Volume Load and Training Intensity With and Without Exercise Displacement
PURPOSE: Controlling and monitoring volume load (VL) and training intensity (TI) is essential to managing injuries, fatigue and the recovery-adaptation process in competitive athletes. Conventional calculations of VL (sets x reps x load) and TI (VL/reps) give no consideration to barbell displacement during resistance training exercises. The purpose of this investigation was to determine whether the inclusion of displacement in VL and TI calculations would provide substantial benefits over conventional calculations of VL and TI. METHODS: Eight trained weightlifters (5 male, 3 females, 173.6 cm and 88.6 kg), 7 of which were national level, participated in the study. For each subject, a V-scope 120 was used to measure the concentric phase displacement of 24 different exercises performed during the study. VL, TI, VL with displacement (VLwD) and TI with displacement (TIwD) were calculated on a daily basis (VLwD= VL x displacement, TIwD = VLwD/reps). Loads and repetition counts were recorded for each exercise performed over 21 weeks of training which allowed for the calculation of VL, VLwD, TI and TIwD across several training phases. RESULTS: VL correlated strongly to VLwD (r=0.98) while TI also correlated strongly with TIwD (r=0.88). CONCLUSIONS: Results suggest that if exercise selection remains consistent, measuring VL and TI without displacement can illustrate workloads similar to measuring VL and TI while factoring in displacement.
Hornsby, William G.; Gentles, Jeremy A.; Miller, Jonathan A.; and Stone, Michael H.. 2013. Volume Load and Training Intensity With and Without Exercise Displacement. Poster Presentation. Southeast American College of Sports Medicine Annual Meeting, Greeneville, SC. https://www.acsm.org/docs/default-source/regional-chapter-individual-folders/southeast/p_2013