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WEIGHT TRAINING Muscles Types & Muscle Fibers
Muscle Types n You have 3 Types of Muscles: – Smooth – Cardiac – Skeletal
Smooth Muscle – Makes up the walls of internal organs such as the stomach and blood vessels – Classified as an involuntary muscle because you cannot consciously control their movements
Cardiac Muscle – Your heart is made of cardiac muscle. – Classified as an involuntary muscle because you cannot consciously control your heart beating.
Skeletal Muscle – Are attached to the bones and make movement possible. – These are the muscles you used for movement – Classified as voluntary muscles because you control them.
Types of Muscle Fibers n Muscle fibers are muscle cells, which are long, thin, and cylinder-shaped n There are 3 types of muscle fibers: – Slow-Twitch – Fast-Twitch – Intermediate-Twitch
Slow-Twitch Fibers – Contract at a slow rate – These fibers have good endurance and are involved in cardiovascular activities. » Aerobic Exercises n. Long distance runners, biking
Fast-Twitch Fibers – Muscle contracts fast – Muscle fibers you use for strength activities » Anaerobic Exercises n. Power lifting, sprinters, agility drills
Intermediate-Twitch Fibers – Have the characteristics of both slowand fast-twitch fibers – They contract fast and have good endurance – You can use them for activities that involve both strength and cardiovascular fitness » Athletic Competition
n The types of fibers that your muscles are made of are determined by your genes, and those genes are hereditary. n You can not change the fiber types. n You can increase the strength and endurance of your muscles by proper training
Movement of Muscle n Concentric Movement: – The contraction or shortening of the muscle. Muscle is being strengthened, the hard stage of the lift. n Eccentric Movement: – The lengthening of the muscle, the lighter stage of the lift.