Metabolic window

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The metabolic window is a term used in strength training to describe the 30-minute (give or take, dependent on the individual) period after exercise during which nutrition can shift the body from a catabolic state to an anabolic one. Specifically, it is during this period that the intake of protein and carbohydrates can aid in the increase of muscle mass.[1]

Some theorists believe the metabolic window begins to close within minutes of the end of a workout. The same nutrients taken two hours later result in significantly reduced protein synthesis and muscle glycogen storage.[1] Further research is needed into the effects of food and exercise timing, but methodology has to be considered in these experiments.[2]

Currently there is not sufficient scientific evidence to support the metabolic window theory.[citation needed]

See also[edit]


  1. ^ a b Ivy, John & Portman, Robert. Nutrient Timing: The Future of Sports Nutrition. Basic Health Publications, Inc., 2004.
  2. ^ Tipton, Kevin D. (2008). "Protein for adaptations to exercise training". Volume 8, Issue 2. European Journal of Sport Science. Retrieved April 8, 2012.