The combination of aerobic training and strength training is recognized as a more suitable exercise mode. At present, there is no clear conclusion about the influence of the sequence of aerobic and anaerobic training on fitness effect. In the completed research, the research on this content only stays on the effect of reducing fat, and the effect on physiological functions such as muscle is still inconclusive. In several studies of pure aerobic, pure anaerobic, aerobic priority and anaerobic priority, anaerobic priority and aerobic priority, the conclusion proves that the combined mode of anaerobic priority and aerobic priority has better weight loss effect under the same training intensity. From the point of view of metabolism, it may be because of the training mode of anaerobic first and aerobic second that lactic acid produced in anaerobic stage can be consumed through aerobic metabolism in aerobic stage. Judging from the weight loss effect, the early strength training may activate muscle function more comprehensively first, so that more energy can be consumed in the later aerobic training. Subjectively speaking, it may be because aerobic training will make the body more tired, resulting in the subsequent anaerobic exercise can not be carried out.