This sentence is deliberately from Zhuangzi, which means: Regular exercise can strengthen your bones and muscles and relieve your qi and blood, which embodies the "way of health preservation" advocated by Zhuangzi, that is, you should keep proper exercise and activities in your daily life to keep healthy. This idea emphasizes exercising all parts of the body through proper exercise to enhance the body's resistance and health. At the same time, exercise can also promote blood circulation, which is good for health.