For twenty years the gym rule was absolute: get protein in within thirty minutes of your last set or the workout was wasted. It sold a lot of powder. It was also built on very thin ground.
Schoenfeld and Aragon reviewed the timing literature and later ran a meta-analysis on it. Their conclusion: the post-exercise window is far wider than the folklore claimed — hours, not minutes — and once you account for total daily protein intake, the apparent timing benefit largely disappears. Total protein was doing the work all along.
That is genuinely good news if you are over 50. It means you can stop watching the clock and spend that attention on the number that matters.
So does timing matter at all?
A little, in two specific places. Not because of a window, but because of arithmetic.
First, the size of each serving. Older muscle is less responsive to protein. Reviews of the older-adult literature point to roughly 25 to 40 grams of quality protein per meal as the amount that reliably switches muscle building on. Timing is really just the practical question of how you fit three or four servings that size into a day.
Second, overnight. A trial by Kouw and colleagues gave healthy older men protein before sleep and measured a genuine increase in overnight muscle protein synthesis. Ten hours between dinner and breakfast is the longest gap in your day, and closing it with a slow-digesting protein has real support.
Does the spread across the day matter?
Several controlled trials have compared an even protein spread against a lopsided one, with most protein loaded into dinner. In healthy older adults with adequate daily intake, the pattern made no meaningful difference to muscle protein synthesis, lean mass, strength or physical function. One eight-week trial in older men found the distribution changed nothing.
The reason to spread it out is not a metabolic trick. It is that piling 70 grams into one dinner is a hard way to reach 120 grams, and a 25-gram breakfast is an easy way.
Free download
Four days of meals with the protein already worked out.
The 45-Food Protein Cheat Sheet, four-day meal plans for meat, no-meat, and plant-based eaters, plus two high-protein smoothies.
Send it to me →When to actually drink the shake
- At breakfast — the highest-value slot for most people over 50. Breakfast is where the day's protein is usually lost. A shake blended with milk turns a 6-gram breakfast into a 35-gram one in under a minute.
- After training, whenever it is convenient — same day is what matters, not same half hour. If you train at 6 a.m. and eat at 8, you are fine.
- Before bed, if you are close to your target — casein or cottage cheese. Worth doing once the basics are handled, not before.
- Whenever real food is going to lose — a travel day, a long errand run, a skipped lunch. A shake is a tool for filling gaps, not a lifestyle.
The order of operations
If you only fix one thing, fix the total. PROT-AGE recommends healthy older adults reach 1.0 to 1.2 grams of protein per kilogram of body weight per day, more when active, and pair it with resistance training. Hit that and the timing details are worth a couple of percent. Miss it by 40 grams and no schedule saves you.
- Total daily protein.
- 25 to 40 grams per sitting.
- Two or three lifting sessions a week.
- Then, if you like, a pre-bed dose.
Get your own number in about ten seconds — run the protein calculator →
Free, one page, no fluff
Get the 45-Food Protein Cheat Sheet
45 everyday foods with protein per serving, four-day meal plans for meat, no-meat, and plant-based eaters, and two high-protein smoothies.
No spam. Your email is never sold or shared. Unsubscribe anytime.
Where these numbers come from
- Schoenfeld BJ, Aragon AA. Nutrient timing revisited: is there a post-exercise anabolic window? (JISSN, 2013)
- Aragon AA, Schoenfeld BJ. Clearing up controversies on the postworkout window (JOSPT, 2018)
- Kouw IWK, et al. Protein ingestion before sleep increases overnight muscle protein synthesis in older men (J Nutr, 2017)
- Kramer IF, et al. Protein distribution pattern in older men (Clinical Nutrition, 2017)
- Bauer J, et al. PROT-AGE Study Group position paper (JAMDA, 2013)