Abstract
ABSTRACT We compared eight weeks of auto-regulatory progressive resistance exercise (APRE) to linear programming resistance exercise (LPRE) on changes in muscular strength and endurance, anaerobic power, and body composition in recreationally active males. Twenty-four recreationally active males (age: 24 ± 3 y; body mass: 78.3 ± 10.3 kg) were randomly assigned to one of two groups: APRE (n = 12) and LPRE (n = 12). Both groups performed supervised training 3x/week for eight weeks Upper and lower body muscular strength and endurance, anaerobic power, and body composition were assessed at baseline, week 4, and 48 h after the final training session. Repeated measures ANOVA and hedge's g effect sizes (ES) were used to interpret the data. After training, there was a significant increase in absolute leg press (APRE: ES = 2.23; LPRE: ES = 1.35) and chest press strength (APRE: ES = 2.19; LPRE: ES = 0.98), upper (APRE: ES = 2.50; LPRE: ES = 1.074), and lower body peak power (APRE: ES = 0.78; LPRE: ES = 0.39), and upper (APRE: ES = 2.50; LPRE: ES = 1.60) and lower mean power (APRE: ES = 0.99; LPRE: ES = 0.54) over time in both groups compared to baseline. Following APRE, absolute leg press strength was significantly greater compared to LPRE (p = 0.04; ES = 2.41, ES = 1.36), while absolute chest press strength gains were similar between groups (p = 0.08; ES = 2.21, ES = 0.98). Skeletal muscle mass significantly increased similarly in both groups over time (APRE: ES = 0.46; LPRE: ES = 0.21), while there was no change over time or between groups for body fat %. APRE and LPRE were both effective at improving anaerobic power and skeletal muscle mass; however, APRE was more effective at improving lower body muscular strength in recreationally active males.
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