The heart is a specialized muscle. If it receives exercise it will continue to beat strong and be able to pump blood and deliver the oxygen the body needs.
Heart disease is the number one killer in the USA today.
We need to exercise our hearts throughout our life in order to be healthy and physically fit. The heart needs a specific level of activity that will be sufficient to produce training effects while not being so high as to produce nausea or harm. THR stands for Target Heart Rate Max. HR stands for maximum heart rate Rest HR stands for resting heart rate The predicted maximum heart rate is calculated by substracting your age from 220. It is reported that an average infant heart rate at birth is 220 beats per minute and that we lose 1 beat per minute for each year we age.