CLINICS

Clinics (Sao Paulo). 2017 May; 72(5): 272-275.
doi:10.6061/clinics/2017(05)03

Copyright © 2017 CLINICS

Muscle strength and body composition in severe obesity

Alexandre Vieira Gadducci I * , Roberto de Cleva I , Gabriela Correia de Faria Santarém I , Paulo Roberto Santos Silva II , Julia Maria D’Andréa Greve II , Marco Aurélio Santo I

Departamento de Gastroenterologia, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, BR

Instituto de Ortopedia e Traumatologia, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, BR

*Corresponding author. E-mail: alegadducci@hotmail.com

received October 7, 2016; revised December 21, 2016; accepted January 12, 2017.

Abstract

OBJECTIVE:

The aim of our study was to evaluate associations between maximum voluntary contraction torques of the lower limbs and body composition for subjects with severe obesity.

METHODS:

Body composition was evaluated by bioelectrical impedance analysis, and maximum voluntary contraction torques of the lower limbs were measured using an isokinetic dynamometer. One hundred thirty-two patients were enrolled (100 females and 32 males). Eighty-seven patients had a body mass index between 40 and 49.9 kg/m2 (the A group), and 45 patients had a body mass index between 50 and 59.9 kg/m2 (the B group).

RESULTS:

Absolute extension and flexion torques had weak associations with fat-free mass but a moderate association with absolute extension torque and fat-free mass of the lower limbs. There were no significant differences between the A and B groups with respect to absolute extension and flexion torques. For the A group, absolute extension and flexion torques were moderately associated with fat-free mass and with fat-free mass of the lower limbs. For the B group, there were only moderate associations between absolute extension and flexion torques with fat-free mass of the lower limbs.

CONCLUSIONS:

Our findings demonstrate that both groups exhibited similar absolute torque values. There were weak to moderate associations between absolute extension and flexion torques and fat-free mass but a moderate association with fat-free mass of the lower limbs. Individuals with severe obesity should strive for greater absolute torques, fat-free mass and especially fat-free mass of the lower limbs to prevent functional limitations and physical incapacity.

Keywords: Obesity, Body Composition, Muscle Strength


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