After exercise, your heart rate increases, this is normal for everyone. However this experiment asks whether the recovery time for a heart's beating rate is faster for people who get regular exercise versus those that do not.

Heart rates can be determined by the amount of physical activity your body is engaging in. The more physically active you are, the faster your heart beats. You can measure the rate your heart is beating by taking your pulse. This science...

One-page article describes the pumping action of the heart.

A wealth of information on arrhythmias. Find out about the kinds of arrhythmias, causes, and treatments.

If you have ever had to adjust to a new time zone, you have noticed that it takes a while before you start to feel normal again. By shifting your sleep and activity schedule, you have altered the pattern of your body's circadian rhythms....

In this lesson plan site, the students will learn about the circulatory system and perform an experiment where they take their pulse after various activities.

Will wearing shoes help a baby walk sooner? Does caffeine stunt a child's growth? Does chocolate cause acne? Find old wives' tales about pregnancy, infants, food, coffee, and illness, and answers to the above questions.

One-page article provides useful information on arrhythmia, including categories, symptoms, diagnosis, and treatment.