Applying sessionRPE and objective indexes to evaluate and analyze physiological workload intensity (PWI) of yoga class, this research provide theoretical foundation for promoting quality of teaching. The results show that the curve presents high in the middle and low on both ends, which is in keeping with human physiological trait; sRPE is significantly correlated with HR, while there’s low correlation between sRPE and SpO2. As a result, sRPE is a simple effective index for evaluating the internal PWI of yoga, which is the supplementary of objective physiological indexes, such as HR.