Comput Math Methods Med - The application of computer musculoskeletal modeling and simulation to investigate compressive tibiofemoral force and muscle functions in obese children.

Tópicos

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Resumo

This study aimed to utilize musculoskeletal modelling and simulation to investigate the compressive tibiofemoral force and individual muscle function in obese children. We generated a 3D muscle-driven simulation of eight obese and eight normal-weight boys walking at their self-selected speed. The compressive tibiofemoral force and individual muscle contribution to the support and progression accelerations of center of mass (COM) were computed for each participant based on the subject-specific model. The simulated results were verified by comparing them to the experimental kinematics and EMG data. We found a linear relationship between the average self-selected speed and the normalized peak compressive tibiofemoral force (R (2) = 0.611). The activity of the quadriceps contributed the most to the peak compressive tibiofemoral force during the stance phase. Obese children and nonobese children use similar muscles to support and accelerate the body COM, but nonobese children had significantly greater contributions of individual muscles. The obese children may therefore adopt a compensation strategy to avoid increasing joint loads and muscle requirements during walking. The absolute compressive tibiofemoral force and muscle forces were still greater in obese children. The long-term biomechanical adaptations of the musculoskeletal system to accommodate the excess body weight during walking are a concern.

Resumo Limpo

studi aim util musculoskelet model simul investig compress tibiofemor forc individu muscl function obes children generat d muscledriven simul eight obes eight normalweight boy walk selfselect speed compress tibiofemor forc individu muscl contribut support progress acceler center mass com comput particip base subjectspecif model simul result verifi compar experiment kinemat emg data found linear relationship averag selfselect speed normal peak compress tibiofemor forc r activ quadricep contribut peak compress tibiofemor forc stanc phase obes children nonobes children use similar muscl support acceler bodi com nonobes children signific greater contribut individu muscl obes children may therefor adopt compens strategi avoid increas joint load muscl requir walk absolut compress tibiofemor forc muscl forc still greater obes children longterm biomechan adapt musculoskelet system accommod excess bodi weight walk concern

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