There are two types of muscle contractions: isotonic and isometric. Isotonic contractions maintain tension as the muscle length changes, including concentric contractions which shorten muscles to overcome resistance, and eccentric contractions which elongate muscles while still generating force. Isometric contractions generate force without changing muscle length, and are used to maintain posture and grip.

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.