Strength training is a training method that provides energy mainly through anaerobic metabolism of exercise. It is characterized by relatively high exercise intensity, mainly manifested in low repetitive muscle contraction and short duration of exercise. The first thing that most people can think of is bodybuilding training in the gym, weightlifting training in the sports field and all kinds of cool street fitness exercises, excluding those grandfathers who hit trees in the park.

Besides, all kinds of explosive training we can do on the playground, such as short running, stair running, frog leaping and squat, can be regarded as strength training.

Some researchers analyzed 17 reports at home and abroad about the correlation between endurance and strength training and the level of runners, involving 276 subjects, 30% of whom were high-level runners. The conclusion is that no matter what form of strength training and endurance training are used at the same time, the running economy of long-distance runners can be effectively improved, especially for excellent athletes. On the basis of maintaining running endurance training, the frequency of strength training should be kept at 2-3 times a week, and the ideal effect can be obtained in 9- 12 weeks.