What type of muscle contraction occurs when the muscle elongates?

The correct answer is eccentric because this type of muscle contraction occurs when the muscle lengthens while generating force. In this situation, the muscle is overcoming a load that is greater than the force it produces, which results in elongation. For example, during the lowering phase of a bicep curl, the bicep muscle lengthens as it controls the weight being lowered back down.

Understanding eccentric contractions is vital in rehabilitation settings, where controlled elongation of muscles can help with strength training and functional movement. This type of contraction is commonly involved in activities that require controlling movement against gravity or resistance, providing stability, and minimizing injury risks.