Which factor is considered a major determinant of flexibility?

• A. Temperature
• B. Gender
• C. Age
• D. Intelligence

Answer: (A)

Flexibility is strongly influenced by the temperature of the muscles and connective tissues. When tissues are warm, their elasticity increases and stiffness decreases, allowing a greater range of motion. Heating raises tissue temperature, reduces collagen viscosity, and improves stretch tolerance, which is why a proper warm-up enhances ROM before activity or stretching. Among the factors listed, temperature has the most immediate and meaningful effect on flexibility, whereas age and gender may shape baseline levels over time but don’t produce the same quick changes; intelligence has no direct impact on how flexible the tissues are.