The target heart rate during moderate-intensity exercise is 50 to 70 percent of the maximum heart rate; this would be 90 to 126 beats per minute for someone age 40. During vigorous exercise, the target heart rate is 70 to 85 percent of the maximum heart rate, which would be 126 to 153 beats per minute for a 40-year-old. read more
Resting Heart Rate. Your resting heart rate, or normal heart rate, is the number of beats per minute while your body is at rest. The normal rate ranges and rises with age, but is generally between 60 and 100 beats per minute. Lower resting heart rates indicate more efficient heart function and better cardiovascular fitness. read more
Many believe that the ideal maximum heart rate for a workout should be about 80 percent of the maximum for your age. In other words, multiply your maximum heart rate by .80 and you'll get the ideal heart rate for a workout, also known as your target maximum heart rate. read more