Abstract
[Purpose] This study aimed to clarify the correlations between the kinematics of the pre-landing flight phase and ground reaction force during single-leg anterior jump-landing. [Subjects and Methods] Fifteen healthy adults were included in the study. The sagittal angles of the trunk, pelvis, and lower extremities were measured 50 msec before initial contact and during landing using a movie camera. The ground reaction force parameters were measured using a force plate. [Results] The median angle (quartile deviation) was 11.5° (2.5°) for the anterior trunk tilt, 28.9° (6.4°) for the hip flexion, 5.9° (5.1°) for the anterior pelvic tilt, and 22.5° (3.9°) for the knee flexion at 50 msec before initial contact. The median value for the peak posterior ground reaction force was 60.3%BW (7.3%BW). Some sagittal angles at the 50 msec before initial contact were related to the peak posterior ground reaction force. [Conclusion] In single-leg anterior jump-landing, increasing anterior trunk tilt, hip flexion, and anterior pelvic tilt before landing might diminish the posterior ground reaction force.
