KIN 2504 Chapter : KIN 2504 Chapter 4

• School: LSU
• Department: Kinesiology: Professional Courses/Basic Activity Courses
• Course: KIN 2504
• Professor: All

Document Summary

Building strength and muscular endurance: tendons attach muscle to bone. Individual muscle cells are called muscle fibers made up of myofibrils. Two: actin and myosin strands are called sarcomeres. They require oxygen: other muscle fibers are ones that contract quickly and forcefully. They can fatigue quickly as well are called fast twitch fibers. (example: calf muscles: proportion of fast twitch versus slow twitch genetic makeup can influence this as well as training. Marathoners typically have more slow twitch fibers whereas a weightlifter typically has more fast twitch. Motor units and muscle contraction strength: nervous system sends a nerve impulse along a motor nerve and the motor nerves then takes it to the actual muscle. One motor nerve will stimulate multiple muscle fibers: you cannot have muscle contraction without stimulation, motor unit . Three types of muscle: skeletal muscle voluntary (biceps, triceps, etc. , muscular fitness muscle strength ad endurance. Involuntary smooth muscle (allows food to move through digestive system)