Intervention outcomes of 24-week comprehensive exercise on knee isokinetic muscle strength in 45-59-year-old middle-aged population

Abstract

Objective To investigate the effects of the intervention protocol of 24-week comprehensive exercise on knee isokinetic muscle strength in middle-aged population. Methods Twenty-one males and 34 females aged 45-49 years were included in the study and underwent exercise intervention and isokinetic muscle strength measurement to determine indicators of the knee muscle group, which included flexion peak torque (FPT) , extension peak torque (EPT) , FPT/BW, EPT/BW, Flexor/Extensor (F/E) , flexion total work (FTW) , extensor total work (ETW) , flexion average power (FAP) , and extensor average power (EAP). Results The FPT (flexor) , FPT/BW (flexor) and EPT/BW (flexor) in male subjects were increased 14.18% vs. 11.52%, 16.39% vs. 15.57%, and 0.45% vs. 6.28% after received 60°/sexercise intervention at 16 and 24 weeks respectively, compared with those at baseline. Also, the indicators of F/E, FTW (flexor) and ETP (extension) showed a significant increase. All the above indicators in males were increased more significantly at 180°/s. The FPT (flexor) and FPT/BW (flexor) in female subjects were increased 29.48% vs. 29.76%, and 29.76% vs. 29.76% after received 60°/s exercise intervention at 16 and 24 weeks respectively, compared with those at baseline. In addition to EPT/BW (extension) and ETP (extension) , which had no significant changes at 180°/s, all the mentioned indicators in females were increased more significantly. Conclusion The 24-week comprehensive exercise can significantly improve the strength quality of knee muscle strength quality in middle-aged population. It can significantly promote the exercising of knee muscle group in middle-aged population. Key words: exercise intervention; isokinetic muscle strength; knee