- Aug 15, 2018
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Hey everyone,
Meal timing might be the most argued-over topic in training nutrition. One camp treats the post-workout shake like a countdown timer — miss the window and the workout was wasted. The other camp says only total daily intake matters and timing is a rounding error. As usual, the research lands somewhere in the middle, and it is more interesting than either slogan. Here is a rundown of what the studies actually show, so we can argue from evidence instead of gym folklore.
## 1. The "anabolic window" is real, but it is wide
The classic claim — that you must get protein within 30 minutes of your last set or lose your gains — does not hold up the way it was sold. In 2013, Aragon and Schoenfeld published a review in the Journal of the International Society of Sports Nutrition looking specifically at whether a narrow post-exercise window exists. Their conclusion: for most lifters eating normal meals through the day, the urgency was overstated. The body stays sensitized to protein for many hours after training, not minutes.
A meta-analysis that same year by Schoenfeld, Aragon, and Krieger pooled 23 studies on protein timing around workouts and its effect on muscle growth and strength. There was a small positive effect of timing — but once the researchers accounted for total daily protein intake, most of that effect faded. In other words, the people who timed their protein also tended to eat more protein overall, and that was doing most of the work.
That does not mean timing is meaningless. It means it is a second-order factor. If your total intake is dialed in, timing is fine-tuning. If your total intake is low, no timing trick rescues it.
## 2. Total daily protein is the main lever
The International Society of Sports Nutrition's position stand on protein and exercise (Jager and colleagues, 2017) recommends about 1.4 to 2.0 grams of protein per kilogram of body weight per day for people training to build muscle and strength. Spreading that across three to five meals through the day is the strategy with the broadest support.
This is the least exciting finding and the most important one. Before worrying about the clock, it is worth honestly assessing whether daily totals are consistent — many of the "timing" effects people notice turn out to be "I finally started eating enough" effects.
## 3. Pre-sleep protein has some of the best timing evidence
If there is one timing strategy with genuinely solid research behind it, it is protein before bed. In a 2015 study in the Journal of Nutrition, Snijders and colleagues put 44 young men through 12 weeks of resistance training. Half received 27.5 grams of protein before sleep each night; half got a placebo. The pre-sleep protein group finished the study with greater gains in muscle mass and strength.
The logic is straightforward: sleep is the longest stretch of the day without food, and muscle repair runs overnight. A protein-containing evening meal or snack gives that process material to work with. Among all the timing strategies out there, this is the one to show a skeptic first.
## 4. Time-restricted eating does not seem to cost you muscle
A common worry: if I compress my eating into fewer hours, will training suffer? A 2016 study by Moro and colleagues in the Journal of Translational Medicine tested exactly that. Thirty-four resistance-trained men trained for eight weeks while eating either normally or within an 8-hour daily window (16 hours fasting). The time-restricted group lost fat mass while maintaining muscle mass and strength.
So if life pushes your meals into a shorter window — shift work, a busy schedule, or just preference — the evidence says your training does not automatically suffer, as long as total intake stays where it needs to be. The clock matters less than the totals.
## 5. Fasted versus fed training: mostly personal preference
What about eating before the session itself? The research here is mixed and leans toward individual preference. Some lifters train great on an empty stomach; others feel flat without a meal a couple of hours beforehand. No study has shown a clear muscle-growth advantage to fasted training, and performance in the session itself — which drives long-term progress — is easier to sustain when fueled. The honest evidence-based position is: eat beforehand if it makes your training better, and do not stress if your schedule does not allow it.
## The bottom line
If the evidence had to be ranked, it would look like this: first, consistent total daily protein and calories; second, spreading protein across the day with something before sleep; third, peri-workout timing as a minor optimization. The lifters who treat the order that way tend to make the steadiest progress — and spend the least energy arguing about shaker bottles.
Now I am curious where this community lands:
1. Do you eat before you train? Have you noticed any real difference in your session quality on days you train fasted versus fed?
2. Has anyone run a stretch of consistent pre-sleep protein — a shake, cottage cheese, or Greek yogurt before bed — for a couple of months? What did you notice?
3. For the early-morning or late-night lifters: how do you arrange your meals around your sessions, and what has worked best with your schedule?
— OLYMPIC
Meal timing might be the most argued-over topic in training nutrition. One camp treats the post-workout shake like a countdown timer — miss the window and the workout was wasted. The other camp says only total daily intake matters and timing is a rounding error. As usual, the research lands somewhere in the middle, and it is more interesting than either slogan. Here is a rundown of what the studies actually show, so we can argue from evidence instead of gym folklore.
## 1. The "anabolic window" is real, but it is wide
The classic claim — that you must get protein within 30 minutes of your last set or lose your gains — does not hold up the way it was sold. In 2013, Aragon and Schoenfeld published a review in the Journal of the International Society of Sports Nutrition looking specifically at whether a narrow post-exercise window exists. Their conclusion: for most lifters eating normal meals through the day, the urgency was overstated. The body stays sensitized to protein for many hours after training, not minutes.
A meta-analysis that same year by Schoenfeld, Aragon, and Krieger pooled 23 studies on protein timing around workouts and its effect on muscle growth and strength. There was a small positive effect of timing — but once the researchers accounted for total daily protein intake, most of that effect faded. In other words, the people who timed their protein also tended to eat more protein overall, and that was doing most of the work.
That does not mean timing is meaningless. It means it is a second-order factor. If your total intake is dialed in, timing is fine-tuning. If your total intake is low, no timing trick rescues it.
## 2. Total daily protein is the main lever
The International Society of Sports Nutrition's position stand on protein and exercise (Jager and colleagues, 2017) recommends about 1.4 to 2.0 grams of protein per kilogram of body weight per day for people training to build muscle and strength. Spreading that across three to five meals through the day is the strategy with the broadest support.
This is the least exciting finding and the most important one. Before worrying about the clock, it is worth honestly assessing whether daily totals are consistent — many of the "timing" effects people notice turn out to be "I finally started eating enough" effects.
## 3. Pre-sleep protein has some of the best timing evidence
If there is one timing strategy with genuinely solid research behind it, it is protein before bed. In a 2015 study in the Journal of Nutrition, Snijders and colleagues put 44 young men through 12 weeks of resistance training. Half received 27.5 grams of protein before sleep each night; half got a placebo. The pre-sleep protein group finished the study with greater gains in muscle mass and strength.
The logic is straightforward: sleep is the longest stretch of the day without food, and muscle repair runs overnight. A protein-containing evening meal or snack gives that process material to work with. Among all the timing strategies out there, this is the one to show a skeptic first.
## 4. Time-restricted eating does not seem to cost you muscle
A common worry: if I compress my eating into fewer hours, will training suffer? A 2016 study by Moro and colleagues in the Journal of Translational Medicine tested exactly that. Thirty-four resistance-trained men trained for eight weeks while eating either normally or within an 8-hour daily window (16 hours fasting). The time-restricted group lost fat mass while maintaining muscle mass and strength.
So if life pushes your meals into a shorter window — shift work, a busy schedule, or just preference — the evidence says your training does not automatically suffer, as long as total intake stays where it needs to be. The clock matters less than the totals.
## 5. Fasted versus fed training: mostly personal preference
What about eating before the session itself? The research here is mixed and leans toward individual preference. Some lifters train great on an empty stomach; others feel flat without a meal a couple of hours beforehand. No study has shown a clear muscle-growth advantage to fasted training, and performance in the session itself — which drives long-term progress — is easier to sustain when fueled. The honest evidence-based position is: eat beforehand if it makes your training better, and do not stress if your schedule does not allow it.
## The bottom line
If the evidence had to be ranked, it would look like this: first, consistent total daily protein and calories; second, spreading protein across the day with something before sleep; third, peri-workout timing as a minor optimization. The lifters who treat the order that way tend to make the steadiest progress — and spend the least energy arguing about shaker bottles.
Now I am curious where this community lands:
1. Do you eat before you train? Have you noticed any real difference in your session quality on days you train fasted versus fed?
2. Has anyone run a stretch of consistent pre-sleep protein — a shake, cottage cheese, or Greek yogurt before bed — for a couple of months? What did you notice?
3. For the early-morning or late-night lifters: how do you arrange your meals around your sessions, and what has worked best with your schedule?
— OLYMPIC