Which is NOT a major factor that affects flexibility?

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

Answer: (D)

Flexibility is driven by physical and physiological factors that change how tissues respond to stretching and movement. Temperature is a major factor because when muscles and connective tissues warm up, they become more pliable and allow a greater range of motion. Age is another major factor since aging changes tissue elasticity and joint structures, typically reducing flexibility. Gender can influence flexibility to some extent due to anatomical differences and hormonal effects, but it’s not as strong a determinant as temperature or age. Intelligence, however, has no direct impact on the properties of muscles, tendons, ligaments, or joints, so it does not affect flexibility. Therefore, intelligence is the factor that is not a major influence on flexibility.