Question

read the scenario. maya, a 10th - grade - student athlete, is planning a new training routine to enhance her performance on the school soccer team. understanding the importance of working out within her optimal heart rate zone, maya calculates her target heart rate (thr). as a 15 - year - old, she calculates her maximum heart rate (mhr) by subtracting her age from 220, resulting in an mhr of 205 beats per minute (bpm). what is mayas target heart rate (thr) zone, and what does it suggest about her workout intensity? 100 to 150 bpm, suggesting she is not pushing hard enough in her training 92.25 to 164 bpm, indicating a healthy and efficient cardiovascular fitness level 150 to 200 bpm, indicating an intensity beyond her level for cardiovascular training 102.5 to 174.25 bpm, indicating a safe and effective level for cardiovascular fitness

Explanation:

Step1: Determine the formula for target - heart - rate zone

The target - heart - rate (THR) zone is typically calculated as 50 - 85% of the maximum heart rate (MHR). Maya's MHR is 205 bpm.

Step2: Calculate the lower limit of the THR zone

The lower limit is 50% of MHR. So, $0.5\times205 = 102.5$ bpm.

Step3: Calculate the upper limit of the THR zone

The upper limit is 85% of MHR. So, $0.85\times205=174.25$ bpm.

Step4: Analyze the meaning of the zone

A target - heart - rate zone of 102.5 to 174.25 bpm indicates a safe and effective level for cardiovascular fitness.

Answer:

102.5 to 174.25 bpm, indicating a safe and effective level for cardiovascular fitness