Statistical Parametric Mapping Analysis of Drop Jump Variability in Women with Generalized Joint Hypermobility
10.16156/j.1004-7220.2025.04.027
- VernacularTitle:基于统计参数映射分析女性全身关节过度活动中跳深运动变异性
- Author:
Long HUANG
1
;
Wenjuan JIANG
1
;
Lei LI
1
;
Chen LI
1
;
Ye LIU
1
Author Information
1. 北京体育大学运动人体科学学院,北京 100084
- Publication Type:Journal Article
- Keywords:
generalized joint hypermobility;
movement variability;
drop jump;
statistical parametric mapping
- From:
Journal of Medical Biomechanics
2025;40(4):996-1004
- CountryChina
- Language:Chinese
-
Abstract:
Objective Based on statistical parametric mapping(SPM),to analyze the variability characteristics of lower limb in females with generalized joint hypermobility(GJH)during drop jump.Methods Fifteen females with GJH(GJH group)were recruited based on the Beighton scores,and 15 healthy females(control group)were matched.Kinematic and kinetic data were synchronously collected using the Qualisys infrared motion capture system and Kistler three-dimensional(3D)force platform.Joint angles and torques were computed using OpenSim.Custom Matlab scripts were used to calculate the standard deviation curves of joint angles,and SPM was applied to analyze differences in movement variability between the two groups during the eccentric,coupling,and concentric phases of drop jumps.The maximum joint flexion angles and torques(mean and standard deviation)were calculated to support the findings,and effect sizes were evaluated using Cohen's d.Results Significant differences were observed between the two groups during various phases of drop jumps.In all statistically significant periods,the GJH group exhibited higher joint angle standard deviations compared to the control group(P＜0.05).Differences were primarily concentrated in joint flexion movements.During the coupling phase at different heights,the standard deviation of knee joint flexion angles in GJH group consistently exceeded that of control group(P＜0.001).Discrete variables showed significant differences in the standard deviation of the maximum knee flexion angles at different heights:At 30 cm,P=0.001,Cohen's d=2.520;at 40 cm,P=0.014,Cohen's d=1.739;and at 50 cm,P=0.005,Cohen's d=1.768.No significant group differences were found in the mean values or standard deviations of the maximum joint flexion angles and torques.Conclusions Females with GJH exhibit higher movement variability during drop jumps compared to healthy females,particularly in knee flexion movements during the coupling phase.Excessive variability reflects insufficient motor control,reducing their ability to resist external disturbances and leading to high-risk movement patterns(e.g.,excessive flexion or knee valgus).
