Fig. 2From: Assessment of isokinetic trunk muscle strength and its association with health-related quality of life in patients with degenerative spinal deformityThe velocity-changing trend diagram of isokinetic strength of trunk muscle. Illustration: a The trunk flexor and extensor PT in the control group were always higher than that in the DSD group, the trends of flexor PT growth of two groups were basically the same and the extensor PT in the control group maintained an increasing trend, while there is a mild downturn for extensor PT from the speed of 30°/s to 60°/s in the DSD group. b The F/E ratio in the control group was stable between 0.9 and 1.1, while the F/E ratio maintained an increasing trend from 1.1 to 1.5 in DSD group. PT: peak torque; DSD: degenerative spinal deformity; F: flexion; E, extensionBack to article page