The Influence of Additional Trunk Load and Different Running Speeds on Six Degree of Freedom Kinematics of the Knee Joint
10.16156/j.1004-7220.2025.03.021
- VernacularTitle:躯干额外负重及不同跑速对膝关节六自由度运动学的影响
- Author:
Xiaofan HUANG
1
;
Juncong YANG
;
Ye LUO
;
Zhuman LI
;
Mengling HU
;
Shaobai WANG
Author Information
1. 上海市第五人民医院康复科,上海 200240;上海体育大学运动健康学院,上海 200438
- Publication Type:Journal Article
- Keywords:
six degrees of freedom;
weight bearing;
speed;
gait analysis;
knee joint
- From:
Journal of Medical Biomechanics
2025;40(3):677-683
- CountryChina
- Language:Chinese
-
Abstract:
Objective By exploring changes of six degrees of freedom(6DOF)kinematics of the knee joint during extra weight bearing of the body trunk,the influence of extra weight on knee joint movement patterns was studied.Methods A total of 24 healthy subjects were recruited to walk/run on a treadmill at four speeds under two states:self-weight and wearing a 16 kg vest,and gait analysis was conducted.A three-dimensional(3D)portable knee kinematics analysis system based on infrared stereophotography was used to capture 6DOF movement trajectory data of the tibia relative to the femur.Results Compared to the self-weight state,when additional trunk weight was added,the knee external rotation angle was reduced at 3.6 km/h speed(1.4°-2.1°)and 5.4 km/h speed(2.2°-2.7°);the knee internal rotation angle was reduced at 10.8 km/h speed(2.1°-4.2°);the knee flexion angles was increased significantly at the speed of 3.6 km/h(1.5°-1.8°),9 km/h(1.6°-3.3°)和 10.8 km/h(1.9°-3.1°);the knee adduction angle increased at 5.4 km/h speed(0.5°-0.6°),and decreased at 10.8 km/h speed(0.9°-1.3°).At 10.8 km/h speed,the distal knee displacement(0.2-0.4 mm)was increased,and the lateral knee displacement(0.1-0.2 mm),and anterior knee displacement(0.2-0.3 mm)were significantly reduced.Conclusions The 6DOF kinematics of human knee is significantly affected by the extra trunk weight.Performance is also different at lower and higher speeds.It is suggested that there may exist a hidden injury in military training,and this study provides a kinematic basis for the occurrence of sports injury.
