Kinematics of lower limbs of healthy Chinese people sitting cross-legged.
BACKGROUND
Sitting cross-legged as an activity of daily living and its kinematics have significantly different demands on the arthroplasty of hip and knee, which can be referred in the design of joint arthroplasty.


OBJECTIVE
The purpose of this study was to obtain the kinematics of the lower limb in Chinese people during cross-legged sitting.


METHODS
This study identified the necessary requirements for joint arthroplasty to carry out sitting cross-legged activity.


METHODS
A total of 40 healthy Chinese participants (average age = 23.8 years) performed six cross-legged sitting trials per person. Three-dimensional kinematic data of ankle, knee, and hip joints were collected; the means of the three-dimensional angles of these three joints were calculated.


RESULTS
At the hip, the range of motion of the flexion was 101.7°, the abduction reached 43.2°, and the range of motion of the external rotation was 36.4°. At the knee, the range of motion of the flexion was 131.9° and the range of motion of the internal rotation reached 32.4°. At the ankle, the range of motion in three planes was not great.


CONCLUSIONS
Such motion ranges were likely to result in prosthetic dislocation. The results would provide valuable references for prosthesis design in the Chinese population.
Institute of Biomedical Manufacturing and Life Quality Engineering, School of Mechanical and Power Energy Engineering, Shanghai Jiaotong University, Shanghai, China.
Hai
H
Zhou
Anmin
A
Liu
Dongmei
D
Wang
Xiangsen
X
Zeng
San
S
Wei
Chengtao
C
Wang
D000843:Ankle Joint / Q000502:physiology*; D044466:Asian People; D001696:Biomechanical Phenomena; D002681:China; D005260:Female; D006621:Hip Joint / Q000502:physiology*; D006622:Hip Prosthesis; D006801:Humans; D007595:Joint Prosthesis; D007719:Knee Joint / Q000502:physiology*; D007720:Knee Prosthesis; D035002:Lower Extremity / Q000502:physiology*; D008297:Male; D009068:Movement / Q000502:physiology; D011474:Prosthesis Design; D016059:Range of Motion, Articular / Q000502:physiology*; D055815:Young Adult
Sitting cross-legged; joint arthroplasty; kinematics; lower limbs