Normalized muscle EMG activity during squatting

1. Sit-to-stand exercise decreases normalized muscle EMG activity during squatting in humans (67.2 ± 17.2% at baseline, 49.3% at week 4, 43.5 ± 7.7% at week 12).

   “QF %EMGmax decreased from 67.2 ± 17.2% to 49.3% at week 4 (P < 0.001) and 43.5 ± 7.7% at week 12 (P = 0.016).”

   Human trialphysically frail eldersrectus femoris and vastus lateralis muscles48 repetitions/session, 3 sessions/week12 weeksn = 14

   Repeated sit-to-stand exercise enhances muscle strength and reduces lower body muscular demands in physically frail elders

   Experimental gerontology·Dec 27, 2018

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1. Body mass-normalized knee extension torque is associated with normalized muscle EMG activity during squatting in humans (r = -0.78 to -0.86, P ≤ 0.001).

   “At each of the three measurement time points KET/BM was inversely correlated with QF %EMGmax (r = -0.78 to -0.86, P ≤ 0.001).”

   Human trialphysically frail eldersrectus femoris and vastus lateralis musclesbaseline, week 4 and week 12n = 14

   Repeated sit-to-stand exercise enhances muscle strength and reduces lower body muscular demands in physically frail elders

   Experimental gerontology·Dec 27, 2018

More on Body mass-normalized knee extension torque