How are the lower and upper limits of your target heart rate range defined? a. ranging from 50% to 90% of your maximum heart rate. b. subtracting your age from your maximum heart rate. c. taking a pulse in the first and last ten minutes of a workout. d. ranging from 30% to 70% of your maximum heart rate.

A. Ranging from 50% to 90% of your maximum heart rate.

Explanation:

The lower and upper limits of the target heart rate is defined by taking the 50% and the 90% of the maximum heart rate.

The target heart rate when doing exercise is the heart rate that is thought to be ideal when doing different things, it is a range from 50% to 90% of the maximum divided in the next categories:

60-70% of maximum heart rate-weight loss, building endurance

70-80% of maximum heart rate-weight management, improving cardio fitness

80%+ of maximum heart rate-interval workouts

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