Quadricipite architecture evaluation with ultrasound, in an elderly population

Aging is associated with a progressive loss of neuromuscular function that often leads to a progressive disability and loss of independence. Degenerative processes begin to limit autonomy and functionality. Those processes is sarcopenia, defined as a gradual decline in muscle mass The aim of this study was to evaluate the muscle architecture, in an elderly population that practice exercise and a sedentary group, with the purpose of investigate the process of sarcopenia. Methods: Elderly people were evaluated, this evaluation was performed with an ultrasound, with 12 Mhz transducer. We evaluate both quadricipite muscles in contraction and in rest. A questionnaire was also per- formed for each individual in both samples. Informed consent was done. Main Results: Our results showed some differences in the muscle architecture in both groups. The main alteration was in the pennation angle that was higher in the exercised group. These differences altered the muscle performance. Conclusions: Muscular architecture is affected with disuse and sarcopenia. It is well known a relationship between performance, contractions and muscle architecture. Our results suggested that the atrophy directly affect muscles by reducing the volume and pennation angle. Thus, the effectiveness of strength training improves the structural and functional parameters of the skeletal muscle of elderly. ; info:eu-repo/semantics/publishedVersion