Do Activity 3 using pulse rate instead of arm span. Measure pulse rates by counting the number of heartbeats in 1 min.

Data from activity 3
Divide into groups of 8 to 12 people. For each group member, measure his or her height and measure his or her arm span. For the arm span, the subject should stand with arms extended, like the wings on an airplane. Divide the following tasks among subgroups of three or four people.