In this interactive lab, students investigate the effect of exercise on the rate of cellular respiration by measuring heart rate, breathing rate, and carbon dioxide production (by exhaling into a BTB solution) at rest and after two exercise intervals.Students assign pre-defined lab roles and work collaboratively in groups of 3 (or 4) to carry out the procedure and collect data. Lab groups report data to the teacher for class averages (which can be displayed to guide the post lab discussion). Gro