Abstract: Muscle strength training can effectively reduce muscle atrophy, activate muscle tissue and promote muscle strength recov-ery and growth. Based on our previous research, we developed four muscle strength training strategies by further imitatingthe clinical muscle strength training methods, namely, Isokinetic centriPetal-centriPetal Exercise (IPPE), Isokinetic cen-triPetal-centriFuge exercise (IPFE), Isokinetic centriFuge-centriPetal Exercise (IFPE) and Isokinetic centriFuge-centriFuge Exercise (IFFE). To quantitatively evaluate the performance of the developed strategies, experiments were carried out with elbow and knee joints as examples, and muscle Endurance Ratio (ER), Flexion and Extension torque ratio (F/E) and the degree of muscle activation were extracted and calculated based on angle/torque and Surface ElectroMyoGraphy (sEMG) signals. Experimental results showed that the ER value of IFFE was significantly reduced compared with IPPE, while the F/E value of IFPE was significantly increased; this suggests that muscle centrifugation corresponds to higher trainingintensity; In addition, flexor and extensor muscle groups showed different levels of muscle activation in different train-ing strategies. The results reveal that combining different muscle movement characteristics, isokinetic exercise can exert special muscle strength training effects. The study can lay the foundation for exploring subject-specific adaptive muscle strength training strategies to better adapt to different levels of muscle strength.

Key words: Muscle strength training')">Muscle strength training, Degree of muscle activation, Angle/torque information, Performance evaluation