The results of this study indicate that substantial muscle gains with relatively set volumes in young, trained lifters even when reducing their previous set volume. Furthermore, training to failure during single-set routines led to greater improvements in some measires of hypertrophy and power, although the differences in strength and endurance were similar between groups. However, training to failure seemed to slightly favor muscle growth compared to 2-RIR. Additionally, resistance-trained individuals with little to no experience using RIR apear able to sarisfactory estimate their 2 RIR in the bench press and back squat after receiving a brief explanation of the concept, andpredictive ability is enhanced after an 8-week training program. References: https://sportrxiv.org/index.php/server/preprint/view/484
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