In which device does the athlete compress a spring to test muscular strength?

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

Answer: (D)

A dynamometer measures the amount of force a muscle can produce by translating that force into a readable value, often using a spring mechanism. In spring-based designs, the athlete exerts force by squeezing or pulling, which compresses the internal spring. The amount the spring compresses is calibrated to reflect the strength being produced, giving a numeric readout of muscular strength. This direct use of spring compression to quantify force is why this device is specifically used for testing strength. The other instruments serve different purposes—monitoring neural or twitch responses, measuring tension in cables, or assessing isometric force in various ways—so they don’t fit the same simple, spring-based strength test.