Objective Sport therapy can be divided into two ways，active exercise and passive exercise. Different forms of exercise can lead to different effect. However，in the process of exercise therapy，the actual way of exercise may be different from the planned，because the patients have their own understanding and control deviation of strength，which may lead to an unreasonable independent participation. The study taking young people as the object of study，aims to establish an objective and characteristic index which can judge the way of sport therapy in order to analyze and evaluate the patient’s exercise，and then，correct the deviation caused by patients’ independent participation. Methods Twenty-four healthy participants aged 20-30years (twelve men and twelve women) were trained on the bike in different way of exercise. The speed was 30r/min，and the duration was 3 min. In the process of exercise，the plantar pressure measurement system was used to record plantar pressure，and electrical measuring system was used to record the amplitude of gastrocnemius muscle signal. Results Under different motion modes，The gastrocnemius muscle EMG peak，integral EMG and variance，the AD value have a clear demarcation and extremely significant differences (P<0.01). The gastrocnemius muscle EMG variance and maximum value of plantar pressure have a clear demarcation and significant differences (P<0.05). These results were not influenced by gender differences. Conclusions In different ways of motion，the peak value of the muscle electrical signal，the AD value and the maximum value of plantar pressure have a clear demarcation，and possibly can be used as an objective index to evaluate the active and passive exercise of young people’s lower limbs.