Target heart rate is determined by multiplying the reserve heart rate by training intensity level, p, where 0≤p≤1, and adding the resting heart rate. An adult woman with a resting heart rate of 65 beats per minute (bpm) and a reserve heart rate of 125bpm is told by a trainer that her target heart rate should not exceed 140bpm. What is the maximum training intensity level, p, that is consistent with her trainer's advice?
Q. Target heart rate is determined by multiplying the reserve heart rate by training intensity level, p, where 0≤p≤1, and adding the resting heart rate. An adult woman with a resting heart rate of 65 beats per minute (bpm) and a reserve heart rate of 125bpm is told by a trainer that her target heart rate should not exceed 140bpm. What is the maximum training intensity level, p, that is consistent with her trainer's advice?
Identify Values: Identify the given values.Resting heart rate (RHR): 65 bpmReserve heart rate (ResHR): 125 bpmTrainer's advice for maximum target heart rate (MaxTHR): 140 bpmWe need to find the maximum training intensity level, p.
Write Formula: Write down the formula for the target heart rate (THR).THR=(ResHR×p)+RHRWe know the THR should not exceed 140 bpm, so we set the formula equal to 140 bpm.140=(125×p)+65
Solve for p: Solve for p.Subtract the resting heart rate from both sides of the equation.140−65=125×p75=125×p
Divide to Isolate p: Divide both sides of the equation by 125 to isolate p. p=12575 p=0.6
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