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If a 25-year-old patient is to work at 80% of his maximal heart rate, what would be his target heart rate?

  1. 170 BPM

  2. 156 BPM

  3. 145 BPM

  4. 140 BPM

The correct answer is: 156 BPM

To accurately determine the target heart rate at 80% of maximal heart rate for a 25-year-old patient, one must first calculate the estimated maximal heart rate. The most common method to estimate maximal heart rate is to use the formula: Maximal Heart Rate = 220 - Age. For a 25-year-old, the calculation would be: Maximal Heart Rate = 220 - 25 = 195 BPM. Next, to find the target heart rate at 80% of this maximal rate, you would take 80% of 195 BPM: Target Heart Rate = 0.80 × 195 = 156 BPM. This calculation clearly shows that the appropriate target heart rate for the patient working at 80% of their maximal heart rate is indeed 156 BPM. This value aligns with established guidelines for exercise intensity, ensuring that individuals can safely reach a cardiovascular training zone that promotes fitness without overexerting themselves.