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Abstract

Resistance training (RT) is recommended for elderly with the objective to increase muscle strength and power trough neuromuscular adaptations, inducing increased motor and functional capacities. The electromyography (EMG) is an important instrument to analyze muscle function after diverse exercise training protocols. The objective of the present study was to analyze electromyographic activity of vastus lateralis oblique muscle (VLO) during maximal voluntary isometric contraction of elderly women submitted to 12 weeks of periodized RT. 16 women aged 65.5±3.6 years with a minimum of one year of previous experience in strength training were selected, they performed 24 sessions of RT divided in 3 mesocycles (MA, MB and MC), of 8 sessions each, with a session frequency of twice a week. The MA with light intensity, the MB moderate and the MC with high intensity. Training intensity was measured by the Borg perception scale. For statistical analysis a p<0.05 was assumed. There was a significant increase in root mean square (RMS) at 90º of knee flexion after 12 weeks (T2) compared with T1 (baseline), measured by VLO muscle EMG. Periodized RT in elderly women is efficient in increasing muscle force, induced by an increase in muscle fiber depolarization.

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