The effect of relative load on barbell velocity and perceived exertion when a 25% velocity loss threshold is applied to sets of bench press
DOI:
https://doi.org/10.12922/6arsem64Keywords:
momentary failure, set end point, fatigue, repetitions in reserveAbstract
This study’s purpose was to assess the effect of relative intensity on perceived exertion and barbell velocity during sets of bench press performed to a velocity loss (VL) threshold of > 25%. Twenty recreationally trained subjects (18-40 yrs.) completed five sets of bench press under three conditions: ascending pyramid, descending pyramid, and constant load. Sets were performed until VL of >25% was achieved and mean/peak velocity of every repetition was recorded. Rating of perceived exertion/repetitions in reserve (RPE/RIR) for each set was measured. This study provides data analyses in which sets performed with 65-70-75-80-85% 1-RM were consolidated. Data revealed significant main effects for repetition volume, barbell velocity (mean, peak, start, and end), measured VL, and RPE/RIR (p ≤ 0.05). Post-hoc comparisons indicated that repetition volume, barbell velocity (mean, peak, start, and end) significantly decreased as relative intensity increased (p ≤ 0.05). Measured VL and RPE/RIR significantly increased as relative intensity increased (p ≤ 0.05). Several significant relationships were observed between relative intensity, relative strength ratio, repetitions completed, measurements of barbell velocity, and RPE/RIR (p ≤ 0.05). In conclusion, relative intensity influences several aspects of barbell velocity and RPE/RIR. As relative intensity increased RPE/RIR and VL increased incrementally despite the application of a fixed VL threshold.
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