Effect of half squat training with blood flow restriction under different external load on strength and power of well-trained volleyball players

Oral Presentation

Abstract

^{Purpose: To examine the effect of blood flow restriction training under different external load on strength and power of volleyball players. Methods: eighteen participants were divided into 3 groups. One group(low load with blood flow restriction, LL-BFR,n=6) completed squat with 30% 1RM for 4 sets with 30 repetitions performed in the first set and 15 repetitions performed in the following 3 sets. The following two groups(high load with blood flow restriction,HL-BFR,n=6; high-intensity resistance training,HI-RT;n=6) completed squat with 70% 1RM for 4 sets with 8 repetitions . Each set was separated by 60 seconds of rest. Results：1)There was no significant difference between LL-BFR and HI-RT on strength and vertical jumping (P > 0.05). 2) Under the same arterial occlusion, compared with LL-BFR, HL-BFR can significantly increase strength and power (P < 0.05); 3) Under the same heavy external load(70%1RM), there was no significant difference between HL-BFR and HI-RT on strength and power (P > 0.05). Conclusion: the effect of LL-BFR on strength of volleyball players can achieve the same effect of  HI-RT; Under the same arterial occlusion, in a certain range, the higher the external load, the better the effect on strength and power; Under the same heavy external load, the effect of blood flow restriction resistance training on strength and power is equivalent to that of no blood flow restriction resistance training.}