Electromyographic activity and 15RM load during resistance exercises on stable and unstable surfaces.

Resumo
The purpose of this study was to compare electromyographic (EMG) activity and a 15-maximum repetition (15RM) load in bench press (BP) and free squat (FS) on a stable surface (SS) and an unstable surface (US). Nineteen healthy men (age 24.65 ± 3.48 yrs) volunteered for five testing sessions. The load value for the FS on the SS was higher than on the US (83.9 ± 18.67 kg vs. 70.3 ± 10.07 kg, P=0.001). No significant difference was observed between BP on either surface to load value (66 ± 10.15 kg vs. 64.2 ± 8.63 kg, P=0.231). For EMG, no significant differences were observed in the anterior deltoid (0.52 ± 0.13 vs. 0.65 ± 0.42, P=0.06), pectoralis major (0.40 ± 0.44 vs. 0.30 ± 0.21, P=0.14), biceps femoris (0.09 ± 0.08 vs. 0.08 ± 0.06, P=0.50), or vastus lateralis (0.34 ± 0.21 vs. 0.34 ± 0.22, P=0.76) between conditions. Thus, the findings indicate that an US produces similar muscle activation as a SS produce using lower loads.
Descrição
Palavras-chave
Strength, Instability
Citação
ARANDA, L. C. et al. Electromyographic activity and 15RM load during resistance exercises on stable and unstable surfaces. Journal of Exercise Physiology Online, n. 1, v. 19, p. 114-123, fev. 2016. Disponível em: <https://www.asep.org/index.php/resources/jep-online/>. Acesso em: 05 ago. 2017.