Avni is not a huge fan of exercise, but she knows that it is an important part of staying healthy. She decides that brisk walking for 30 minutes four times a week is a good goal for her. Will this provide adequate movement for fitness?
A.
No, walking is not really considered exercise.
B.
No, she needs to change that walking to running.
C.
Yes, as long as the walking gets her heart rate up a bit.
D.
Yes, she could reduce it to twice a week and still get enough exercise.