What the Research Says, and Who This is For
Who this is for: anyone lifting three or more times a week with a strength goal in mind. If you train mostly for general health, the protein numbers below may be higher than you need.
What we looked at: Nine peer-reviewed sources, listed at the end of this blog. A meta-analysis of protein supplementation and resistance-training gains, a review of protein distribution across meals, the 2023 IOC consensus statement on Relative Energy Deficiency in Sport, an early threshold study included as background on energy availability, a joint position stand on nutrition and athletic performance, two reviews of carbohydrate for training and competition, the International Society of Sports Nutrition position stand on protein and exercise, and a narrative review of athletes’ nutritional requirements.
The takeaway:
Three things form a practical nutrition baseline for resistance training: protein, total energy, and carbohydrate. Each has a useful range, not one number that works for everyone. Protein research on lifters training for strength points to roughly 1.6 to 2.2 grams per kilogram of bodyweight a day. Total energy provides the context: if training increases while intake stays the same or falls, recovery and training quality may be affected. Carbohydrate needs also tend to rise with training volume and intensity. These ranges are not a prescription. They help you decide what to look at in your own data when progress stalls.
Your Baseline Moves.
Nutrition advice usually talks about upper limits, the point where more of something stops helping. Those are easy to write about because the number doesn’t change. Your baseline is different, because it isn’t a number you set once. It moves with your bodyweight and with how much work you’re doing.
One possible source of a plateau is a mismatch between what your training asks for and what your usual intake provides. If your bodyweight changes, your grams-per-kilogram protein number changes with it. If you add sessions, sets, or harder work, your total energy and carbohydrate needs may also change. Your meals may not change at the same time. Hunger can tell you that you want more food, but it cannot show which part of the baseline shifted. That is where a consistent stretch of data becomes useful.
The useful question is not only, “Am I eating healthy?” It is also, “How does what I ate compare with the training I did this week?”
Baseline One: Protein Against Training Load
A note on order: these three run in the order most people think about them, starting with protein. Physiologically, total energy comes first, because it limits what the other two can do. That’s covered in Baseline Two and again at the end.
What it does: protein gives your body the amino acids it uses to repair and rebuild muscle after training. Training creates the damage that needs repairing. Protein is what your body repairs it with. If protein is short, the training still happens but the rebuilding it’s supposed to trigger is limited. [5]
The number: a 2018 meta-analysis that pooled resistance-training studies (Morton et al., 2018) found that eating more protein kept adding muscle and strength up to about 1.6 grams per kilogram of bodyweight a day. Past that point, more protein stopped adding much. Some people keep benefiting up to about 2.2 g/kg. Above that, the extra protein didn’t add muscle or strength. [1] (https://doi.org/10.1136/bjsports-2017-097608) Everyone in those studies was lifting regularly with a strength goal. What you need shifts with the kind of training you do and how long your sessions are, so there isn’t one number that fits everyone. [8]
These numbers do not sound complicated, which is part of why they are easy to skip past. If you weigh 70 kg, 1.6 g/kg is 112 grams a day. The useful check is your average across consistently logged days, not how one day felt. A day that feels high in protein is not always a day that reached 112 grams. If your bodyweight changes, the gram amount at the same g/kg benchmark changes too. If your training load changes, the range may also deserve another look.
How this compares: 1.6 g/kg is a strength-training number, not a general one. An adult who is not training needs about 0.8 grams per kilogram a day. [5] Athlete guidance is higher. The joint Academy of Nutrition and Dietetics, Dietitians of Canada and ACSM position stand says 1.2 to 2.0 g/kg, depending on the sport and training phase. [5] The International Society of Sports Nutrition says 1.4 to 2.0 g/kg for people who exercise regularly. [9] The 1.6 to 2.2 g/kg range comes from resistance-training research. [1][8] If you lift mainly for general health, the lower part of the athlete range may be the more relevant comparison. Your health, goals, and overall diet still matter.
Then there’s timing. Muscle repair responds to a reasonable amount of protein in one sitting, about 20 to 25 grams for most people. Eating double that in a single meal doesn’t double the effect. Four meals at about 0.4 g/kg each gets you to 1.6 g/kg. At 70 kg that’s 28 grams a meal. [2] Your daily total comes first. Timing only matters once you’re hitting it. A 70 kg lifter eating 1.1 g/kg gets 77 grams against a baseline of 112. That’s 35 grams short every day, and rearranging meals won’t make up the gap.
Bodyweight | 1.6 g/kg per day | 2.2 g/kg per day | Per meal (4 meals) |
60 kg (132 lb) | 96 g | 132 g | 24 g |
70 kg (154 lb) | 112 g | 154 g | 28 g |
80 kg (176 lb) | 128 g | 176 g | 32 g |
90 kg (198 lb) | 144 g | 198 g | 36 g |
100 kg (220 lb) | 160 g | 220 g | 40 g |
Baseline Two: Total Energy and Training Demand
Total energy is the context for the other two baselines. Your body uses energy for training and recovery as well as everyday functions. When intake repeatedly falls short of the work you are doing, there may be less energy available to support recovery and adaptation. [3][5]
Energy availability is a research term for dietary energy left after exercise, relative to fat-free mass. It is not the same as calories eaten, the number shown as remaining in an app, or a single day’s energy balance. Researchers use formal calculations to study it, but most people do not need to turn it into a personal threshold. The IOC’s 2023 consensus statement on Relative Energy Deficiency in Sport provides the deeper research context. (https://doi.org/10.1136/bjsports-2023-106994) Early threshold research was based on a short, controlled study in regularly menstruating women, so it is better treated as research context than as a universal personal cutoff. [4]
The more practical question is whether your intake has kept pace with your training over time. A planned deficit does not automatically mean you are under-fueled, and there is no single deficit size that fits every person or every training phase. Duration, training load, recovery, health, and goals all matter.
Look for a repeated pattern rather than a precise cutoff:
Did you add sessions, sets, or harder work while average intake stayed the same or fell?
Do your hardest weeks also contain your largest or most consistent gaps between energy consumed and energy burned?
Have training quality, recovery, sleep, or mood changed during the same period?
Cronometer’s Energy Summary can show estimated energy consumed, energy burned, and either your target or energy balance. These numbers are estimates, not a diagnosis. Their value is in helping you compare similar stretches of training using the same settings and logging habits.
This pattern can be easy to miss when eating less intentionally. If training volume rises at the same time, the gap between intake and demand can widen without an obvious change to your meals. More protein alone may not solve a broader shortage of total energy. If you are intentionally losing weight during a demanding training phase, or if performance and recovery stay poor, a sports dietitian can help you choose an approach that fits your needs.
Baseline Three: Carbohydrate and Glycogen
Glycogen is carbohydrate stored in your muscles and liver, and it’s the first fuel your body uses when exercise gets intense. Someone who trains regularly holds about 300 to 600 grams of it at a time. [6] For the deeper read on carbohydrate and glycogen in training, the joint Academy of Nutrition and Dietetics / Dietitians of Canada / ACSM position stand is the standard reference (https://doi.org/10.1016/j.jand.2015.12.006), and Cronometer’s Macronutrient Breakdown shows your carbohydrate intake against your target each day (https://support.cronometer.com/hc/en-us/articles/31119712060308-Macronutrient-Breakdown). Full glycogen stores are what let you repeat a hard set, and restocking them between sessions is a large part of recovery. [5]
When glycogen is lower, repeated high-intensity work may become harder to sustain. [5] That makes recent carbohydrate intake one reasonable place to look when familiar loads repeatedly feel harder than expected.
A low-carbohydrate day does not always line up neatly with a difficult session. Glycogen reflects both recent intake and recent training, so it is useful to review the day or two before a hard workout instead of looking only at the workout day.
Carbohydrate guidance changes with training load more than protein guidance does. The ranges below come from general sports-nutrition guidance across different sports and workloads. They show the direction of the relationship; they are not automatic targets for every resistance-training program. [5]
Training load | Carbohydrate target | 70 kg athlete |
Light: low intensity or skill work | 3–5 g/kg per day | 210–350 g |
Moderate: around 1 hour per day | 5–7 g/kg per day | 350–490 g |
High: 1–3 hours of moderate to high intensity | 6–10 g/kg per day | 420–700 g |
Very high: extreme volume, 4+ hours | 8–12 g/kg per day | 560–840 g |
The highest ranges mainly apply to prolonged, high-volume endurance training. Resistance-training needs vary with session length, volume, intensity, and the rest of your diet. The aim is not to select a row and hit it exactly. It is to notice whether carbohydrate intake repeatedly falls as training demand rises, or whether your lowest-carbohydrate days tend to appear before sessions that feel harder than expected.
A note if you eat low-carb: none of this says a lower-carb approach can’t work. Plenty of people train well on one, and the body does adapt to using more fat at lower intensities. What the research is consistent about is narrower than the debate around it. High-intensity efforts draw on glycogen specifically. [7] So if your training includes repeated hard sets or intervals and recovery has been poor, carbohydrate intake is worth checking before you rule it out. It may be the answer, or it may not. It’s one of the three baselines worth checking rather than dismissing by default.
Four Things People Get Wrong About This
Myth: more protein is always better. What’s actually true: in resistance-training studies the benefit flattens out around 1.6 g/kg, with some individuals seeing a little more up to about 2.2. [1] Past that, the extra protein hasn’t been shown to add muscle or strength. These are strength-training figures; someone training for general health needs less than this. [5]
Myth: if I’m eating clean, I’m fueled. What’s actually true: food quality and food quantity are separate issues. A well-composed day can still be 700 calories short of what a heavy week demanded.
Myth: a bad session means I need to push harder. What’s actually true: one difficult session has many possible explanations. If the same pattern repeats, recent protein, total energy, and carbohydrate intake are three variables worth checking alongside sleep, stress, and the training plan itself.
Myth: my wearable would tell me. What’s actually true: a wearable measures outputs, heart rate, sleep, strain, recovery scores. None of those are intake. Your device can tell you recovery is poor. It can’t tell you that you ate 90 grams of protein on a 130-gram day.
How the Three Fit Together
These aren’t three separate problems. They work as one system, in a set order.
Total energy comes first, because it sets the limit on what the other two can do. Protein and carbohydrate are how you spend the energy you have: protein for rebuilding muscle, carbohydrate for fueling the work that makes rebuilding necessary. [5] If your total is too low, how you split it matters much less. If your total is right, the split is where the difference shows up.
That’s why checking one of them on its own usually doesn’t answer much. Protein at 1.8 g/kg means one thing when you’re eating enough overall, and something different in a steep deficit during a heavy training block. The number only makes sense next to the other two.
A Quick Self-Audit
Six questions you can answer from data you probably already have:
- What was your average daily protein over the last two weeks, and what is it in g/kg?
- Has your bodyweight changed since you last set your protein target?
- Did training volume increase in the last month while average intake stayed flat?
- If you are eating less intentionally, did protein and carbohydrate fall too?
- What did carbohydrate intake look like in the day or two before your hardest sessions?
- Does your protein arrive across the day, or mostly at one meal?
No single answer means much on its own. Two or three pointing the same way is a pattern worth looking into.
Explain It In One Sentence Each
Protein: the material your body rebuilds with. If you’re training for strength, research points to roughly 1.6 grams per kilogram of bodyweight a day, on ordinary days as well as good ones. [1]
Total energy: the context for the other two baselines. The useful question is whether your average intake has kept pace with your training demand over time.
Glycogen: your stored carbohydrate and an important fuel for hard effort. Recent carbohydrate intake is one variable to review when repeated high-intensity work feels harder than expected. [5]
That is the framework. The next step is to compare it with a consistent stretch of your own data.
Understanding The System, Seeing The Pattern
Understanding this does not require a new plan or a stricter one. It requires seeing these three things together over a long enough window to mean something: protein against your bodyweight, average energy intake against training demand, and carbohydrate against your hardest days. No single day can answer the question. The pattern shows up across a consistent stretch of logging.
Cronometer can help you organize those patterns. It cannot prove why a plateau happened, but it can help you identify a reasonable variable to test.
Ready to check your own data? Training Stalled? How to Check Protein, Calories and Carbs in Cronometer walks through the settings, reports, and one-variable experiments step by step.
Final Thoughts
The three baselines work as one system. Total energy provides the context. Protein supplies amino acids for repair and rebuilding, while carbohydrate helps fuel hard work. Each has a useful range, and the relevant range can change with your bodyweight, goals, and training load. Seeing all three together will not diagnose a plateau, but it gives you a clear place to start looking.
Quick Facts
Protein benefits for muscle growth alongside resistance training tend to plateau around 1.6 grams per kilogram of bodyweight per day, with some individuals seeing benefit up to roughly 2.2 g/kg. [1] These figures come from resistance-training research and describe a strength-training target, not a general intake recommendation for the average adult. Requirements vary with the type and duration of training. [8] For a 70 kg lifter, 1.6 g/kg is approximately 112 grams per day.
For an adult who isn’t training for strength, the general protein recommendation is 0.8 g/kg per day. Athlete guidance runs 1.2 to 2.0 g/kg depending on sport and training phase, [5] and 1.4 to 2.0 g/kg for people exercising regularly. [9] The 1.6 to 2.2 g/kg figure applies to the upper end of that range: resistance training with a strength goal.
Protein guidance is often expressed relative to bodyweight, so a change in bodyweight changes the gram amount at the same g/kg benchmark. Training type and volume can also affect which part of an athlete range is most relevant.
Spreading protein across three to four meals, roughly 0.4 g/kg per meal, supports muscle repair better than eating the same daily total in one large meal. [2]
Energy availability is a research concept, not a single calorie target. For most people, the more useful check is whether average intake has kept pace with training demand across a consistent stretch of days. A repeated gap may matter more during a heavy training phase, but no one deficit threshold fits every person.
Glycogen is carbohydrate stored in muscle and liver, typically 300 to 600 grams in a trained adult, and the main fuel for high-intensity exercise. [5][6]
General sports-nutrition guidance scales carbohydrate with training load, from about 3 to 5 g/kg per day for light training up to 8 to 12 g/kg per day for very high-volume endurance work. [5] These ranges span different sports and are context, not automatic targets for resistance training.
A possible carbohydrate shortfall may be easier to spot by reviewing intake in the day or two before hard sessions, rather than looking only at the workout day. [5]
Put the Baselines Into Practice
Training Stalled? How to Check Protein, Calories and Carbs in Cronometer – use your own Cronometer data to review averages, check timing, and test one change at a time.
Energy Summary – understand energy consumed, energy burned, and your target or energy balance.
Macronutrient Breakdown – compare logged protein, carbohydrate, and fat with your daily targets.
Nutrition Report – review average daily intake across a selected time range.
About the Author
Keshia Blake
Brand & Communications Specialist, Cronometer
Keshia helps translate nutrition science into clear, human-centered stories that empower people to better understand their health. Her background spans healthcare, health behaviour change, advertising, creative strategy, and brand communications.
Citations
- Morton RW, Murphy KT, McKellar SR, et al. A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults. Br J Sports Med. 2018;52(6):376-384. doi:10.1136/bjsports-2017-097608
- Schoenfeld BJ, Aragon AA. How much protein can the body use in a single meal for muscle-building? Implications for daily protein distribution. J Int Soc Sports Nutr. 2018;15:10. doi:10.1186/s12970-018-0215-1
- Mountjoy M, Ackerman KE, Bailey DM, et al. 2023 International Olympic Committee's (IOC) consensus statement on Relative Energy Deficiency in Sport (REDs). Br J Sports Med. 2023;57(17):1073-1097. doi:10.1136/bjsports-2023-106994
- Loucks AB, Thuma JR. Luteinizing hormone pulsatility is disrupted at a threshold of energy availability in regularly menstruating women. J Clin Endocrinol Metab. 2003;88(1):297-311. doi:10.1210/jc.2002-020369
- Thomas DT, Erdman KA, Burke LM. Position of the Academy of Nutrition and Dietetics, Dietitians of Canada, and the American College of Sports Medicine: Nutrition and Athletic Performance. J Acad Nutr Diet. 2016;116(3):501-528. doi:10.1016/j.jand.2015.12.006
- Burke LM, Hawley JA, Wong SH, Jeukendrup AE. Carbohydrates for training and competition. J Sports Sci. 2011;29(Suppl 1):S17-S27. doi:10.1080/02640414.2011.585473
- Burke LM. Ketogenic low-CHO, high-fat diet: the future of elite endurance sport? J Physiol. 2021;599(3):819-843. doi:10.1113/JP278928
- Amawi A, AlKasasbeh W, Jaradat M, et al. Athletes' nutritional demands: a narrative review of nutritional requirements. Front Nutr. 2024;10:1331854. doi:10.3389/fnut.2023.1331854
- 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. doi:10.1186/s12970-017-0177-9
