The Effect Of 6-week Squat Jump With Kaatsu Training On Lower Limb Power Of Young Men

Abstract

Explosive power occupied an extremely important position in competitive sports, which was an important component of competitive ability. KAATSU Training, also known as Blood Flow Restriction Training (BFRT) was used to have compression bands and other pressure devices exert pressure on the upper and lower limbs and stimulate muscle cell swelling through temporary ischemia of distal muscles, which was a new physical training method causing muscle growth. KAATSU training was able to stimulate muscle growth and improve muscle fitness with a lower intensity load (20%-40%1RM). PURPOSE: This study aimed to investigate the effect of Squat Jump with KAATSU Training on lower limb power of young men. METHODS: Twenty young men volunteered to participate and were randomly assigned to a KAATSU group (BFT: n=10) and resistance group (CON: n=10). The BFT group performed weighted squat jump (30%1RM) with compression bands three times a week over 6 weeks; while the CON group undertook only weighted squat jump (30%1RM) three times a week during the same period. All participants were tested to assess the 1RM, squat jump, counter movement jump, Eccentric Utilization Ratio (EUR), the speed and power of squat jump. Comparisons between two groups were made using one-way ANOVA while comparisons in same group were made using paired t-test. RESULTS: Maximum strength (127.50±10.04 vs. 131.00±7.68kg, p<0.05), squat jump (54.27±2.89 vs. 56.88±2.57cm, p<0.05), counter movement jump (57.58±3.55 vs. 60.67±2.74), EUR (1.05±0.04 vs. 1.07±0.03), the mean speed (1.77±0.11 vs. 1.93±0.12m/s, p<0.05) and mean power (37.73±2.38 vs. 42.81±2.60W/kg, p<0.05) of squat jump in BFT showed a significant improvement after the intervention. The improvement of average speed (1.93±0.12 vs. 1.77±0.16m/s, p<0.05) and average power (42.81±2.60 vs. 41.56±6.53W/kg, p<0.05) of squat jump in BFT group were higher than that of the CON group after the intervention. CONCLUSIONS: KAATSU training is superior to traditional resistance training, but it cannot completely replace traditional resistance training in normal training in terms of improving movement speed and output power. KAATSU training can more effectively improve the movement quality of the half-squat jump, and can be used for training arrangements for rehabilitation after injury.