Kinesiology Muscle Contraction

1. Types of Muscle
Contraction
Kinesiology

2. Two types of Contractions
 Isotonic Contraction
 Isometric Contractions

3. Isotonic Contraction
 Isotonic contractions maintain constant
tension in the muscle as the muscle
changes length.

4. Two type of Isotonic Contraction
Concentric Contractions
Eccentric Contractions

5. Concentric Contraction
 A concentric contraction is a type of muscle contraction in
which the muscles shorten while generating force,
overcoming resistance.
For example, when lifting a heavy weight, a concentric contraction of the
biceps would cause the arm to bend at the elbow.

6. Eccentric Contraction
 An eccentric contraction results in the elongation of a
muscle while the muscle is still generating force.
 Resistance is greater than force generated
 Eccentric contractions can be both voluntary and
involuntary.

7. Isometric Contractions
 Isometric contractions generate force without
changing the length of the muscle
 Isometric contractions are frequently used to
maintain posture.
 Common in the muscles of the hand
and forearm responsible for grip.