The document describes how to manually measure one's heart rate by taking their pulse. It explains that the pulse is the beating of the heart that can be felt in arteries close to the skin. It then provides instructions for taking one's pulse at the radial artery in the wrist and the carotid artery in the neck. The document demonstrates how to count the number of heartbeats in 30 seconds and multiply by 2 to determine one's heart rate in beats per minute (BPM). Students are prompted to take their pulse in both locations 6 times and calculate their average resting heart rate.