Effects Of Different Induction Methods On Lower Limb PAP Effect Of Basketball Players Under Blood Flow Restriction

Research purpose: This study aims to explore the influence of different types of resistance exercises under blood flow restriction on the post activation potentiation of basketball athletes’ lower limbs by implementing three different schemes for basketball special sports,including traditional high-intensity squat,blood flow restriction combined with traditional low-intensity squat,and blood flow restriction combined with low-intensity pneumatic squat exercise.Research methods: 11 male college students majoring in basketball in Wuhan Institute of physical education were selected.Before the experimental intervention,the half squat 1RM of each subject was tested,and the 25% and 90% 1RM loads of each subject were recorded.The left and right thigh circumference of the subject was measured to determine the pressure of blood flow restriction.After that,each subject needs to complete the blood flow restriction combined with low-intensity traditional resistance squat exercise（pressure bands combine with traditional barbell,25% 1RM,70 in total,completed in 3 groups,20 in the first group,15 in the second group and 15 in the third group,with an interval between groups was 1 minute）,the traditional high-intensity resistance half squat exercise（traditional barbell,90% 1RM,a total of 5 times,with an interval of 1 minute）,Blood flow restriction combined with low-intensity air resistance half squat exercise（pressure bands combine with Keiser training instrument,25%1RM,70 in total,divided into 3 groups,20 in the first group,15 in the second group and 15 in the third group,with an interval between groups was 1 minute）,and the results of reverse counter movement jump（CMJ）were measured before and 15 s,4,8,12 and 16 minutes after the intervention.Results:（1）Results :（1）blood flow restriction combined with traditional low intensity group induced significant increase of PAP at 4 min and 8 min,showing a significant increase of 4.598% at 4 min（p < 0.01）and 1.839% at 8 min（p < 0.05）.The peak power increased by5.001% at the 4th minute（P < 0.05）,and increased by 10.22% at the 8th minute（P < 0.01）.（2）The traditional high-intensity group had significant PAP effect after 4 min,which was 3.226%higher than the baseline（P < 0.01）;Compared with the baseline value,the peak power increased by 5.436%,which was extremely significant（P < 0.01）.（3）In the blood flow restriction combined with pneumatic resistance group,there was a significant increase in PAP at 4,8 and12 min,and elevation height at 4 and 8 min was significantly increased by 3.678% and 6.667%（P < 0.01）,and at 12 min it was significantly increased by 3.448%（P < 0.05）.The peak power increased by 7.972% and 8.919% at the 4th and 12 th minute,respectively,showing a significant increase（P < 0.05）,and increased by 12.919% at the 8th minute,showing a very significant increase（P < 0.01）.Conclusions:（1）traditional high-intensity squat,blood flow restriction combined with traditional low-intensity squat and blood flow restriction combined with low-intensity air resistance squat can produce PAP effect.（2）The PAP induced by blood flow restriction combined with low-intensity pneumatic resistance squat is better than that induced by blood flow restriction combined with traditional low-intensity squat and superior to traditional highintensity exercise.（3）The PAP effect induced by blood flow restriction combined with lowintensity air resistance squat exercise is the most significant and lasts the longest,and the significance lasts for 4-12 minutes.（4）Blood flow restriction combined with low-intensity pneumatic resistance training can be an effective alternative to traditional high-intensity induced PAP.