In terms of CR development, the ____ doesn't/don't know whether you are walking, swimming, or cycling.
A) heart
B) brain
C) eyes
D) muscles
E) conscious mind
Question 2
Among other things, the activity you choose to improve your cardiorespiratory endurance should be based on ____.
A) your personal preferences
B) professional research
C) blogs on the subject
D) popularity of the exercise
E) your need to challenge yourself