This study found that subjects who were dehydrated at 2.5% and 5% of their bodyweights had higher insulin levels following exercise. Dehydration can reduce insulin sensitivity which can impair muscle growth and overall gains. Drink 16oz of water before and after your workout and shoot for at least 2-3 liters of water per day to optimize hydration levels.
Source: Judelson, D. A., et. al. (2008). Effect of hydration state on resistance exercise-induced endocrine markers of anabolism, catabolism, and metabolism. Journal of Applied Physiology, 105(3), 816-824.
From being a mediocre athlete, to professional powerlifter and strength coach, and now to researcher and writer, Charlie combines education and experience in the effort to help Bridge the Gap Between Science and Application. Charlie performs double duty by being the Content Manager for The Muscle PhD as well as the Director of Human Performance at the Applied Science and Performance Institute in Tampa, FL. To appease the nerds, Charlie is a PhD candidate in Human Performance with a master’s degree in Kinesiology and a bachelor’s degree in Exercise Science. For more alphabet soup, Charlie is also a Certified Strength and Conditioning Specialist (CSCS), an ACSM-certified Exercise Physiologist (ACSM-EP), and a USA Weightlifting-certified performance coach (USAW).