Which formula predicts training zones by combining resting heart rate and maximum heart rate?

The Karvonen Formula is the correct choice for predicting training zones by combining resting heart rate and maximum heart rate. This formula calculates target heart rate zones based on an individual's cardiovascular fitness level by taking into account both the maximum heart rate and the resting heart rate. The formula is expressed as:

Target Heart Rate = ((Maximum Heart Rate - Resting Heart Rate) × Desired Intensity) + Resting Heart Rate

This method is beneficial as it allows for the personalization of training zones, making it more effective for individuals at various fitness levels. By incorporating the resting heart rate, the formula adjusts for the individual's baseline fitness, providing a more accurate reflection of their actual exercise intensity.

In contrast, other options do not serve the same function. The Haskal Equation is less widely used and not primarily associated with heart rate training zone calculations. The Fox Formula is a method to estimate maximum heart rate based on age, but it does not combine resting heart rate. The Borg Scale, meanwhile, measures perceived exertion rather than directly calculating heart rate training zones. This distinction reinforces why the Karvonen Formula is the preferred method for accurately predicting effective training zones tailored to the individual's heart rate characteristics.