AUTHOR=Jiang Dongting , Xu Gang 

TITLE=Effects of chains squat training with different chain load ratio on the explosive strength of young basketball players’ lower limbs

JOURNAL=Frontiers in Physiology

VOLUME=Volume 13 - 2022

YEAR=2022

URL=https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2022.979367

DOI=10.3389/fphys.2022.979367

ISSN=1664-042X

ABSTRACT=The purpose of this study was to explore the effects of the chain squat training (CST) with different chain load ratio (0, 10%, 20% and 30%) on the explosive power of the lower limbs of adolescent male basketball players. Forty-four youth basketball players were averaged and randomly assigned to one of the four groups: traditional squat training (TST), 10% chains squat training (10%CST), 20% chains squat training (20%CST), and 30% chains squat training (30%CST). Training interventions were performed 2 times per week for 6 weeks, and at the week before (Pre) and after (Post) the 6-week CST program with different chain load ratio, the 1RM squat, standing long jump, no-step vertical jump, 15m shuttle run and 30m sprint test were performed. A 4 (group) × 2 (time) repeated measures analysis of variances (ANOVA) was calculated to show the scatter of each variable, and the Bonferroni’s post-hoc test was used for multiple comparisons, in addition the partial eta-squared (η²) was calculated as an estimate of the ES. Significant time × group interaction was noticed from the 1RM squat (P<0.01; η²=0.333), standing long jump (P<0.001; η²=0.490) and no-step vertical jump (P<0.001; η²=0.611) indicating that better improvements appear in CST compared to TST. However, significant time × group interaction was noted for 15m shuttle run (P<0.001; η²=0.428), in favor of TST compared to CST. In addition, the improvements in 30m sprint were similar between all groups. In conclusion, CST with more chain load has better training effects on lower limb explosive strength and maximum strength, based on the improvement of neural adaptability. Besides, CST with less chain load provides more sufficient eccentric load for the muscle, which is more beneficial to the improvement of basic strength and hypertrophy.