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1, the essence of strength
The so-called force nature refers to the ability of the muscle to show the force effect in a serious state (the length is constant) or the shortening of the state (short length). The essence of force can be divided into two categories: first, static force, which refers to the strength that occurs when muscles are short when the muscle length is constant. The dynamic force can be divided into weight force and speed force.
The key element of the strength of the resolution is the improvement of the structure and function of the muscle itself, and the two is the improvement of the function of the nervous system.
2, the essence of speed
Speed essence refers to the ability of the human body to move quickly, including displacement speed (passing quickly through a certain interval), reaction speed (the ability to respond quickly to various stimuli), and the speed of movement (the ability of quick ending action).
3, the essence of endurance
The so-called endurance is the long-term activity of the human body or the ability to oppose exhaustion. It contains speed endurance (anaerobic endurance, which means the body's ability to stick to fast movement in a shorter time). General endurance (aerobic endurance, the human body's ability to perform moderate muscle activity for a long time), and special endurance.
4, the essence of activating collaterals
Active essence refers to the change of conditions, players can agile, accurate, coordinated changes in physical exercise ability.
5, the essence of flexibility
It contains two aspects of soft and tough, soft is the base, and toughness is the most important.