The Effects Of Two Work-to-rest Ratios Of High-intensity Interval Training On Basic Physical Fitness In Male College Judo Athletes

BACKGROUND:Physical performance is an important factor affecting athletic performance and a basic guarantee for athletes to achieve excellent sports performance.The combination of the energy supply characteristics and time-motion characteristics of judo with high-intensity interval training is more in line with the energy metabolism requirements of judo and can also better improve the basic physical fitness of judo athletes.However,there is still a need to further improve the research on the effect of different work-to-interval ratios on athletes’basic physical fitness in HIIT.OBJECTIVE:To examine the effects of HIIT with a work-to-rest ratio of 3:1 and2:1 on the basal Physical fitness of male college judo athletes.METHODS:Using the literature review method,expert consultation method,experimental method and statistical analysis method,48 students of judo athletes in Guangzhou sport University were selected as subjects,all of whom were Level 2 or Level 1 athletes.The subjects were randomly assigned to one of the 3:1 group（2set,6reps,30 seconds of Judo specific exercise with 10 seconds of interval;n=16）,2:1group（2 set,6reps,20 seconds of Judo specific exercise with 10 seconds of interval;n=16）and the control group（n=16）,which only performed Judo specific training and experimental group filled in rating of perceived exertion after each training session.The intervention period was 6 weeks,with tests performed 1 week before and 1 week after the intervention,and the test indexes included Modified agility T-test,30-m sprint test,Countermovement jump,medicine ball put test,20-m Multistage shuttle run test,30-second Wingate test,and 3-,5-,10-,and 15-minute blood lactate tests after Wingate test,using repeated measures ANOVA to test the main and interaction effects of group and time for the test data,and the Bonferroni post hoc tests was applied to determine the significant simple effects.effect sizes were calculated using Cohen’s d and partial eta squared.RESULTS:After 6 weeks of high-intensity interval training with different work-to-interval ratios,there was a significant difference in rating of perceived exertion in the 3:1 group compared to the 2:1 group for weeks 1,2,3,4,5,and 6（p<0.05）.In the modified agility T-test,3:1 group（p<0.001;ES=-2.11）and 2:1 group（p<0.001,ES=-1.14）had a significant improvement,there are no significant differences between the two group;In the VO_2max,as derived from the 20 m Multistage shuttle run test,was significantly improved in both the 3:1 group（p<0.05;ES=0.46）and the 2:1 group（p<0.001;ES=0.88）,and was both significantly better than the control group in post-tests（p<0.05）.There were no significant differences between the two group.For the30 s Wingate test,there were significant improvements in peak power（ES=0.39）,mean power（ES=0.39）,peak power/kg（ES=0.56）,and mean power/kg（ES=0.50）were significantly higher（p<0.05）in the 3:1 group,and no significant improvement about these measurements in the 2:1 group.Further,there were no significant differences between the two group.In the blood lactate values at 5 minutes,there was a significant decline in the 3:1 group（p=0.029,ES=-0.58）and the 2:1 group significantly higher than the 3:1 group in the post-test（p=0.012）.In the post-test of blood lactate values at10 minutes,the 2:1 group significantly higher than the 3:1 group（p=0.005）.There were no significant differences between the 3:1 and 2:1 group in 30-m sprint,countermovement jump and medicine ball put.CONCLUSION:high-intensity interval training with a work-to-interval ratio of3:1 was effective in improving agility,aerobic,and anaerobic power in male college judo athletes,but possessed higher RPE during weekly training and reduced blood lactate buildup at 5 minutes after Wingate test.High-intensity interval training with a work-to-interval ratio of 2:1 showed greater improvements in agility and aerobic capacity only,and better improvements in aerobic capacity compared to the 3:1 group.