme Fat Loss
Exercise: 15-30 minutes of elevated heart rate activity.
Intense exercise: 45-120 minutes of elevated heart rate activity.
Very intense exercise: 2+ hours of elevated heart rate activity.
jQuery(document).ready(function($) {
$('.calorie_calculator #eq').on('change', function() {
var bfat= $(this).find(":selected").val();
if (bfat == "3") {
$('.calorie_calculator #katch').show();
}else{
$('.calorie_calculator #katch').hide();
}
});
var units_x;
units_x="EN";
$('.calorie_calculator input[name="units"]').click(function() {
var units_v = $(this).val();
if (units_v == "SI") {
$('.calorie_calculator input[name="height-tens"]').attr("placeholder", "Meters");
$('.calorie_calculator input[name="height-units"]').attr("placeholder", "Centimeters");
$('.calorie_calculator input[name="weight"]').attr("placeholder", "Kilograms");
$('.calorie_calculator input[name="height-tens"]').val("");
$('.calorie_calculator input[name="height-units"]').val("");
$('.calorie_calculator input[name="weight"]').val("");
//$('#macros-meters').prop('checked', true);
//$('#macros-feet').prop('checked', false);
units_x="SI";
$("input[id=macros-kilos]").prop("checked",true);
$("input[id=macros-pounds]").prop("checked",false);
}
else if (units_v == "EN") {
$('.calorie_calculator input[name="height-tens"]').attr("placeholder", "Feet");
$('.calorie_calculator input[name="height-units"]').attr("placeholder", "Inches");
$('.calorie_calculator input[name="weight"]').attr("placeholder", "Pounds");
$('.calorie_calculator input[name="height-tens"]').val("");
$('.calorie_calculator input[name="height-units"]').val("");
$('.calorie_calculator input[name="weight"]').val("");
// $("input[id=macros-meters]").prop("checked",false);
// $("input[id=macros-feet]").prop("checked",true);
units_x="EN";
$("input[id=macros-kilos]").prop("checked",false);
$("input[id=macros-pounds]").prop("checked",true);
}
});
//alert(units_x);
$('.calorie_calculator input[name="height-system"]').click(function() {
var heightUnits = $(this).val();
if (heightUnits == "meters") {
$('.calorie_calculator input[name="height-tens"]').attr("placeholder", "Meters");
$('.calorie_calculator input[name="height-units"]').attr("placeholder", "Centimeters");
$('.calorie_calculator input[name="height-tens"]').val("");
$('.calorie_calculator input[name="height-units"]').val("");
}
else if (heightUnits == "feet") {
$('.calorie_calculator input[name="height-tens"]').attr("placeholder", "Feet");
$('.calorie_calculator input[name="height-units"]').attr("placeholder", "Inches");
$('.calorie_calculator input[name="height-tens"]').val("");
$('.calorie_calculator input[name="height-units"]').val("");
}
});
$('.calorie_calculator input[name="weight-system"]').click(function() {
var weightUnits = $(this).val();
if (weightUnits == "kilos") {
$('.calorie_calculator input[name="weight"]').attr("placeholder", "Kilograms");
$('.calorie_calculator input[name="weight"]').val("");
}
else if (weightUnits == "pounds") {
$('.calorie_calculator input[name="weight"]').attr("placeholder", "Pounds");
$('.calorie_calculator input[name="weight"]').val("");
}
});
$('.calorie_calculator .calc-submit').click(function() {
var height = 0;
var calories = 0;
var katch = $("input[name='katch']").val();
if(katch==""){katch=20;}
katch = katch/100;
var eq = $('.calorie_calculator #eq option:selected').val();
var heightTens = parseInt($('.calorie_calculator input[name="height-tens"]').val());
var heightUnits= parseInt($('.calorie_calculator input[name="height-units"]').val());
var heightType = $('.calorie_calculator input[name="height-system"]:checked').val();
var heightTypex = parseInt($('.calorie_calculator input[name="heightTypex"]').val());
var weight = parseInt($('.calorie_calculator input[name="weight"]').val());
var weightType = $('.calorie_calculator input[name="weight-system"]:checked').val();
var age = parseInt($('.calorie_calculator input[name=age]').val());
var sex = $('.calorie_calculator input[name=sex]:checked').val();
var job = $('.calorie_calculator input[name=activity]:checked').val();
var bmr = '';
if (isNaN(age) || isNaN(heightTens) || isNaN(weight)) {
$('.calorie_calculator .calc-answer').show(0).html('Please enter values for all the fields.').addClass('bb_cal_error').one('webkitAnimationEnd mozAnimationEnd MSAnimationEnd oanimationend animationend', function() {
$(this).removeClass('bb_cal_error');
});
$('html, body').animate({scrollTop: $(".calc-header").offset().top-150}, 1000);
$('.calorie_calculator #cal_result').hide();
$('.calorie_calculator .ca_result .rs').html('');
}
else {
if(isNaN(heightUnits)) {
heightUnits = 0;
}
//alert('heightType:'+units_x);
if (units_x == "EN") {
height = ((heightTens * 30.48) + (heightUnits * 2.54));
}
else {
height = (heightTens * 100) + heightUnits;
}
if (units_x == "EN") {
weight = (weight * 0.453592);
}
if (sex == "M") {
if (eq == "1") {
bmr = Math.round(88.362 + (weight * 13.397) + (height * 4.799) - (age * 5.677));
}else if (eq == "2"){
bmr = Math.round(5 + (weight * 10) + (height * 6.25) - (age * 5));
}else if (eq == "3"){
// bmr = Math.round(weight*(100-(20)))/100);
bmr = Math.round(370+21.6*(1-katch)*weight);
}
}
else {
if (eq == "1") {
bmr = Math.round(447.593 + (weight * 9.247) + (height * 3.098) - (age * 4.330));
}else if (eq == "2"){
bmr = Math.round((weight * 10) + (height * 6.25) - (age * 5));
bmr = (bmr - 161);
}else if (eq == "3"){
bmr = Math.round(370+21.6*(1-katch)*weight);
}
}
switch (job) {
case "a1":
calories = Math.round(bmr * 1.2);
break;
case "a2":
calories = Math.round(bmr * 1.375);
break;
case "a3":
calories = Math.round(bmr * 1.466);
break;
case "a4":
calories = Math.round(bmr * 1.55);
break;
case "a5":
calories = Math.round(bmr * 1.725);
break;
case "a6":
calories = Math.round(bmr * 1.9);
break;
}
$('.calorie_calculator #cal_result').show();
$('.calorie_calculator .d_calorie_result').html(calories);
$('.calorie_calculator .maint_result').html(calories);
$('.calorie_calculator .fat_result').html(Math.round(calories/1.25));
$('.calorie_calculator .efat_result').html(Math.round(calories/1.67));
$('html, body').animate({scrollTop: $("#cal_result").offset().top-150}, 1000);
$('.calorie_calculator .calc-answer').html('');
}
});
});
#bb_cal_ui .calc-header {
border-bottom: 2px solid #8cc540;
padding: 5px 0 !important;
font-size: 36px;
font-weight: 700;
margin: 34px 0 30px 0px !important;
}
#cal_result .bmrtable, #cal_result .bmrtable td, #cal_result .bmrtable tr, #cal_result .bmrtable th{
border: 0px;
padding: 8px 2px;
}
#cal_result .bmrtable td{
border-bottom: 1px solid #ccc;
}
#cal_result .bmrtable th{
border-bottom: 2px solid #92c663;
}
.bmr_result_align{text-align:center; font-weight:600;}
#bb_cal_ui {
box-shadow: 0px 0px 10px 0px rgba(0,0,0,0.09);
transition: background 0.3s, border 0.3s, border-radius 0.3s, box-shadow 0.3s;
margin: 0px;
padding: 18px 20px 20px 20px;
}
.calc-label span{display:none!important;}
div#bb_cal_ui .hidenow{
display:none;
}
div#bb_cal_ui .cals-and-calorie_calculator h2.calc-header {
background: #232323;
border: solid 1px #232323;
border-bottom: none;
border-radius: 3px 0px;
color: #ffffff !important;
margin: 0 !important;
padding: 15px;
}
.cals-and-calorie_calculator .calc-container {
border: solid 1px #cccccc;
border-top: solid 1px #ffffff;
border-radius: 0 3px;
padding: 10px;
}
.cals-and-calorie_calculator .calc-subheader {
display: block;
font-family: ProximaNovaExCnSemiBold;
font-size: 20px;
font-size: 2rem;
margin-top: 10px;
text-transform: uppercase;
}
.cals-and-calorie_calculator .calc-row {
margin-bottom: 5px;
}
div#bb_cal_ui .cals-and-calorie_calculator input.calc-textbox {
box-sizing: border-box;
height: auto;
line-height: inherit;
padding: 12px;
width: 100%;
}
div#bb_cal_ui .cals-and-calorie_calculator input.calc-textbox-half {
box-sizing: border-box;
height: auto;
line-height: inherit;
padding: 12px;
width: 49.5%;
}
div#bb_cal_ui input.calc-textbox-halfd, div#bb_cal_ui select.calc-textbox-halfd {
box-sizing: border-box;
height: auto;
line-height: inherit;
padding: 4px 15px;
width: 48.5%!important;
font-weight: 500;
background: #fff;
color: #000;
font-size: 17px;
}
@media (max-width: 768px) {
div#bb_cal_ui input.calc-textbox-halfd, div#bb_cal_ui select.calc-textbox-halfd {
width: 100% !important;
}
.calorie_calculator{margin:0px !important;}
#bb_cal_ui h3 {font-size: 20px;}
#bb_cal_ui .calc-header {
padding: 5px 0 !important;
font-size: 22px;
margin: 10px 0 25px 0px !important;
}
}
.cals-and-calorie_calculator .calc-float-right {
float: right;
}
.cals-and-calorie_calculator .calc-row input[type=radio] {
display: none;
}
.cals-and-calorie_calculator .calc-row input[type=radio] + label span {
background: url('/images/bgsprite.png') no-repeat -75px -1250px;
cursor: pointer;
display: inline-block;
height: 23px;
margin: 2px 5px 5px 6px;
vertical-align: middle;
width: 21px;
}
.cals-and-calorie_calculator .calc-row input[type=radio]:checked + label span {
background: url('/images/bgsprite.png') no-repeat -50px -1250px;
}
.cals-and-calorie_calculator .calc-row input[type=radio]:checked + label {
background-color: #f4f4f4;
}
.cals-and-calorie_calculator .calc-label {
border: solid 1px #5a5a5a;
border-radius: 3px;
cursor: pointer;
display: inline-block;
font-size: 14px;
font-size: 1.4rem;
font-weight: bold;
padding: 6px;
width: 100%;
}
.cals-and-calorie_calculator .calc-label-small {
border: solid 1px #5a5a5a;
border-radius: 3px;
cursor: pointer;
display: inline-block;
font-size: 14px;
font-size: 1.4rem;
font-weight: bold;
padding: 6px;
width: 49.5%;
}
.cals-and-calorie_calculator .calc-label:hover {
background-color: #f4f4f4;
}
.cals-and-calorie_calculator .calc-answer {
display: none;
}
#bb_cal_ui h3:after {
content: "";
display: block;
width: 100px;
padding: 0px 0;
border-bottom: 0px solid #8cc540;
}
#bb_cal_ui .calc-container{
padding:0px;
}
#bb_cal_ui .g-heading {
display: -webkit-box;
display: -webkit-flex;
display: -ms-flexbox;
display: flex;
margin-bottom: 0;
padding: 0;
-webkit-box-pack: justify;
-webkit-justify-content: space-between;
-ms-flex-pack: justify;
justify-content: space-between;
-webkit-box-align: center;
-webkit-align-items: center;
-ms-flex-align: center;
align-items: center;
float:right;
}
#bb_cal_ui .form-heading {
-webkit-box-flex: 1;
-webkit-flex: 1 0 auto;
-ms-flex: 1 0 auto;
flex: 1 0 auto;
}
#bb_cal_ui h3 {
font-size: 24px;
}
#bb_cal_ui h3, .tool-heading {
margin: 0 0 8px;
padding: 0;
}
#bb_cal_ui .radio-toggle {
font-size: 0;
}
#bb_cal_ui .radio-toggle input[type=radio] {
position: absolute;
visibility: hidden;
}
#bb_cal_ui .radio-toggle input[type=radio]:checked+label {
background-color: #15131D;
}
#bb_cal_ui .radio-toggle input[type=radio]:checked+label {
color: #fff;
}
#bb_cal_ui .radio-toggle input[type=radio]+label {
background-color: #fff;
color: #777;
}
#bb_cal_ui .radio-toggle label:last-of-type {
border-radius: 0;
border-left: none;
}
#bb_cal_ui .radio-toggle label {
font-size: 1rem;
padding: 5px 14px;
border: 1px solid #DADADA;
}
#bb_cal_ui .btn {
display: inline-block;
border: 0;
padding: 1em;
background: #E25F2F;
color: #fff;
line-height: 1;
text-align: center;
-webkit-transition: all .15s ease-out;
transition: all .15s ease-out;
}
#bb_cal_ui .btn, .clickable, #bb_cal_ui .menu-button, #bb_cal_ui .select select, #bb_cal_ui button, #bb_cal_ui input[type=button], #bb_cal_ui input[type=file], #bb_cal_ui input[type=submit], #bb_cal_ui label {
cursor: pointer;
}
.calc-note {
margin: 10px 0 40px 0;
}
div#bb_cal_ui .macros-slider-calculator h2.calc-header {
background: #232323;
border: solid 1px #232323;
border-bottom: none;
border-radius: 3px 0px;
color: #ffffff !important;
margin: 0 !important;
padding: 15px;
}
.macros-slider-calculator .calc-container {
border: solid 1px #cccccc;
border-top: solid 1px #ffffff;
border-radius: 0 3px;
padding: 10px;
}
.macros-slider-calculator .calc-subheader {
display: block;
font-family: ProximaNovaExCnSemiBold;
font-size: 20px;
font-size: 2rem;
margin-top: 10px;
text-transform: uppercase;
}
.macros-slider-calculator .calc-row {
margin-bottom: 5px;
}
.macros-slider-calculator .calc-row-half {
display: inline-block;
vertical-align: top;
width: 49.5%;
}
.macros-slider-calculator .float-right {
float: right;
}
div#bb_cal_ui .macros-slider-calculator input.calc-textbox {
box-sizing: border-box;
height: auto;
line-height: inherit;
padding: 12px;
width: 100%;
}
div#bb_cal_ui .macros-slider-calculator input.calc-textbox-half {
box-sizing: border-box;
height: auto;
line-height: inherit;
padding: 12px;
width: 49.5%;
}
.macros-slider-calculator .calc-dropdown {
height: 46px;
vertical-align: top;
width: 100%;
border-radius: 3px;
font-size: 16px;
}
.macros-slider-calculator .calc-answer {
display: none;
}
.calorie_calculator .calc-container{
margin: 0px;
}
.calorie_calculator{
margin: 15px;
}
.calorie_calculator .calc-subheader, .calc-subheader {
display: block;
margin: 25px 2px 8px 2px;
font-weight: 600;
}
.calorie_calculator .calc-row {
margin-bottom: 5px;
}
div#bb_cal_ui .calorie_calculator input.calc-textbox {
box-sizing: border-box;
height: auto;
line-height: inherit;
padding: 4px 15px;
width: 100%;
background:#fff;
color:#000;
font-size: 17px;
}
div#bb_cal_ui .calorie_calculator input.calc-textbox-half, div#bb_cal_ui input.calc-textbox-half {
box-sizing: border-box;
height: auto;
line-height: inherit;
padding: 4px 15px;
width: 48.5%;
font-weight: 500;
background:#fff;
color:#000;
font-size:17px;
}
.calorie_calculator .calc-float-right {
float: right;
}
.calorie_calculator .calc-row input[type=radio] {
display: none;
}
.calorie_calculator .calc-row input[type=radio] + label span {
background: url('/images/bgsprite.png') no-repeat -75px -1250px;
cursor: pointer;
display: inline-block;
height: 23px;
margin: 2px 5px 5px 6px;
vertical-align: middle;
width: 21px;
}
.calorie_calculator .calc-row input[type=radio]:checked + label span {
background: url('/images/bgsprite.png') no-repeat -50px -1250px;
}
.calorie_calculator .calc-row input[type=radio]:checked + label {
background-color: #8cc53f;
}
.calorie_calculator .calc-label, .calc-label {
border: solid 1px #cccccc;
cursor: pointer;
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The post How Many Calories Should I Eat Per Day? A Guide for All Your Fitness Goals appeared first on BarBend.
If you’re in the fitness world, you can’t avoid it: whether in your gym locker room or scrolling on Instagram, it seems that everyone has something to say about nutrition. A favorite topic among bodybuilders and social media influencers alike is how many calories you should eat a day.
Despite the trends you might be tempted to hop on board with, It’s simply energy balance that dictates your weight — energy in versus energy out — along with an array of other factors impacting what food you have access to and how your body processes it.
Credit: asiandelight / ShutterstockAnd it’s not just about losing, gaining, or maintaining weight. You can’t feel or perform your best if you aren’t fueling yourself properly. When you know how much energy your body needs, you can make informed decisions about your energy intake in the pursuit of your fitness goals. So, how many calories do you need, and how will you know you’re eating the right amount?
- What Are Calories?
- How to Decide How Many Calories You Should Eat?
- How Many Calories Should You Eat for Performance or Health Goals?
- How Many Calories Should You Eat for Physique Goals?
- Our Calorie Calculator
- Frequently Asked Questions
What Are Calories?
Calories are units of energy measurement, in the same way that degrees are units of temperature measurement and centimeters and inches are used to measure distance. (1)
The energy from our food is stored in the chemical bonds between the carbon, hydrogen, oxygen, and nitrogen atoms that make up the macronutrients — carbohydrates, fats, and proteins.
Fats are the most energy-dense macronutrient because they contain nine kilocalories (kcal) per gram, whereas carbs and proteins contain only four kcal per gram. (2)
[Read More: The Best Healthy Fast Food Options at the Most Popular U.S. Chains]
The cells in our bodies use most of the chemical energy from food to form adenosine triphosphate (ATP), which is often referred to as the “energy currency” of the cell since it powers everything from the nervous system to muscular contractions.
Some of the chemical energy is lost as heat, which helps to maintain body temperature, and excess energy is stored for later use in the form of glycogen and body fat. (2)(3)
How to Decide How Many Calories You Should Eat?
Your daily calorie intake needs depend on several factors such as your age, body composition, and physical activity level. Your actual amount of calories you take in is based on your goals — whether you want to lose weight, gain weight, or maintain your current weight.
When you consume fewer calories than your body needs, you enter a calorie deficit, or a state of negative energy balance that may result in (mostly) fat loss. When you consume more than your body needs, some of the excess energy can be used to build muscle mass, and a portion is stored in the form of body fat. (2)(3)
What Burns Calories?
Your body needs a certain amount of energy — or calories — to keep you alive and support your everyday activities. The total amount of energy you require to keep your vital organs functioning, process and absorb nutrients, and engage in physical activities is known as your Total Daily Energy Expenditure (TDEE).
Your TDEE includes three components:
- Basal Metabolic Rate (BMR): This represents the calories your body needs to carry out essential functions, such as breathing and maintaining body temperature, without any physical activity.
- Thermic Effect of Food (TEF): TEF accounts for the calories your body spends to digest and absorb nutrients from the food you eat.
- Physical Activity: This category includes all types of movement, ranging from everyday activities like getting out of bed to more structured exercise routines at the gym. Included in this category is NEAT — non-exercise activity thermogenesis, which involves activities like walking around your house, fidgeting, and doing the dishes. You also have EAT — exercise activity thermogenesis, which refers to intentional, structured exercises like treadmill running, lifting weights, and cycling.
Credit: wavebreakmedia / Shutterstock[Read More: The Best Foods for Energy Before, During, and After Your Workouts]
So, if you’re aiming to increase your TDEE, you may opt to not just exercise more, but also move more during the day. That might include a 10-minute walk every two hours, taking the stairs instead of an escalator, or hand mixing that dough instead of using a stand mixer.
What Factors Influence Your Daily Calorie Needs?
Everything from age, sleep, and hormonal levels to genetics and environmental factors like access to affordable healthy food impacts how your body processes calories. Your food choices can also influence your calorie needs since they affect your TEF.
Calorie Needs Vary with Age and Stages of Life
BMR is highest (relative to body mass) in infants, but steadily declines until about age 20, where it remains relatively stable for the next 40 years. BMR declines in older adults, but that’s likely due to the loss of muscle mass rather than age. People also tend to become more sedentary with age, so they don’t burn as many calories through physical activity. (3)
It’s important to note that there’s no reason to believe that you have to lose muscle mass as you age. You can work with a nutritionist or another qualified healthcare professional to improve your wellness and activity level if you want to retain muscle mass and strength as you get older.
Credit: Microgen / Shutterstock[Read More: Nutrition for Athletes — How to Eat for Muscle and Performance]
Both BMR and TDEE are higher during pregnancy and chest or breastfeeding, equating to several hundred additional calories per day. (3)
Calorie Needs Are Relative to Body Size and Muscle Mass
That brings us to the next factors: body size and body composition. All things being equal, people with larger bodies, higher levels of muscle mass, or people with obesity will also have higher BMRs. Fat mass can also contribute to BMR. (3)
[Read More: The 12 Best Supplements for Muscle Growth]
Rapid weight loss can result in adaptive thermogenesis, which reduces BMR, but even with gradual weight loss, a smaller body will have a lower BMR. Genetics can also affect BMR since they influence body composition and mitochondrial function. (3)
Calorie Needs Are Greater in Physically Active People
This one may be obvious, but the more physically active you are, the more energy you need to consume to maintain a healthy weight.
[Read More: 5 At-Home Workouts for Strength, Muscle Growth, Power, and More]
That’s not just because you’re burning more calories through exercise. You may also have a higher TEF than people who are sedentary, so you require more calories to digest and absorb your meals. (3) If you’re seeking guidance about how to balance your calorie consumption and activity factors, consider checking in with a registered dietitian (RDN).
Meal Composition Affects TEF
Protein has the highest TEF of the macronutrients — meaning it takes the most energy to digest — whereas the TEF of carbohydrates and fats is quite low. That doesn’t mean you should reduce or eliminate carb or fat intake to try and manipulate your TEF. Make sure you’re following relevant dietary guidelines to ensure you’re getting enough of all the macronutrients.
Credit: Okrasiuk / Shutterstock[Read More: The Best Protein Intake Calculator for Muscle Gain and Fat Loss]
There’s also evidence that minimally processed, high-fiber meals result in a higher TEF and more energy being lost in stool. All other factors controlled, a person eating a high-protein, plant-rich dietary pattern would likely have greater calorie needs than someone eating a low-protein, low-fiber diet. (3)(4)
How Many Calories Should You Eat for Performance or Health Goals?
If you’re an athlete or fitness enthusiast, you know that there’s no way to optimize performance when you’re in poor health. Eating too few calories can result in Relative Energy Deficiency in Sport (RED-S) syndrome. (5) RED-S has serious health and performance consequences, including:
- Impaired immunity, protein synthesis, cardiovascular health, and menstrual function
- Increased risk of illness, injury, and stress fractures
- Inability to recover and respond to training stimuli
- Psychological distress, difficulty concentrating, and lack of coordination
[Read More: Omega 3 Benefits — More Muscle, Better Recovery, and Enhanced Endurance]
If you’re a competitive athlete training for two to three hours a day, you’ll likely need upwards of 50 to 80 kcal/kg of body weight per day to prevent RED-S. Elite endurance athletes training for three to six hours a day could need up to 150 kcal/kg of body weight per day! (6)
How Many Calories Should You Eat for Physique Goals?
Many people have purely aesthetic goals, but it’s important to differentiate the approach of a physique athlete from that of a fitness enthusiast.
Physique athletes, like bodybuilders, are judged entirely on aesthetics. A physique athlete may reduce their calories from 2,000 to 3,800 in the off-season to as little as 1,600 (or even less) while preparing for a competition. They sacrifice performance — and, to some extent, health — in pursuit of an exceptionally lean, muscular physique that lasts just a few days. (7)
Some athletes and gymgoers — inspired by social media fitness content — use similarly extreme measures in pursuit of aesthetic goals that they hope to maintain indefinitely, which may be unrealistic and even harmful. In reality, fat loss, muscle gain, and body recomposition can all be achieved with relatively small deviations from your daily calorie needs. (8)
Credit: Skydive Erick / Shutterstock[Read More: The Definitive Guide to Bodybuilding Meal Prep]
When you’re interested in gaining muscle, you can achieve that by eating 300 kcal/day more than you need to maintain your current weight. (9)(10)
If your goal is losing fat without losing an unnecessary amount of muscle mass, eat up to 500 kcal/day less than you need to maintain your current weight. And if you want to build muscle and spur fat loss somewhat simultaneously, eat what you need to maintain your weight. (9)(10)
Our Calorie Calculator
If you’ve weighed the pros and the cons of tracking calories and decided that it’s the right method for you, check out BarBend’s very own calorie calculator.
Calorie Calculator
Imperial
Metric
Age
Sex
Male
Female
Height
Feet
Meters
Weight
Pounds
Kilograms
Activity Level
Sedentary: little or no exercise
Exercise 1-3 times/week
Exercise 4-5 times/week
Daily exercise or intense exercise 3-4 times/week
Intense exercise 6-7 times/week
Very intense exercise daily, or physical job
BMR estimation formula
No
Yes
Calculate
Your daily calorie needs: Calories Per Day
Daily calorie needs based on goal
Goal
Calories Per Day
Maintenance
Fat Loss
Extreme Fat Loss
Exercise: 15-30 minutes of elevated heart rate activity.
Intense exercise: 45-120 minutes of elevated heart rate activity.
Very intense exercise: 2+ hours of elevated heart rate activity.
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var bfat= $(this).find(":selected").val();
if (bfat == "3") {
$('.calorie_calculator #katch').show();
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if (heightUnits == "meters") {
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$('.calorie_calculator input[name="height-units"]').val("");
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$('.calorie_calculator input[name="height-tens"]').attr("placeholder", "Feet");
$('.calorie_calculator input[name="height-units"]').attr("placeholder", "Inches");
$('.calorie_calculator input[name="height-tens"]').val("");
$('.calorie_calculator input[name="height-units"]').val("");
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if (weightUnits == "kilos") {
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$('.calorie_calculator input[name="weight"]').val("");
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var height = 0;
var calories = 0;
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var job = $('.calorie_calculator input[name=activity]:checked').val();
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weight = (weight * 0.453592);
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font-weight: 600;
}
.calorie_calculator .calc-row {
margin-bottom: 5px;
}
div#bb_cal_ui .calorie_calculator input.calc-textbox {
box-sizing: border-box;
height: auto;
line-height: inherit;
padding: 4px 15px;
width: 100%;
background:#fff;
color:#000;
font-size: 17px;
}
div#bb_cal_ui .calorie_calculator input.calc-textbox-half, div#bb_cal_ui input.calc-textbox-half {
box-sizing: border-box;
height: auto;
line-height: inherit;
padding: 4px 15px;
width: 48.5%;
font-weight: 500;
background:#fff;
color:#000;
font-size:17px;
}
.calorie_calculator .calc-float-right {
float: right;
}
.calorie_calculator .calc-row input[type=radio] {
display: none;
}
.calorie_calculator .calc-row input[type=radio] + label span {
background: url('/images/bgsprite.png') no-repeat -75px -1250px;
cursor: pointer;
display: inline-block;
height: 23px;
margin: 2px 5px 5px 6px;
vertical-align: middle;
width: 21px;
}
.calorie_calculator .calc-row input[type=radio]:checked + label span {
background: url('/images/bgsprite.png') no-repeat -50px -1250px;
}
.calorie_calculator .calc-row input[type=radio]:checked + label {
background-color: #8cc53f;
}
.calorie_calculator .calc-label, .calc-label {
border: solid 1px #cccccc;
cursor: pointer;
display: inline-block;
font-size: 14px;
font-weight: 600;
width: 100%;
padding: 6.5px 15px;
}
.calorie_calculator .calc-label-small, .calc-label-small {
border: solid 1px #cccccc;
cursor: pointer;
display: inline-block;
font-size: 14px;
font-weight: 600;
width: 100%;
padding: 6.5px 15px;
}
.calorie_calculator .calc-label:hover {
background-color: #f4f4f4;
}
.calorie_calculator .calc-answer {
display: none;
}
#cal_result {
padding: 25px 0px;
}
#keto_cal_form, #cal_result {
margin: 0 auto;
}
.keto_cal_form_block .keto_cal_form_row,...
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