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Protein Timing: Does It Actually Matter?

Total daily protein matters most. Learn why timing is secondary and how to optimize meal distribution for muscle protein synthesis.

Protein Timing: Does It Actually Matter?

Nutrition • Feb 28, 2024 • Keywords: protein timing, anabolic window, muscle protein synthesis

TL;DR: Total daily protein and consistent resistance training matter more than hitting a narrow “anabolic window.” For most exercising adults, 1.4–2.0 g/kg/day is a well-supported range; some lifters use up to about 2.2 g/kg/day as a practical upper target. Spreading protein across the day is reasonable.

What matters most

  • Total daily protein: roughly 1.4–2.0 g/kg for most exercising adults; needs vary with body size, age, energy intake, and goal.
  • A practical serving is about 0.25–0.40 g/kg of high-quality protein, spaced every 3–4 hours when convenient.
  • Protein before or after training can support muscle protein synthesis, but there is no evidence that missing a very short post-workout window ruins progress.

Practical moves

  • Choose a meal pattern you can repeat while meeting total energy and protein needs.
  • Pre-sleep protein can increase overnight synthesis in studied settings, but it is optional and should fit your daily total.
  • Use foods or protein powder according to preference, tolerance, cost, and convenience.

If you have kidney disease, another condition affected by protein intake, are pregnant, or have been given a therapeutic diet, ask a physician or registered dietitian for an individualized target.

Sources

  1. Jäger R, et al. International Society of Sports Nutrition Position Stand: protein and exercise. J Int Soc Sports Nutr. 2017;14:20. PubMed
  2. Morton RW, et al. A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains. Br J Sports Med. 2018;52:376–384. PubMed
  3. Kerksick CM, et al. International society of sports nutrition position stand: nutrient timing. J Int Soc Sports Nutr. 2017;14:33. PMC
  4. Reis CEG, et al. Effects of pre-sleep protein consumption on muscle-related outcomes: a systematic review. J Sci Med Sport. 2021;24(2):177–182. PubMed
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