Which activity best improves flexibility?

• A. Sprinting
• B. Static stretching
• C. High-intensity cycling
• D. Heavy resistance training

Answer: (B)

Flexibility improves best when the muscles and soft tissues are regularly lengthened through holds. Static stretching does this directly: you gently move into a stretch and hold it for about 15 to 60 seconds, allowing the muscle fibers and surrounding connective tissues to elongate and adapt. With repeated sessions, the tissues become more compliant, increasing the joint’s range of motion and overall flexibility.

The other activities focus on speed, power, endurance, or strength, and while they can contribute to warm-up or mobility, they don’t systematically lengthen tissues the way a dedicated static-stretching routine does.