Fig. 3
From: Muscle function and fatigability of trunk flexors in males and females
Torque steadiness of trunk flexion at different intensities of contraction. Mean (±SEM) torque fluctuations for males and females represented as the standard deviation (SD) of torque and the coefficient of variation (CV) of torque, at 5, 10, 20, 50, and 70% of maximal voluntary contraction (MVC) in upright sitting. Torque steadiness differed with contraction intensity for SD and CV, but there were no differences between males and females