Why should you measure your level of flexibility? A. to calculate your exact level of muscular strength B. to track your improvements in flexibility over time C. to compare your flexibility to the national standards D. to determine your future athletic ability

B

Explanation:

Tracking flexibility is important because it not only helps you indicate which exercises you should be doing but it will let you know how they are improving over time.  Several circumstances are taken into record when setting personal flexibility, joint structure, ligaments, tendons, muscles, skin, tissue injury, fat tissue, body temperature, exercise level, age and manhood all impact an individual's range of movement about a joint.

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the gravitational force on an object increase as the mass of an object also, im not going to report you, but this question should be under the science category, not health

the answer is life structure