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In this online activity, learners measure their pulse rates and investigate how their pulses change when they engage in different activities.

In this activity, learners take their own pulse and explore how heart rate is affected by various activities.

In this experiment, pairs of learners explore how cold water affects circulation. The mammalian diving reflex (MDR) slows circulation when the body is exposed to cold water.

In this activity about heart health (on page 27 of the PDF), learners measure their heart rates after a variety of physical activities and compare the results with their resting heart rates, and with