Muscular System

Types of Muscles

{ Deltoid Biceps Triceps Muscles of the Arm

{ Quadriceps Adductor Longus Muscles of the Front of the Legs

{ Glutes Hamstrings Gastrocnemius Muscles of the Back of the Leg

{ Trapezius Latissimus Dorsi Muscles of the Back

{ Pectoralis Deltoid Abdominals Muscles of the Front

Slow Twitch Muscle Fibers (Type I) – used for muscular endurance activities, long duration contraction, contains myoglobin Slow Twitch Muscle Fibers (Type I) – used for muscular endurance activities, long duration contraction, contains myoglobin  Examples – jogging, swimming, biking Fast Twitch Muscle Fibers (Type II)– used for muscular strength activities, white muscle, short duration contraction Fast Twitch Muscle Fibers (Type II)– used for muscular strength activities, white muscle, short duration contraction  Examples – Sprinting, weight lifting, tennis Intermediate (Type IIa) – mix between Types I & II Intermediate (Type IIa) – mix between Types I & II Types of Muscle Fibers

Muscles are injured by exposing muscles to resistance Muscles are injured by exposing muscles to resistance Muscles are repaired & adapt to new demands Muscles are repaired & adapt to new demands Muscles need protein, vitamins, hormones & water to repair themselves Muscles need protein, vitamins, hormones & water to repair themselves How Do Muscles Grow