Produção Nacional
Revisado por pares
Echo intensity is associated with skeletal muscle power and cardiovascular performance in elderly men
2012; Elsevier BV; Volume: 47; Issue: 6 Linguagem: Inglês
10.1016/j.exger.2012.04.002
ISSN1873-6815
AutoresEduardo Lusa Cadore, Míkel Izquierdo, Matheus Conceição, Régis Radaelli, Ronei Silveira Pinto, Bruno Manfredini Baroni, Marco Aurélio Vaz, Cristine Lima Alberton, Stéphanie Santana Pinto, Giovani dos Santos Cunha, Martim Bottaro, Luiz Fernando Martins Kruel,
Tópico(s)Body Composition Measurement Techniques
ResumoThe purpose of the present study was to investigate the relationship between echo intensity, neuromuscular and cardiorespiratory performances in the elderly. Thirty-one healthy elderly men (65.5 ± 5.0) participated in this study. Echo intensity of rectus femoris and quadriceps femoris muscle thicknesses was determined by ultrasound images. Lower-body isometric and isokinetic peak torques (60, 180 and 360°.s−1), as well as rate of force development were evaluated as strength parameters. In addition, torque per unit of muscle mass was evaluated by the quotient between isometric peak torque of the knee extensors and the quadriceps femoris muscle thickness. The peak oxygen uptake (VO2peak), maximum aerobic workload (Wmáx), absolute (VT1 and VT2) ventilatory thresholds, as well as workloads at VT1 and VT2 (WVT1 and WVT2) were evaluated during a maximal incremental test on a cycle ergometer. There were significant negative correlations between the individual values of echo intensity with the corresponding individual values of isometric and isokinetic peak torques (60, 180 and 360°.s−1) (r = − 0.48 to r = − 0.64; P < 0.05), as well as with WVT1 (r = − 0.46) and WVT2 (r = − 0.50) (P < 0.05). In addition, significant positive correlations were observed between torque per unit of muscle mass and cardiovascular parameters (r = 0.52 to r = 0.60; P < 0.001). The present results suggest that the echo intensity analysis using computer-aided gray-scale analysis is a low cost, easily accessible, and a safe method to evaluate the muscle quality, and may contribute to the research of neuromuscular and cardiovascular performances in the elderly.
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