Which activity primarily uses large muscle groups?

• A. Swimming
• B. Piano
• C. Darts
• D. Typing

Answer: (A)

Large-muscle activities recruit the body's major muscle groups across the legs, hips, back, and chest to generate whole-body movement. In swimming, propulsion comes from powerful, coordinated movements of the legs for kicking, the core and hips for stability and transfer, and the arms pulling through the water. This combination engages large muscle groups throughout the body and creates a high aerobic demand.

In contrast, the other activities mainly involve fine motor control of small muscles in the hands and fingers, with less involvement of the large muscle groups. Playing the piano requires precision from the fingers; typing uses finger and forearm movements; and darts relies on accuracy and control of the hand and forearm.

So, swimming primarily uses large muscle groups.