How does hydrodynamic drag influence turn speed and underwaters in swimming?

• A. Drag reduces speed; reducing drag during push-off and underwater phases enables faster turns and longer effective underwater distance.
• B. Drag increases speed when combined with underwater kicks.
• C. Drag has no impact on turn speed or underwater distance.
• D. Drag reduces speed; drag is only relevant on surface swimming.

Answer: (D)

Hydrodynamic drag is the resistive force water applies to any swimmer moving through it. In a turn, you must reverse direction and push off the wall, then enter an underwater phase where you propel with kicks. In both parts, drag slows you down. By reducing drag during the push-off and the underwater phase—staying streamlined, keeping the body aligned with the direction of travel, tucking in the head, pointing the toes, and minimizing unnecessary limb motion—you preserve higher velocity right after the wall and throughout the underwater glide. This makes the turn feel quicker and allows you to cover more distance underwater before needing to surface for a stroke. Drag matters in underwater motion just as much as on the surface, so it’s not correct to say it’s only relevant during surface swimming.