Validation and influence of anthropometric and kinematic models of obese teenagers in vertical jump performance and mechanical internal energy expenditure

Achard de Leluardière, F.; Hajri, L.N.; Lacouture, P.; Duboy, J.; Frelut, M.L.; Peres, G.

doi:10.1016/j.gaitpost.2005.01.002

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Volume 23, Issue 2 , Pages 149-158, February 2006

Validation and influence of anthropometric and kinematic models of obese teenagers in vertical jump performance and mechanical internal energy expenditure

F. Achard de Leluardière
- UMR 6610, Equipe étude mécanique du geste sportif, Laboratoire de Mécanique des Solides, faculté des sciences de Poitiers, SP2MI, Avenue Marie et Pierre Curie, Téléport 2, BP 30179, F86960 Poitiers Futuroscope, France
- Centre d’Analyse d’Image et de la Performance Sportive, Poitou-Charentes
- Corresponding author. Tel.: +33 5 49 49 67 56; fax: +33 5 49 49 65 04.
L.N. Hajri
- UMR 6610, Equipe étude mécanique du geste sportif, Laboratoire de Mécanique des Solides, faculté des sciences de Poitiers, SP2MI, Avenue Marie et Pierre Curie, Téléport 2, BP 30179, F86960 Poitiers Futuroscope, France
- Centre d’Analyse d’Image et de la Performance Sportive, Poitou-Charentes
P. Lacouture
- UMR 6610, Equipe étude mécanique du geste sportif, Laboratoire de Mécanique des Solides, faculté des sciences de Poitiers, SP2MI, Avenue Marie et Pierre Curie, Téléport 2, BP 30179, F86960 Poitiers Futuroscope, France
- Centre d’Analyse d’Image et de la Performance Sportive, Poitou-Charentes
J. Duboy
- UMR 6610, Equipe étude mécanique du geste sportif, Laboratoire de Mécanique des Solides, faculté des sciences de Poitiers, SP2MI, Avenue Marie et Pierre Curie, Téléport 2, BP 30179, F86960 Poitiers Futuroscope, France
- Centre d’Analyse d’Image et de la Performance Sportive, Poitou-Charentes
M.L. Frelut
- Hopital R. Debré, Paris, France
G. Peres
- Hôpital Pitié Salpêtrière, Paris, France

Received 13 April 2004; received in revised form 2 September 2004; accepted 13 January 2005. published online 08 April 2005.

Abstract

There may be concerns about the validity of kinetic models when studying locomotion in obese subjects (OS). The aim of the present study was to improve and validate a relevant representation of obese subject from four kinetic models. Fourteen teenagers with severe primary obesity (BMI=40±5.2kg/m²), were studied during jumping. The jumps were filmed by six cameras (synchronized, 50Hz), associated with a force-plate (1000Hz). All the tested models were valid; the linear mechanical analysis of the jumps gave similar results (p>0.05); but there were significantly different segment inertias when considering the subjects’ abdomen (p<0.01), which was associated with a significantly higher mechanical internal energy expenditure (p<0.01) than that estimated from Dempster's and Hanavan's model, by about 40 and 30%. The validation of a modelling specifically for obese subjects will enable a better understanding of their locomotion.