• Heart activity can be monitored by using an?ECG, measuring?pulse rate?or?listening to the sounds of valves closing?using a stethoscope
• Heart rate (and pulse rate) is measured in beats per minute (bpm)
• To investigate the effects of exercise on heart rate, record the pulse rate at rest for a minute
• Immediately after they do some exercise, record the pulse rate every minute until it returns to the resting rate
• This experiment will show that during exercise the heart rate increases and may take several minutes to return to normal

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