In the present intervention study, low-velocity-loss (LVL) versus high-velocity-loss (HVL) thresholds in the squat and bench press were compared for changes in muscle strength, power, and hypertrophy. Methods: Strength-trained volunteers (7 and 9; age: 27.2 [3.4] y; height: 174.6 [8.0] cm; body mass: 75.3 [10.1] kg) were randomized into an LVL or HVL threshold group (LVL n = 3 + 5, and HVL n = 4? + 4?). Training took place 3 times per week over 6 weeks (loads: ~75%-90% of 1- repetition maximum [1RM]). The thresholds of LVLs and HVLs were set at 20% and 40% of maximal velocity, respectively, for the squat, and at 30% and 60%, respectively, for the bench press. Before and after the intervention, 1RM, leg press power, and squat jump were tested. The load (~45% of 1RM) corresponding to 1-m/s velocity was assessed in all sessions for both exercises. In addition, the thickness of the vastus lateralis and triceps brachii and body composition (dual-energy X-ray absorptiometry [DEXA]) were measured. Results: Squat and bench-press 1RM increased similarly in both groups by 7% to 11% (SD: 4%-6%, P < .05). No group differences were obs srved for changes in jump height, leg press power, or DEXA lean mass. However, HVL showed a small increase in muscle thickness of the vastus lateralis compared with LVL (6 ± 6% [95% CI] group difference, P < .05). Conclusion: For strength-trained individuals, high-volume lower-velocity-loss thresholds were as effective as higher thresholds for improvements in 1RM strength; but local hypertrophy was seemingly elicited faster with higher velocity-loss thresholds. Erratum. TO OUR READERS: An error appeared in the ahead-of-print version of the following article: Myrholt RB, Solberg P, Pettersen H, Seynnes O, Paulsen G. Effects of low- versus high-velocity-loss thresholds with similar training volume on maximal strength and hypertrophy in highly trained individuals In Table 2, the unit of measure for vastus lateralis and triceps brachii thickness was listed as centimeters when it should have been millimeters. The article was corrected February 20, 2023. The authors apologize for the error.
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