Nutrition Tips for Athletes: An Evidence-Based Guide

Good nutrition tips for athletes start with an unglamorous truth: food is fuel, and the amounts that matter are measured per kilogram of your body, not in percentages or slogans. The Academy of Nutrition and Dietetics, Dietitians of Canada and the American College of Sports Medicine state it plainly: performance and recovery are enhanced by well-chosen nutrition strategies. This guide gives you the evidence-based foundation: enough total food, carbohydrate scaled to training, protein spread through the day, sensible fat, honest hydration guidance, the micronutrients athletes most often miss, and a skeptical look at supplements.

First, Eat Enough

The most common nutrition mistake in athletes is under-eating. Training raises energy needs substantially, and if you consistently eat far less than you burn, training quality drops, recovery slows, and you get sick more often. Match food to training: heavy training days need noticeably more food than rest days.

Carbohydrates: Your Main Fuel

Carbohydrate is the primary fuel for moderate-to-high-intensity exercise. Your muscles and liver store it as glycogen, but those stores are limited, and as they run down, your ability to hold intensity falls with them. That is why carbohydrate needs scale with training volume: for heavy training (roughly 1 to 3 hours of moderate-to-high-intensity exercise per day), guidelines commonly suggest 6 to 10 grams of carbohydrate per kilogram of body weight per day, and the ISSN reports 5 to 12 g/kg/day across training volumes.

For a 70 kg athlete training hard, 6 to 10 g/kg means roughly 420 to 700 grams of carbohydrate per day: that is a lot of food, which is why athletes eat generous portions of grains. Note what changed here: older advice often said carbs should be "50 percent of calories," but the ISSN notes that percentage-based recommendations have fallen out of favor because they cannot prescribe the right amount for very high or very low energy intakes. Grams per kilogram is the honest unit.

Timing matters too. Eat 1 to 4 grams of carbohydrate per kilogram in the hours before hard or long sessions. During exercise lasting beyond about an hour, take in roughly 30 to 60 grams of carbohydrate per hour. After training, refuel with carbohydrate, and combining it with some protein helps recovery. Desi kitchens are well stocked for this: roti, rice, oats, potatoes, bananas and dates are all excellent carbohydrate sources. To portion sensibly, see how many calories are in one roti.

Protein: Build and Repair

Protein builds and repairs muscle; it is not your main fuel. For most exercising individuals, the ISSN considers 1.4 to 2.0 grams of protein per kilogram of body weight per day sufficient for building and maintaining muscle. A 70 kg athlete therefore needs roughly 100 to 140 grams per day, well above the intake of a sedentary person.

Spread it through the day rather than loading it all at dinner: about 0.25 grams per kilogram, or 20 to 40 grams of high-quality protein, every 3 to 4 hours supports muscle protein synthesis best, and a protein-containing meal or snack within about 2 hours after training is a sound habit. Good desi options are eggs, milk and dahi, chicken, fish, and pulses like masoor daal, kala chana and lobia. For the full breakdown, see how much protein you need each day.

A correction: the old version of this article claimed that eating too much protein makes your body store it as fat. That is wrong. What gets stored as body fat is excess energy (calories) from any source, carbohydrate and fat included. In fact, the ISSN notes that higher protein intakes may help reduce fat mass in resistance-trained individuals.

Fats: Needed, Not Feared

Fat is an essential nutrient, not the enemy. Two fatty acids, linoleic acid and alpha-linolenic acid, can only be obtained from the diet, and fat is needed to absorb vitamins A, D, E and K. Sports nutrition guidance typically places athletes around 20 to 35 percent of total calories from fat; dropping far below that makes it hard to meet energy needs and absorb fat-soluble vitamins.

Quality matters more than fear: prefer unsaturated sources such as mustard, canola or sunflower oil and nuts, and keep ghee, butter and deep-fried foods modest. Nobody ever won a match by drowning their food in oil or by banning fat entirely.

Hydration: The Honest Version

The old article claimed that becoming "even a little dehydrated" while active "can be highly deadly." That is hyperbole, and it helps nobody. Here is the honest version: the American College of Sports Medicine's position is that losing more than about 2 percent of body weight as sweat during exercise impairs endurance performance. A 70 kg athlete can therefore lose roughly 1.4 kg of fluid before performance clearly suffers; smaller losses are a normal part of training.

Make it practical:

• Start sessions well hydrated and drink during exercise with the aim of keeping fluid losses under that 2 percent line.
• Learn your own sweat rate by weighing yourself before and after training: each kilogram lost is roughly a liter of fluid.
• After training, drink to replace what you lost; for long or hot sessions, include some salt or an electrolyte drink.
• For sessions under an hour in mild weather, plain water is usually enough.
• More is not always better: aim for a drinking plan that keeps you above that 2 percent floor of loss, not "drink as much as you possibly can."

Iron, Calcium and Vitamin D: The Ones Athletes Miss

Iron carries oxygen in the blood, and correcting iron deficiency anemia improves work capacity. Iron deficiency is one of the most common nutrient deficiencies in the world, and women of reproductive age are among the most affected groups. Athletes who feel unusually fatigued for their training load, especially women and those who eat little meat, should get their iron status checked by a clinician rather than guessing with iron pills, which can cause harm in excess.

Calcium and vitamin D protect bone health: vitamin D promotes calcium absorption in the gut and enables normal bone mineralization. Athletes who train mostly indoors, avoid dairy, or get little sun exposure should pay attention to both. Vitamin D deficiency is widespread in Pakistan even with abundant sunshine, as our vitamin D deficiency in Pakistan guide explains.

The food-first fix covers most of it: daal and chana, leafy greens like palak, eggs, and milk or dahi most days.

Supplements: Be Skeptical

The International Olympic Committee's consensus statement on supplements is sobering: of the thousands of products marketed to athletes, only a few, including caffeine, creatine, specific buffering agents and nitrate, have good evidence of benefit, and even those depend on the sport and the individual. Contamination with prohibited substances is a known risk that has ended careers.

The sensible order is: fix the diet first, consider a supplement only for a specific, evidence-backed reason, trial it in training never in competition, and get expert advice before spending money.

Nutrition Tips for Athletes: A Desi Day of Eating

An illustration for a roughly 70 kg athlete on a hard training day, not a prescription. Adjust portions to your size and training load:

When	What	Why
1 to 2 hours before training	2 bananas or 4 to 5 dates with water	Quick carbohydrate to top up glycogen
Breakfast	Oats in milk with nuts, or a 2-egg omelet with 2 rotis and dahi	Carbohydrate plus morning protein
Lunch	1.5 cups masoor daal or kala chana with 2 to 3 rotis, sabzi and salad	Big carbohydrate and protein refuel
After training	A glass of milk with dates, or dahi with banana	Protein plus carbohydrate within the recovery window
Dinner	Grilled chicken or fish with 2 rotis and palak or mix sabzi	Protein for overnight repair, vegetables for micronutrients

What the Old Article Got Wrong

The old claim	The correction
"According to a recent study, injuries are more common in the last 20-30 minutes of a game"	Removed. No study was cited, and the claim cannot be verified as stated.
"Becoming even a little dehydrated can be highly deadly"	Corrected. Fluid losses above about 2 percent of body weight impair endurance performance (ACSM); "highly deadly" is hyperbole.
"When you eat too much protein, your body stores it as fat"	Corrected. Excess calories from any source are stored as fat; higher protein intakes may actually help reduce fat mass (ISSN).
"Carbohydrates should supply up to 50% of the energy source"	Corrected. Percentage-based guidance has fallen out of favor; scale carbohydrate to training at roughly 6 to 10 g/kg/day for heavy training (ISSN, BJSM).
"Fat is only utilized after one hour of performance"	Corrected. The body burns a mix of carbohydrate and fat throughout exercise; the mix shifts with intensity and duration.
Protein timing and amounts left vague	Specified: 1.4 to 2.0 g/kg/day total, about 20 to 40 g every 3 to 4 hours, with protein within about 2 hours after training (ISSN).

References

1. Jäger R, Kerksick CM, Campbell BI, et al. International Society of Sports Nutrition position stand: protein and exercise. J Int Soc Sports Nutr. 2017;14:20. PMID: 28642676. https://pubmed.ncbi.nlm.nih.gov/28642676/
2. Kerksick CM, Arent S, Schoenfeld BJ, et al. International Society of Sports Nutrition position stand: nutrient timing. J Int Soc Sports Nutr. 2017;14:33. https://link.springer.com/article/10.1186/s12970-017-0189-4?form=MG0AV3
3. Hassapidou M. Carbohydrate requirements of elite athletes. Br J Sports Med. 2011;45(2):e2.17. https://bjsm.bmj.com/content/45/2/e2.17
4. James LJ, et al. Does dehydration really impair endurance performance? Gatorade Sports Science Institute, Sports Science Exchange. https://www.gssiweb.org/sports-science-exchange/article/does-dehydration-really-impair-endurance-performance-recent-methodological-advances-helping-to-clarify-an-old-question
5. National Institutes of Health, Office of Dietary Supplements. Dietary supplements for exercise and athletic performance: health professional fact sheet. https://ods.od.nih.gov/factsheets/exerciseandathleticperformance-healthprofessional/
6. Maughan RJ, Burke LM, Dvorak J, et al. International Olympic Committee consensus statement: dietary supplements and the high-performance athlete. Br J Sports Med. 2018;52(7):439-455. https://bjsm.bmj.com/content/52/7/439
7. National Institutes of Health, Office of Dietary Supplements. Vitamin D: health professional fact sheet. https://ods.od.nih.gov/factsheets/VitaminD-HealthProfessional/
8. Thomas DT, Erdman KA, Burke LM. American College of Sports Medicine joint position statement: nutrition and athletic performance. Med Sci Sports Exerc. 2016;48(3):543-568. PMID: 26891166. https://pubmed.ncbi.nlm.nih.gov/26891166/

Disclaimer: This article is for education only and is not medical advice. Needs differ with age, health conditions, pregnancy and medication. Talk to your healthcare provider or a registered dietitian before major dietary changes, especially with diabetes, heart, kidney or liver disease.