Key result
High-load blood flow restriction training increases leg strength ~29% and improves jumping versus low-load training.
Why the study?
The study was conducted to examine the effect of blood flow restriction resistance training under different external loads on muscle strength and vertical jumping performance in volleyball players.
Does blood flow restriction resistance training under different external loads improve muscle strength and vertical jumping performance in well-trained volleyball players?
RCT (n=18)
Open-label
Randomly assigned
No
Does blood flow restriction resistance training under different external loads improve muscle strength and vertical jumping performance in well-trained volleyball players?
Absolute Event Rate: 28.6% vs 9.9%
p-value: p=0.019
High-load blood flow restriction resistance training increases muscle strength and vertical jumping performance to a greater extent compared to low-load blood flow restriction and high-load resistance training without restriction in volleyball players.
This is the authors' abstract. We don't add key points for this paper.
Purpose To examine the effect of blood flow restriction resistance training under different external loads on the muscle strength and vertical jumping performance in volleyball players. Methods 18 well-trained collegiate male volleyball players were randomly divided into 3 groups: high-load resistance training group (HL-RT, 70% 1RM, n = 6), low-load blood flow restriction resistance training group (LL-BFR-RT, 30% 1RM, 50% arterial occlusion, n = 6), and high-load blood flow restriction resistance training group (HL-BFR-RT, 70% 1RM, 50% arterial occlusion, n = 6). Participants performed leg half-squat exercise 3 times per week for 8 weeks. Measurements of Isokinetic peak torque of knee extension and flexion, 1RM leg half-squat, squat jump, and 3 footed take-off were obtained before and after training. A two-way repeated-measures analysis of variance was used to examine differences among the 3 groups and between the 2 testing time (pre-test vs post-test). Results (1) The HL-RT group was significantly greater in muscle strength than that in the LL-BFR-RT group ( P < .05), but no improvement in vertical jumping performance ( P >.05). (2) Improvement in muscle strength and vertical jumping performance was significantly greater in the HL-BFR-RT group than that in the LL-BFR-RT group ( P <.05). (3) The HL-BFR-RT group had greater but not significant improvement in muscle strength and vertical jumping performance than that in the HL-RT group. Conclusions Although increases in muscle strength were observed between training groups, HL-BFR-RT increased not only muscle strength but vertical jumping performance to a greater extent compared to LL-BFR-RT and HL-RT.
Supports high-load over low-load BFR for strength and jumping gains in volleyball players; extends dose-response RCT evidence on BFR training.
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Wang et al. (2022) conducted an RCT in Healthy well-trained collegiate male volleyball players (n=18). High-load blood flow restriction resistance training (HL-BFR-RT) vs. Low-load blood flow restriction resistance training (LL-BFR-RT) and High-load resistance training (HL-RT) was evaluated on 1RM leg half-squat increase (p=0.019). High-load blood flow restriction resistance training increased 1RM leg half-squat by 28.6% and significantly improved vertical jumping performance compared to low-load blood flow restriction training.
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