This study investigated the effects of two different velocity-based training (VBT) regimens on muscular adaptations. Fifteen female college volleyball players were randomly assigned into either progressive velocity-based training (PVBT) or optimum training load (OTL). Both groups trained three times a week for seven weeks. PVBT performed a 4-week strength block (e.g., 0.55&ndash
0.70 m·
s&minus
1) followed by a 3-week power block (e.g., 0.85&ndash
1.0 m·
1), whereas OTL performed training at ~0.85&ndash
0.9 m·
1. 1RM and peak power output (PP) assessments on the back squat (BS), bench press (BP) and deadlift (DL) exercises were assessed pre and post training. There was a main time effect (p &le
0.05) for BS and BP 1RM, (PVBT: 19.6%, ES: 1.72
OTL: 18.3%, ES: 1.57) and (PVBT: 8.5%, ES: 0.58
OTL: 10.2%, ES: 0.72), respectively. OTL increased DL 1RM to a greater extent than PVBT (p &le
0.05), (OTL: 22.9%, ES: 1.49
PVBT: 10.9%, ES: 0.88). Lastly, there was a main time effect (p &le
0.05) for BS, BP and DL PP, (PVBT: 18.3%, ES: 0.86
OTL: 19.8%, ES: 0.79)
(PVBT: 14.5%, ES: 0.81
OTL: 27.9%, ES: 1.68)
(PVBT: 15.7%, ES: 1.32
OTL: 20.1%, ES: 1.77) respectively. Our data suggest that both VBT regimens are effective for improving muscular performance in college volleyball players during the offseason period.