Question

At least _____ to _____ continuous minutes of intense exercise must be used in order to improve cardiorespiratory endurance.

A) 20 to 30

B) 5 to 10

C) 10 to 15

D) 50 to 60

Answer 1

i thinks its 20 - 30 because 50-60 would judt be entirely to much.

Step-by-step explanation: