Comprehensive fitness involves a mix of strength training for hypertrophy, HIIT for metabolic health, and corrective exercises for postural alignment.
Certain foods can speed up your heart rate and make it feel as if it is racing. If you ingest something that has a stimulative effect, your heart gives a "fight or flight" response, much as it would in response to exercise, fear or anger.
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The average heart at rest beats about 60 to 80 times a minute, and gets slightly quicker as you age. Prescription medications can lower a heart rate that beats dangerously fast. Doctors also have a technique (which can be dangerous outside of a medical setting) called carotid sinus massage to stop a racing heart.
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