MUSCLE ENERGETICS Frank starling Law Greater the initial length of the Sarcomere, Greater will be the Force of Contraction.

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Presentation transcript:

MUSCLE ENERGETICS

Frank starling Law Greater the initial length of the Sarcomere, Greater will be the Force of Contraction

LENGTH-TENSION Diagram (Frank-Starling Law) Greater the initial length of the Sarcomere, Greater will be the Force of Contraction Z Z M A X I U

Energy Sources & metabolism in skeletal Muscles ATP- (Immediate source) Phosphocreatinine Anaerobic glycolysis Aerobic Glycolysis

Muscle Contraction In muscular system contraction means muscle fibers generating tension with the help motor neurons and while under tension the muscle may shorten ,lengthen or remain the same.

Muscle tension: The force exerted on an object by a muscle is known as muscle tension Muscle Load: The force exerted on the muscle by an object is the muscle load.

Characteristics of Whole Muscle Contraction . Isotonic. Length changes but Tension remains constant. Two Forms of Isotonic Cont. 1. Concentric (Muscle shortens while lifting the weight) 2. Eccentric ( while putting the weight back, the muscle lengthens) Or walking down hill Types of Contraction

Types of Contraction Isometric. Tension is increased but Length remains constant. .e.g Isometric Contraction in the heart

Isometric versus Isotonic contraction Latent period is longer in isotonic contraction as compared to isometric contraction

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