Which device measures static muscular strength at a specific joint angle?

• A. Dynamometer
• B. Cable tensiometer
• C. Isometricometer
• D. Muscle twitch monitor

Answer: (C)

Measuring static muscular strength at a fixed joint angle focuses on the force produced without any movement, during an isometric contraction. An instrument designed to capture that exact scenario is the isometricometer, which records the peak force while the joint is held at a specific angle. This angle-specific, non-moving contraction is what sets isometric strength apart from other types of strength measures.

A dynamometer can measure force but isn’t inherently tied to a single joint angle or a purely static contraction, and is used in a variety of tasks, sometimes dynamic. A cable tensiometer measures tension in a cable, not the muscle’s force output at a joint. A muscle twitch monitor records the muscle’s response to a brief electrical stimulus, not the maximal static force at a chosen angle.