Question

participating in cardiovascular exercise in the target heart rate zone will result in
higher maximum heart rate
a higher resting heart rate
a lower resting heart rate
a lower maximum heart rate

Explanation:

Cardiovascular exercise in the target heart rate zone improves cardiovascular fitness. A fit heart (from regular cardio) pumps more blood per beat, so at rest, it needs to beat fewer times (lower resting heart rate). Maximum heart rate is mainly age - related, so cardio in target zone doesn't raise it (eliminating "higher maximum heart rate") and doesn't lower maximum heart rate (eliminating that option). A higher resting heart rate is opposite of fitness benefits, so the correct effect is a lower resting heart rate.

Answer:

C. a lower resting heart rate (assuming the options are labeled A: higher maximum heart rate, B: a higher resting heart rate, C: a lower resting heart rate, D: a lower maximum heart rate)