Only SSG increased total body fat-free mass ( TB-FFM ; +1.1 1.2 kg ; P = 0.001 ) and decreased concentration of plasma IL-6 ( -0.69 0.62 pg mL ( -1 ) ; P = 0.002 ) and leptin ( -2,212 2,531 ng mL ( -1 ) ; P = 0.014 ) .