Interesting .....
In a recent study in the Annals of Nutrition and Metabolism, they compared the effects of a moderate diet, high-protein diet and resistance training, using two different protein supplements, or the diet alone on body compositional changes in overweight police officers (1). It was a randomized 12-week study. One group was placed on a hypocaloric diet alone (80% of maintenance). A second group was placed on the hypocaloric diet plus resistance exercise plus a high-protein intake (1.5 g/kg/day) using a casein protein hydrolysate. In the third group treatment was identical to the second, except for the use of a whey protein hydrolysate. They found no difference in total weight loss between groups (about 5.5 lbs. for all groups). Mean percent body fat with diet alone decreased from 27 to about 25% at 12 weeks. With diet, exercise and casein the decrease was from 26 to about 18%, and with diet, exercise and whey protein the decrease was from 27 to about 23%. So the mean fat loss was 2.5 (no protein supplement), 7.0 (casein supplement) and 4.2 kg (whey supplement) in the three groups. Lean mass gains in the three groups did not change for diet alone, versus gains of about 4 kg in the casein group and 2 kg in the whey group. Mean increase in strength for chest, shoulder and legs was 59% for casein versus 29% for whey, a statistically significant difference.
In a recent study in the Annals of Nutrition and Metabolism, they compared the effects of a moderate diet, high-protein diet and resistance training, using two different protein supplements, or the diet alone on body compositional changes in overweight police officers (1). It was a randomized 12-week study. One group was placed on a hypocaloric diet alone (80% of maintenance). A second group was placed on the hypocaloric diet plus resistance exercise plus a high-protein intake (1.5 g/kg/day) using a casein protein hydrolysate. In the third group treatment was identical to the second, except for the use of a whey protein hydrolysate. They found no difference in total weight loss between groups (about 5.5 lbs. for all groups). Mean percent body fat with diet alone decreased from 27 to about 25% at 12 weeks. With diet, exercise and casein the decrease was from 26 to about 18%, and with diet, exercise and whey protein the decrease was from 27 to about 23%. So the mean fat loss was 2.5 (no protein supplement), 7.0 (casein supplement) and 4.2 kg (whey supplement) in the three groups. Lean mass gains in the three groups did not change for diet alone, versus gains of about 4 kg in the casein group and 2 kg in the whey group. Mean increase in strength for chest, shoulder and legs was 59% for casein versus 29% for whey, a statistically significant difference.