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(220 - 14) X .80

3 answers

To calculate \( (220 - 14) \times 0.80 \):

  1. First, subtract 14 from 220: \[ 220 - 14 = 206 \]

  2. Then, multiply the result by 0.80: \[ 206 \times 0.80 = 164.8 \]

So, \( (220 - 14) \times 0.80 = 164.8 \).

60%-80% of MHR = My Target Heart Rate Range (THRR) is 124 to 165

To understand how you arrived at the Target Heart Rate Range (THRR) of 124 to 165 beats per minute (bpm) based on a percentage of your Maximum Heart Rate (MHR), let's break down the calculations:

  1. Determine MHR:

    • The formula for estimating Maximum Heart Rate is \( MHR = 220 - \text{age} \). If 124 to 165 is your THRR, we can calculate MHR using the given percentages.

  2. Calculate MHR from THRR:

    • If we denote MHR as \( x \):
      • 60% of MHR: \[ 0.60 \times x = 124 \] \[ x = \frac{124}{0.60} \approx 206.67 \]
      • 80% of MHR: \[ 0.80 \times x = 165 \] \[ x = \frac{165}{0.80} \approx 206.25 \]

  3. Approximate MHR:

    • Both calculations suggest that your MHR is around 206 bpm.

  4. Find Age:

    • Using the MHR formula: \[ 220 - \text{age} = 206 \] \[ \text{age} = 220 - 206 = 14 \]

This means that if you are 14 years old, your MHR is indeed estimated to be around 206 bpm. Your target heart rate range during exercise, calculated as 60% to 80% of MHR, would then be accurately expressed as 124 to 165 bpm.

Ensure to adjust for individual fitness levels, and consult with a healthcare or fitness professional for personalized recommendations.