As an introductory activity, young statisticians measure their heart rate at rest and after exercise and compute the mean and median, and create a box & whisker plot.  This is followed by watching a video (that no longer seems to exist on the linked site) that introduces the relationship between exercise and one’s health. They then engage in some form of aerobic activity for two weeks and record their results in a journal. Note: A number of the links to websites no longer exist.