Biomechanical study of laterality and stability during double-leg landing of college competitive aerobics athletes
10.3969/j.issn.1000-6710.2024.04.003
- VernacularTitle:高校竞技健美操运动员落地偏侧性和稳定性的生物力学研究
- Author:
Lili WANG
1
,
2
;
Wan Ahmad Munsif Bin Wan Pa
;
Yuxuan WANG
;
Fenglei LI
;
Mengning JIE
;
Denise Koh Choon Lian
Author Information
1. 马来西亚国立大学教育学院(吉隆坡 43600)
2. 东华理工大学体育学院(南昌 330032)
- Keywords:
aerobics;
landing;
biomechanical;
laterality;
stability
- From:
Chinese Journal of Sports Medicine
2024;43(4):266-274
- CountryChina
- Language:Chinese
-
Abstract:
Objective To analyze the biomechanical characteristics of the landing movements of com-petitive aerobics athletes,compare the laterality between their dominant and non-dominant limbs,and to explore the primary factors influencing landing stability.Methods Taking 26 female aerobics athletes in universities as the research objects,their kinematics and kinetics data of double-leg vertical land-ing with the height of 40 cm were simultaneously recorded.A comparison was made between the two limbs in terms of joint angles at initial contact,range of motion(ROM)of joint,ground reaction force(GRF),load-rate,the displacement and envelope area of the center of pressure(COP).The symmetry index(SI),reflecting laterality,was computed,and a multiple stepwise regression analysis was conduct-ed to examine the correlation between parameter asymmetry and COP envelope area.Results Compared with the non-dominant limbs,the dominant limbs had significantly greater knee external rotation and hip abduction angle at initial contact(P<0.05),significantly greater ROM of the ankle and hip flexion-extension and hip adduction-abduction,and smaller ROM of ankle rotation during landing(P<0.05).Moreover,the peak knee extension moment of the dominant limbs was significantly higher than the non-dominant limbs(P<0.01).The SI of vertical load rate and peak knee extension moment were signif-icantly positively correlated with the COP envelope area(P<0.05).In addition,the SI of vertical load rate,peak knee extension moment and knee rotation angle could explain 83.6%of the difference in the COP envelope area.Conclusion There is laterality between the dominant and non-dominant limb of competitive aerobics athletes during landing:the greater laterality of the load rate and peak knee ex-tension moment,the worse the landing stability.Furthermore,the SI of vertical load rate,peak knee extension moment,and knee rotation angle can be used as predictors of the landing stability.
