A Collaboration between Captain Clarex AKA Eric Ballenger and Dr. Eugene Y. Chan M.D.
Why is it, that so many people put such an enormous amount of thought into what they eat all day long, and not immediately post-workout? Everyone training muscle, regardless of their chosen mode of exercise, must take their post-exercise nutrition seriously in order to provide their muscle with the required raw materials. Since all types of exercise use carbohydrates for energy, it is inevitable that muscles require carbohydrates afterwards. Therefore, post-workout carbohydrates are important to refill this key ingredient in your muscles.
However, any amount of carbohydrates will not do. You need to consume enough carbohydrates to promote a substantial insulin release. Insulin is the hormone responsible for shuttling glucose into muscle cells. Furthermore, insulin leads to increased glycogen synthesis in liver and muscle cells. Insulin has overall anabolic, or “building up,” effects on the body. The addition of protein to this post-workout carbohydrate routine adds the basic building blocks for this overall anabolic process (Miller et al., 2003; Volek, 2004). There many recommended ratios out there concentrating on the glycemic index and the carbohydrate to protein ratio, including a 4:1 or 5:1 ratio (Cordain, 2010). Researchers have utilized a 0.8 g of carbohydrates per kg of body weight as a recommended amount for stimulating anabolic effects of insulin (van Loon et al., 2000). At a 4:1 ratio, this is 0.2 g protein per kg of body weight. An increased consumption of essential amino acids may lead to a more positive protein balance. For instance a 0.4 g/kg may by better. A protein intake range of 0.2 g/kg to 0.4 g/kg is therefore appropriate.
While your post-workout feeding should be rich protein and carbohydrate, this meal should be fat free. The consumption of essential fats is one of the most overlooked areas of daily nutritional intake but during the post workout period, eating fat can actually decrease the effectiveness of your post-workout beverage. Since fat slows down transit through the stomach, eating fat during the post workout period may slow the digestion and absorption of carbohydrates and proteins.
Cordain, L. The Paleo Diet for Athletes: A Nutritional Formula for Peak Athletic Performance. December 16, 2010.
Miller, S.L., K.D. Tipton, D.L. Chinkes, S.E. Wolf, and R.R. Wolfe. Independent and combined effects of amino acids and glucose after resistance exercise. Med. Sci. Sports Exerc. 34:449-55, 2003
Van Loon, L., Saris, W.H., Kruijshoop, M., and Wagenmakers, A.J. Maximizing postexercise muscle glycogen synthesis: carbohydrate supplementation and the application of amino acid or protein hydrolysate mixtures. American Journal of Clinical Nutrition. 72(1):106-111, 2000.
Volek, J.S. Influence of nutrition on responses to resistance training. Med. Sci. Sports Exerc. 36:689-96,2004.