Weight loss without losing muscle mass

 Posted by Chantel M. Contributed by US National Library of Medicine National Institutes of Health

In the study of Weight loss without losing muscle mass in pre-obese and obese subjects induced by a high-soy-protein diet, posted in PubMed, researchers found that In all, 83 subjects completed the 6-months study. BMI dropped highly significantly in all groups (LE-G: -2.2+/-1.43 kg/m(2); SD-G: -3.1+/-1.29 kg/m(2); SD/PA-G: -3.0+/-1.29 kg/m(2)). Subjects in the SD-G and in the SD/PA-G lost more weight during the 6-months study (-8.9+/-3.9; -8.9+/-3.9 kg) than did those in the LE-G (-6.2+/-4.2 kg), and had a greater decrease in fat mass (-8.8+/-4.27; -9.4+/-4.54 kg) than those in the LE-G (-6.6+/-4.59 kg). In contrast, no significant intraindividual or between-group changes in the fat-free mass were seen. In all groups, metabolic parameters showed an improvement in glycemic control and lipid profile and suggested that a high-soy-protein and low-fat diet can improve the body composition in overweight and obese people, losing fat but preserving muscle mass.

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