To determine how the lower and upper limits of your target heart rate range are defined, we will carefully analyze each option provided:
1. Option A: Ranging from 50% to 90% of your maximum heart rate.
- This option suggests that your target heart rate should be between 50% and 90% of the maximum heart rate. For example, if your maximum heart rate is 200 beats per minute (bpm), your target heart rate range would be between 100 bpm (50% of 200) and 180 bpm (90% of 200).
2. Option B: Subtracting your age from your maximum heart rate.
- This method is typically used to estimate your maximum heart rate, not the target range. The formula is often given as 220 minus your age. For instance, if you are 30 years old, your maximum heart rate would be approximately 190 bpm (220 - 30).
3. Option C: Taking a pulse in the first and last ten minutes of a workout.
- Monitoring your pulse during specific times of a workout helps track your heart rate at different intervals, but it does not define the target heart rate range.
4. Option D: Ranging from 30% to 70% of your maximum heart rate.
- This suggestion implies a lower range for heart rate targets. For instance, if your maximum heart rate is 200 bpm, your target heart rate range would be between 60 bpm (30% of 200) and 140 bpm (70% of 200).
From the details provided, and particularly focusing on the approach commonly used to define the target heart rate range, Option A provides the most accurate method concerning exercise guidelines. Therefore:
- Correct Answer: Ranging from 50% to 90% of your maximum heart rate.
So, the correct answer is:
OA. Ranging from 50% to 90% of your maximum heart rate.
