Stretching is used to improve which of the following?

• A. Range of Motion
• B. Muscle mass
• C. Cardiac output
• D. Bone density

Answer: (A)

Stretching primarily targets flexibility and joint mobility, increasing the range of motion. By gradually lengthening the muscle–tendon unit and surrounding connective tissue, stretching reduces passive resistance and improves elasticity, allowing a joint to move more freely through its available angles. Improved ROM supports everyday movements and can help prevent injury when combined with strength work. The other outcomes—building muscle mass, boosting cardiac output, and increasing bone density—come from different types of training: muscle mass requires progressive overload and nutrition, cardiac output changes with aerobic conditioning, and bone density increases with weight-bearing or resistance loading, not just stretching. So the best answer is range of motion.