天津理工大学体育理论口试题、答案（Tianjin University of Technology sports theory oral examination questions and answers）.docVIP

天津理工大学体育理论口试题、答案（Tianjin University of Technology sports theory oral examination questions and answers） First grade second semester sports theory, test questions, answers I. concept questions 1. concentric muscle contractions Answer: a shortened form of contraction in muscle length. It is the most common form of exercise in strength exercises. It is divided into ordinary centripetal contraction and isokinetic centripetal contraction. 2. isometric muscle contractions Answer: when caused by muscle contraction tension is equal to, or is hard to maintain limb muscle tension to maintain a posture, the muscle fibers while active contraction, but the total length of the muscle does not change, called isometric muscle contraction. 3. over isometric muscle contractions Answer: is the muscle first centrifugal contraction, followed by concentric contraction of the form. For example, jump to the ground, then jump up, at this time, the first leg of the four muscles in the ground when the centrifugal contraction (stretched), and then immediately do violent centripetal contraction, to achieve upward jump. 4. muscle delayed pain Answer: after a large amount of exercise, or after a long period of no exercise, after starting exercise, muscle soreness often occurs. But not in the muscle soreness after exercise, but in the days after the end of the exercise, called delayed onset muscle pain. 5. phosphoric acid system of energy supply Answer: this system is when the ATP decomposition can immediately after decomposition can put creatine to supplement the ATP re synthesis, this process is very rapid, without oxygen, will not produce lactic acid, so it is also called non lactic acid system. But the system has a short duration of energy supply. 6. lactic acid energy supply system Answer: when the bodys rapid muscle movement time continues for a long time (more than 8-10 seconds), the energy supply capacity of the phosphate system can not be supplemented by ATP in time, so the muscle glycoge