Circadian Rhythm and Personalized Exercise

Almost all physiological and biochemical processes in the human body follow a circadian rhythm. Studies have found that the biological rhythms of the human body, especially circadian rhythms, affect the capacity for and performance of exercise. Exercise also affects circadian rhythms. The circadian rhythm influences core body temperature, muscle strength, aerobic and anaerobic exercise capacity, and flexibility. Exercise also causes a phase shift that remodels circadian rhythms. Research has shown that exercise can improve fitness if it is timed to coincide with peak performance. In addition to considering diurnal variations, preferences regarding the time of exercise (day or night) are important for studying the effects of circadian rhythms on exercise performance. Furthermore, there are differences in circadian rhythms among different exercise types. Therefore, arranging exercise time and intensity according to the characteristics of the human circadian rhythm is of great significance for improving training efficiency, reducing the occurrence of exercise injuries, and overcoming biological clock disorders.