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| Effects of short-term Antarctic krill oil supplementation on the recovery of lower limbs muscle motor ability after resistance exercise |
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| DOI： |
| KeyWord:Antarctic krill oil resistance exercise lower limbs strength motor ability skeletal muscle |
| FundProject:中央高校基本科研业务专项资金资助项目(2020054)；横向联合项目(20191413，20210056) |
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| Abstract: |
| In order to investigate the effects of short-term Antarctic krill oil (AKO) supplementation on the recover of muscle motor ability of the human lower limbs after high-intensity resistance exercise, twenty-six male college students with special physical training were randomly divided into two groups: placebo (PL) group and AKO group. The PL group took 6 g soybean oil daily and the AKO group took the same dose of AKO for 7 d before the resistance exercise, and continued to take it until the end of the experiment. The resistance exercise scheme was as follows: the subjects were requested to complete 10 sets of 8 squats with 70% 1RM (one-repetition maximum), and the group interval was 3 min. After that, the subjects were requested to complete 5 sets of 20 bodyweight squat jumps, and the group interval was 3 min. Isokinetic muscle strength of the knee extensors and flexors, height of vertical jump, and 20-metre sprint were measured before resistance exercise and at 24, 48, 72 h after exercise. The results showed that in terms of lower limbs muscle endurance, there was no significant difference in the total work between AKO group and PL group at the speed of 240(°)/s (p>0.05); in terms of lower limbs muscle maximal strength, at the speed of 60(°)/s, the maximum work (MW) of the right knee extensors and flexors in AKO group, as well as the left knee flexors, were significantly higher than that in PL group after 72 h of exercise (p<0.05). After 48 h of exercise, the MW of the left knee extensors and flexors in AKO group were significantly higher than that in PL group (p<0.05); in terms of lower limbs muscle power, there was no significant difference in the height of vertical jump between AKO group and PL group (p>005); in terms of speed ability, there was no significant difference in 20-metre sprint time between AKO group and PL group (p>0.05). In conclusion, the short-term AKO supplementation can promote the recovery of muscle maximal strength in the lower limbs after high-intensity resistance exercise, and has no significant effects on the other muscle motor abilities. |
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