I recommend that every one of my clients conduct their cardiovascular training using a heart rate monitor. A monitor provides a continuous readout of your heart rate, eliminating the need for trying to take a pulse during exercise. This constant feedback allows you to adjust the intensity every minute if necessary, which would be a challenge with pulse taking. The readout is more accurate than hand sensors on cardio equipment, as the strap is worn next to the skin, directly under the chest. It's convenient for outdoor exercising, such as jogging ,bike riding, etc. Otherwise, there's no way to measure the effectiveness of these activities with much precision. For More Advice Contact Valley Personal Fitness 661-472-5260 vallperfit@yahoo.com