3. MUSCLE ENERGETICS

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

5. 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

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

7. 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.

8. 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.

9. 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

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

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