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Types of Muscular Contractions
1. Isotonic Contractions
Definition: Muscles change length to produce movement.
Types:
Concentric Contraction
Muscle shortens under tension.
Example: Upwards phase of a bicep curl.
Another Example: Upwards phase of a push-up (triceps shorten under tension).
Eccentric Contraction
Muscle lengthens under tension.
Example: Downwards phase of a bicep curl.
Another Example: Downwards phase of a push-up (triceps lengthen under tension).
Summary: Isotonic contractions involve visible movement as muscles either shorten (concentric) or lengthen (eccentric) under tension.
2. Isometric Contractions
Definition: Muscles do not change length while under tension; no movement occurs.
Examples:
A handstand, where the arms support body weight without movement.
A plank position, where the performer holds a stationary stance.
Conclusion
The video covered isotonic contractions (concentric and eccentric) and isometric contractions.
Encouragement to like the video and comment with questions.
Note: This summary encapsulates the key points discussed in Mr. Matthews' video on muscular contractions. Use this as a reference to understand the basic concepts of muscle movements in physical exercises.