_____ is directly correlated to muscle mass, which is another area that increases with muscular development.

• A. Age
• B. Strength
• C. Weight
• D. Height

Answer: (C)

Muscular development increases muscle mass, and that additional lean tissue adds to the body’s total mass. Weight measures total body mass, so as muscles grow, weight tends to rise. While fat, water, and bone can also influence weight, the amount of muscle tissue has a direct impact on how much you weigh, making weight the best indicator of increases in muscle mass. The other options don’t track muscle mass as directly: age isn’t about current muscle; strength reflects function and can improve without a big change in mass; height remains fixed.