Which is a better indicator of physical fitness, heart rate or blood pressure?

Even though your heart beats more times a minute after exercising or overexertion, healthy blood vessels dilate (get larger) to allow more blood to flow through more easily. Taking your pulse can measure your cardiovascular activity and oxygen consumption, but it is not a substitute for measuring your blood pressure.

Explanation:

a, b, c - sides of a triangle

a + b > c

a + c > b

b + c > a

we have a = 5m and b = 11m. substitute:

5 + 11 > c

16 > c → c < 16

5 + c > 11         subtract 5 from both sides

c > 6

11 + c > 5         subtract 11 from both sides

c > -6

c < 16 and c > 6 and c > -6

thereofre your answer is 6m < c < 16m