High school students are computing their target heart rates for exercise. Which method takes into account individual differences?

The Karvonen method is the correct choice for computing target heart rates because it incorporates individual differences by considering both resting heart rate and age. This approach enables a more personalized target heart rate range, reflecting a person's fitness level and cardiovascular efficiency.

The method calculates the target heart rate by first determining the heart rate reserve, which is the difference between the maximum heart rate (calculated as 220 minus age) and the resting heart rate. By applying a desired intensity percentage (typically between 50% to 85%), the Karvonen method establishes a more tailored exercise intensity that aligns with an individual's physical condition.

In contrast, the standard method and percentages like the 65-85% method apply broad guidelines based on estimated maximum heart rates without personalization. The pulse rate method typically refers to monitoring heart rates during exercise but doesn’t provide a formula for determining target heart rates based on individual differences. Thus, the Karvonen method is particularly effective for high school students as it accounts for varying fitness levels and physiological differences.