Why Does Your Heart Rate Increase During Exercise
The average adult has a resting heart rate of approximately 60 to 80 beats per minute. Image Credit: Artem Varnitsin / EyeEm/EyeEm Premium/GettyImages Your heart is a pump that circulates blood — and with it, oxygen and nutrients — throughout your body. When you work out, your muscles need more oxygen and nutrients to use as fuel, so your heart beats faster to power that increased circulation. Advertisement Tip When you work out, your muscles need more oxygen and nutrients to use as fuel....