HMB-FA resulted in increased total strength ( bench press , squat , and deadlift combined ) over the 12-week training ( 77.1 18.4 vs. 25.3 22.0 kg , p < 0.001 ) ; a greater increase in vertical jump power ( 991 168 vs. 630 167 W , p < 0.001 ) ; and increased lean body mass gain ( 7.4 4.2 vs. 2.1 6.1 kg , p < 0.001 ) in HMB-FA - and placebo-supplemented groups , respectively .