I believe it is Amy's, because you said Amy's target heart rate zone is 140bpm -- 186bpm. Thus, Amy's is higher
Answer:
The answer would be 4. just yourself
Explanation:
If you only have yourself for support then theres no system in place
C. H<span>ow hard a person works to do an activity.
Intensity has to do with effort. If a person works hard than they are intense, if vise versa than they are not intense.</span>
what is this for, why do you need an answer?