Isokinetic exercise is best described by which statement?

• A. Resistance is provided at a fixed velocity of movement with accommodating resistance
• B. The muscle length does not change during the movement
• C. The resistance remains constant regardless of effort
• D. The exercise uses no external resistance

Answer: (A)

Isokinetic exercise is defined by moving a limb at a constant speed while the resistance adjusts to match the force you apply. The best statement captures this by saying resistance is provided at a fixed velocity of movement with accommodating (variable) resistance. The machine keeps the angular velocity constant, and as you push harder or softer, the resistance changes to maintain that speed, allowing maximal effort throughout the entire range.

The other descriptions don’t fit because: moving with no change in muscle length would be isometric, not isokinetic; resistance that stays the same regardless of effort describes a constant-load (isotonic) scenario, which isn’t isokinetic; and using no external resistance contradicts the idea of a device designed to provide controlled resistance in isokinetic training.