How Can I If I'm Working Tell Hard Enough?
To be sure you're working hard enough to condition your heart and lungs, but not overdoing it, use your pulse, or heart rate, as a guide. One of the easiest places to feel your pulse is in the carotid artery in your neck. Slightly tilt your head back and to one side. Use your middle finger or fore finger, or both, to feel for your pulse. use your thumb; it has a beat of its own. To determine your heart rate, count the number of pulses you feel for 10 seconds and multiply that number by six, or count for 30 seconds and multiply that number by two. Learn to recognize the pulsing of your heart when you're sitting or lying down This is your resting heart rate.