Article

The internal joint contact forces experienced at the lower limb have
been frequently studied in activities of daily living and rehabilitation
activities. In contrast, the forces experienced during more dynamic activities
are not well understood, and those studies that do exist suggest very high
degrees of joint loading. METHODS: In this study a biomechanical model of the
right lower limb was used to calculate the internal joint forces experienced by
the lower limb during vertical jumping, landing and push jerking (an explosive
exercise derived from the sport of Olympic weightlifting), with a particular
emphasis on the forces experienced by the knee. FINDINGS: The knee experienced
mean peak loadings of 2.4-4.6xbody weight at the patellofemoral joint,
6.9-9.0xbody weight at the tibiofemoral joint, 0.3-1.4xbody weight anterior
tibial shear and 1.0-3.1xbody weight posterior tibial shear. The hip experienced
a mean peak loading of 5.5-8.4xbody weight and the ankle 8.9-10.0xbody weight.
INTERPRETATION: The magnitudes of the total (resultant) joint contact forces at
the patellofemoral joint, tibiofemoral joint and hip are greater than those
reported in activities of daily living and less dynamic rehabilitation exercises.
The information in this study is of importance for medical professionals, coaches
and biomedical researchers in improving the understanding of acute and chronic
injuries, understanding the performance of prosthetic implants and materials,
evaluating the appropriateness of jumping and weightlifting for patient
populations and informing the training programmes of healthy populations.
CI - Copyright (c) 2012 Elsevier Ltd. All rights reserved.

Langue : ANGLAIS