Which is correctly matched contraction type and example?

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Multiple Choice

Which is correctly matched contraction type and example?

The main idea here is how muscle length behaves during the contraction. Isometric contraction means the muscle fires without changing length, holding a position steady. A plank is a classic static hold where the core and supporting muscles generate tension to keep you level, but the fibers don’t noticeably shorten or lengthen during the hold. So the description “isometric contraction: muscle length unchanged; example plank” matches this concept perfectly. The other descriptions mix up the length change or the movement type: isotonic contractions involve the muscle changing length while moving a load (like leg extensions or push-ups), and isokinetic contractions require moving at a constant speed, usually with specialized equipment.

The main idea here is how muscle length behaves during the contraction. Isometric contraction means the muscle fires without changing length, holding a position steady. A plank is a classic static hold where the core and supporting muscles generate tension to keep you level, but the fibers don’t noticeably shorten or lengthen during the hold. So the description “isometric contraction: muscle length unchanged; example plank” matches this concept perfectly.

The other descriptions mix up the length change or the movement type: isotonic contractions involve the muscle changing length while moving a load (like leg extensions or push-ups), and isokinetic contractions require moving at a constant speed, usually with specialized equipment.

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