Compare the different types of muscle contractions.
Compare the different types of muscle contractions.
Muscles are formed of muscle fibers. The bundle of muscle fibrils forms a muscle fiber. The muscles produce structure and provide mechanical strength to the body and organs of the body.
To make movements muscles contract and relax ATP is required. The movement around the joints is enabled by the muscles present in the joint.
There are two types of muscle contractions and they are isometric and isotonic. The isotonic muscle contraction is further classified as eccentric and concentric contractions. In isometric muscle contraction, the muscle length remains unaltered. In isotonic muscle contraction the length of the muscle change, in eccentric type the length of the muscle increase, in concentric the muscle length decrease.
| Characters | Isometric contraction | Concentric contraction | Eccentric contraction |
| Lifting objects | Do not support lifting heavy things. | Helps lift heavy objects. | Helps lift heavy objects. |
| Involved in joint movements or not | Does not cause any joint movements | Involved in joint movements. | Involved in joint movements. |
| Effect on sarcomere length | The sarcomere length was shortened. | Sarcomere length decrease | Sarcomere length increase |
| Ability to overcome resistance | Resistance developed cannot be overcome. | Resistance is overcome by force. | Force generated is less than resistance developed. |
| Tension in muscle strands | Tension developed in the muscles increases. | Tension is not developed. | Tension is not developed. |
| Force generation vs Energy expenditure | Force generated equals energy expenditure. | Force generated is greater than the energy spent. | Force generated is less than energy spent. |
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