Question

question 7
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in which of the following contractions do muscles lengthen while moving a load?
concentric contraction
eccentric contraction
isometric contraction
isotonic contraction

Explanation:

• Concentric Contraction: Muscles shorten while generating force.
• Eccentric Contraction: Muscles lengthen while generating force (e.g., lowering a weight).
• Isometric Contraction: Muscle length remains unchanged; force is generated without movement.
• Isotonic Contraction: Includes both concentric and eccentric contractions (as it's a broader term for contractions with muscle - length change). But the key here is the specific description of lengthening.

Answer:

Eccentric Contraction