A study done by Fern et. al (1991) showed that greater gains in body mass occur over four weeks of heavy weight training when young men consumed 3.3 versus 1.3 grams if protein per kilogram of body mass. In addition a study done by Meredith et al. (1992) found that a daily dietary supplement containing 23 grams of protein combined with weight training can enhance muscle mass gains relative to similar subjects who trained with out the supplement. Both of the studies show support for the belief that increased protein in the diet can help increase muscle mass, but it should be noted that these effects were found with a combination of intake and training. These two studies further indicated that a protein intake of about 1.7 - 1.8 grams of protein per kilogram of body weight per day, when combined with weight training will enhance muscle development compared with similar training with an intake of 0.8 grams of protein per kilogram of body weight per day (5.) However, it is important to note that there is little good evidence that the very high protein intakes (more than 2 grams per kilogram of body weight per day) typically consumed by strength athletes are beneficial. Moreover, it is possible to obtain this quantity of protein without special supplementation assuming a mixed diet containing sufficient energy is consumed.
I haven't searched up the studies listed.
I haven't searched up the studies listed.