Question

to track his progress and ensure that hes hitting the best intensity for his age, alex uses a device that monitors his heart rate throughout his gym sessions. alex’s mhr is 185 bpm. he targets 50-85% of his mhr when exercising, which translates to a thr range of approximately 93–157 bpm. with the help of his device, alex can stay within this target zone, maximizing the benefits of his cardiovascular workouts without overexertion. which device does alex need to use?

• a heart rate monitor because it can continuously track and display his heart rate
• a smartphone because it can run apps that counts the number of exercises completed
• a blood pressure cuff because it measures blood pressure, which can vary with exercise intensity
• a calorie counter because it estimates energy expenditure, which is related to exercise intensity

Explanation:

Alex needs to monitor his heart rate during gym sessions to stay in his target heart rate (THR) range. A heart rate monitor is designed to continuously track and display heart rate, which aligns with his goal. A smartphone app counting exercises doesn't track heart rate, a blood pressure cuff measures blood pressure (not heart rate for intensity tracking here), and a calorie counter estimates energy expenditure, not heart rate. So the correct option is the one about the heart rate monitor.

Answer:

a. a heart rate monitor because it can continuously track and display his heart rate