To compare the activation of GMed and TFL in four multi-joint exercises in strength training protocols and to verify if the level of muscle activation is indicated for strength gains in resistance training protocols. Methods: Eleven recreational lifters had normalized muscle activation of GMed and TFL assessed during ten maximal repetitions of four multi-joint exercises: (1) bilateral supine bridge (BiBRG); (2) bilateral supine bridge with hip abducted (BiBRG-AB); (3) unilateral supine bridge (UniBRG) and (4) single-leg squat (SLS). Results: A load of exercises was significantly greater for the BiBRG and BiBRG-AB compared to the UniBRG and SLS (p<0.001). We observed that GMed activation was significant greater compared to TFL among the four exercises (p=0.004) [BiBRG: Δ=26.2%; BiBRG-AB: Δ=27.3%; UniBRG: Δ=24.5% and SLS: Δ=18.8%]. Additionally, GMed activation was classified as moderate (<40%iMVC) and TFL activation was classified as low (<20%iMVC) in all exercises. Conclusion: Our results demonstrated that GMed is more active than TFL in all analyzed exercises. However, the level of activation observed for GMed was below that recommended to strength gain in resistance training programs.
Objective To verify if the functional capacity prior to COVID-19 infection was different between Survivor and Non-survivor older adults. Also, to verify the effect of the isolation period after COVID-19 infection on the functional capacity of the Survivors residing in nursing homes. Materials and methods Older adults residing in nursing homes were evaluated 30 days before the COVID-19 outbreak at the site for (i) general health characteristics (obtained from medical records); (ii) gait speed, handgrip strength and 30-s sitto-stand; (iii) sarcopenia and (iv) estimated muscle mass. Comparisons were made between Survivors and Non-survivors of COVID-19. After the isolation, the Survivors performed the assessments again. Results Twenty-one (81 ± 9.3 years) participants tested positive for COVID-19 and participated in the study, 12 survivors. No difference was observed between Survivors and Non-survivors in any of the outcomes evaluated. However, a moderate effect size was observed for handgrip strength, with lower values for the Non-survivors group (− 16%; d = 0.53). The isolation period reduced the number of sit-to-stand repetitions with moderate effect size in the Survivors (p = 0.046, g av = 0.66). Conclusion Although the null hypothesis analysis did not find significant differences between the groups, the effect size suggests that older adults residing in nursing homes who died from COVID-19 had lower handgrip strength. In the survivors, the isolation period after COVID-19 infection only negatively impacted the sit-to-stand performance.
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