Direct answer
Picture the gym parking lot, a shaker bottle, and the worry that ten minutes have already “closed the window.” The International Society of Sports Nutrition’s 2017 position stand on protein is calmer than that. The anabolic effect of exercise is long-lasting — at least 24 hours in the way the authors put it — and it likely fades as more time passes after training. Benefits show up from protein eaten before or after the session. The stand’s own summary says total protein and calorie intake is the main consideration for strength and muscle, and that the effect of eating in the exact minutes before or after training looks small in non-athletic groups. Eat the day. Use the workout as one of the times you eat it. Do not fail the session because the bottle was late.
The daily frame from that paper is about 1.4–2.0 g of protein per kilogram of body weight for most exercising adults building or keeping muscle, with per-serving amounts around 0.25 g per kilogram or about 20–40 g of high-quality protein. How much protein natural lifters need does the arithmetic. This page is only about when those meals sit around the session.
What the stand actually says about the clock
ISSN reviews both sides and then lands in a practical place. Protein around the workout can support recovery and is a chance to raise the daily total. Immediate timing is not a magic slot that outruns a low daily intake. One line in the stand is worth keeping: perhaps the most important thing about peri-workout protein is that it is an opportunity to eat.
The paper also describes spreading feedings through the day. In one section it discusses feedings about every 3–4 hours so the response does not depend on a single huge meal. It cites a recovery study (Areta and colleagues) in which 20 g of whey every three hours over 12 hours after lifting stimulated myofibrillar protein synthesis more than two doses of 40 g or eight doses of 10 g. The authors themselves note that 80 g across those 12 hours is quite low. So the pattern is a clue about distribution, not a menu that replaces a full day of 1.4–2.0 g/kg. A larger lifter still has to hit the larger daily total. The even spacing is how you carry that total, not a reason to stop at 80 g.
You might be thinking you need a shake the minute the last set ends. Pre- or post-workout protein can both fit. Individual tolerance matters. A meal in the hours around training is a reasonable feeding. If you already eat enough for the day, shifting the same grams by an hour is a smaller lever than missing the daily range.
Before the session
Show up able to train. A huge, unfamiliar meal ten minutes before a squat is how people get nauseated and call it a bad program. A long fast that leaves you lightheaded is the other error. Most people do well with a normal meal one to three hours before, with protein in it and enough carbohydrate that the session is not a crawl, plus a smaller snack closer to training if the meal was early. That sentence is a coaching pattern, not a trial result. Adjust it to the stomach you have.
If you train first thing, a small protein-containing meal or drink you already know you tolerate is enough to start. You can eat the rest of breakfast after. You do not have to force a large plate at 5 a.m. to “earn” the workout. You do have to put those grams somewhere else in the day so the daily total still happens.
Caffeine and a huge dose of fat right before training are common reasons the warm-up feels awful. Move the heavy food earlier. Keep the pre-training meal boring and repeatable. The session is the experiment. The meal should not be.
After the session
Eat a real meal with protein in the window you can actually manage: in the gym bag, on the way home, or at the next planned plate. ISSN notes that post-exercise muscle protein synthesis rises and can stay elevated for many hours, which is why both a sooner meal and later meals have a rationale. Sooner is convenient. It is not a moral victory. Later still counts, especially if “later” is still the same day and the daily total is intact.
Include carbohydrate in that meal if you have another session soon or if the workout was long. This page will not invent a gram of carbohydrate you must hit. It will say that protein-only, forever, is a strange way to fuel repeated training. If you are also eating less to lose fat, keep the protein meal and let the deficit live in the rest of the day. Cutting while keeping performance is that conversation. Do not skip the post-training meal as a punishment.
A shake is useful when a meal is an hour away and you are genuinely hungry, or when appetite is poor. It is not more anabolic than a plate that already holds 20–40 g of high-quality protein. Whole foods can meet the day. ISSN says so.
The evening option, and the night’s sleep
The stand includes a pre-sleep casein dose of about 30–40 g as one option that raised overnight muscle protein synthesis in the studies it reviews. That is optional. If dinner already covered a solid protein serving, you do not need a second product to finish the day. If dinner is tiny because you train late, a protein-rich snack before bed can be how the daily total survives.
Do not let the snack wreck the night. Sleep as a training variable is the recovery tool a late feast can steal. A huge greasy meal at midnight is not the ISSN suggestion. A planned protein serving is.
The macro calculator helps you see whether the day, not the minute, is in range. Use it as arithmetic. It is not a prescription, and it is the wrong tool if a clinician has already given you a diet.
A day that is specific without being fragile
Here is an illustrative day for someone who lifts after work. It is not a study diet and the foods are examples, not requirements.
| Time relative to training | What the meal is doing | What it does not need to be |
|---|---|---|
| 2–3 hours before | A normal plate with protein and some carbohydrate | A new recipe you have never digested |
| About an hour before, if hungry | A small familiar snack | A second full dinner |
| Within a few hours after | Protein in the 20–40 g neighborhood, plus the rest of a meal | A stopwatch set to 30 minutes |
| Later in the evening | Whatever grams the daily total still needs | A dessert you added only because a caption said “anabolic” |
If travel or a shift deletes one of those slots, move the grams. Do not declare the workout wasted. The stand’s 24-hour remark is the reason you get to be a person with a job.
See a registered dietitian or a physician before you build the day around shakes if you have kidney disease, diabetes with a meal plan, an eating disorder, or you are pregnant. Timing tweaks are not care for those situations.
When you look at yesterday, did the daily protein total land in the ISSN range, or did you only succeed at being fast with a shaker?
Sources
- Jäger R, Kerksick CM, Campbell BI, et al. International Society of Sports Nutrition position stand: protein and exercise. Journal of the International Society of Sports Nutrition. 2017;14:20. Full paper.
- Areta JL, Burke LM, Ross ML, et al. Timing and distribution of protein ingestion during prolonged recovery from resistance exercise alters myofibrillar protein synthesis. J Physiol. 2013;591:2319–2331. Discussed in the ISSN stand; the 80 g total is the authors’ context, not a daily target.
General nutrition education for healthy adults who train. Not a medical diet, not a supplement endorsement, and not advice for a clinical condition.