Question

brad is eager to improve his cardiorespiratory endurance in order to make the starting line up for this years junior varsity basketball team. he decides to run the pacer for 50 laps monday, wednesday, and friday. he also decides to run 2 mile in 25 minutes tuesday and thursday. he is 14 years old. his maximum heart rate is 206 bpm. his target heart rate is 144.2 (threshold) to 185.4 (ceiling). his heart rate rises to 135 bpm when he does the pacer and 165 bpm when he runs the two miles. are both of these exercises effective for building his cardiorespiratory endurance? explain.

Explanation:

Cardiorespiratory endurance is enhanced when the heart rate is within the target heart - rate zone. Brad's target heart rate is \(144.2 - 185.4\) bpm. When running the pacer, his heart rate is \(135\) bpm (below the target zone). When running 2 miles, his heart rate is \(165\) bpm (within the target zone).

Answer:

No. Running the pacer is not effective as \(135<144.2\). Running 2 miles is effective as \(144.2 < 165<185.4\).