The effects of the functional garment on the biomechanics during the single leg drop landing

Shintarou Kudo; Toshinori Miyashita; Ayane Yamamoto; Syo Katayama; Raita Takasaki

doi:10.1016/j.jbmt.2023.06.010

The effects of the functional garment on the biomechanics during the single leg drop landing

J Bodyw Mov Ther. 2023 Oct:36:142-147. doi: 10.1016/j.jbmt.2023.06.010. Epub 2023 Jul 1.

Authors

Shintarou Kudo¹, Toshinori Miyashita², Ayane Yamamoto³, Syo Katayama⁴, Raita Takasaki⁵

Affiliations

¹ Inclusive Medical Sciences Research Institute, Morinomiya University of Medical Sciences, Osaka, Osaka, Japan; Graduate School of Health Sciences, Morinomiya University of Medical Sciences, Osaka, Japan; AR-Ex Medical Research Center, Tokyo, Japan. Electronic address: kudo@morinomiya-u.ac.jp.
² Inclusive Medical Sciences Research Institute, Morinomiya University of Medical Sciences, Osaka, Osaka, Japan.
³ Department of Rehabilitation, AR-Ex Oyamadai Orthopedics Clinic, Setagaya, Tokyo, Japan.
⁴ Department of Rehabilitation, Meidaimae Orthopedics Clinic, Setagaya, Tokyo, Japan.
⁵ Department of Acupuncture, Morinomiya University of Medical Sciences, Osaka, Japan.

PMID: 37949551
DOI: 10.1016/j.jbmt.2023.06.010

Abstract

Introduction: A functional biomechanics garment (FBG) may help to prevent injury by improved kinematics during motion such as single leg drop landing (SLDL). The purpose of this study was to investigate the effects of the FBG on the biomechanics of SLDL.

Method: Seventeen female university basketball players participated. Characteristics of the FBG were designed based on biomechanics during weight-loaded performance of human movement. The average values of lower limb kinematics and kinetics in the sagittal and frontal planes from 3 SLDL with and without FBG were measured and compared.

Results: The maximum varus angle of the knee showed a significant difference between the use of FBG (15.3 ± 15.1°) and without the use of FBG (5.9 ± 15.4°), the flexion angular displacement of the hip (with FBG, 21.5 ± 8.1°; without FBG, 24.0 ± 6.7°) between with and without FBG. The moment of the hip with FGB (1.1 ± 0.6 Nm) was significantly smaller than without FGB (1.4 ± 0.8 Nm).

Discussion: Regarding function of the FBG, the rigid part of the hip could counter the excessive adduction and flexion of the hip, and the elastic part of the thigh could support the varus moment when the elastic part stretched. Therefore, the subjects with FBG could control the frontal motion of the knee, which has a risk of knee injury, such as the dynamic valgus of the knee during the SLDL.

Conclusion: Use of the FBG decreases dynamic knee valgus, which reduces risk of knee injury.

Keywords: Dynamic knee valgus; Functional garments; Motion analysis; Single leg drop landing.

MeSH terms

Biomechanical Phenomena
Clothing
Female
Humans
Knee Injuries*
Knee Joint
Leg*
Lower Extremity