Article

The purpose of this study was to determine how an overweight or obese child's
cardiorespiratory fitness level and a state of fatigue affect gait biomechanics.
METHODS: Using a three-dimensional motion analysis system, twenty-nine (female
and male) overweight and obese children aged 8-11 years walked on force plates
before and after being fatigued from the Progressive Aerobic Cardiovascular
Endurance Run (PACER) protocol. Joint moments were calculated for the knee and
hip in the frontal and sagittal planes. RESULTS: In a non-fatigued state, peak
hip and knee adductor moments showed a negative relationship with
cardiorespiratory fitness level (R2=0.26, 0.26). After the subjects were
fatigued, peak hip extensor (p=0.02), peak knee extensor moments (p=0.02) and
peak knee adductor moments (p=0.01) showed a significant increase. CONCLUSION:
This trend illustrates that as an overweight or obese individual's fitness
improves, the lower limb joint moments in the frontal plane decrease when
walking. However, with the introduction of cardiorespiratory fatigue, lower limb
joint moments tend to increase in the frontal and sagittal planes. Increased
joint stress may have potential implications for obese children performing
physical activity, as well as for clinicians who are attempting to intervene in the cycle of obesity.
CI - Copyright (c) 2016 Elsevier B.V. All rights reserved.

Langue : ANGLAIS