It's normal to feel flushed, out of breath and have a pounding heart after a particularly vigorous workout. But your heartbeat, although potentially faster than usual, shouldn't be irregular as a result of exercise. A doctor should investigate irregular heartbeat after exercise to determine the cause, appropriate treatment and safe exercise recommendations.
Arrhythmia
Arrhythmia is the term for an irregular heartbeat, which occurs when there is an abnormality in the electrical impulses in the heart that keep it beating regularly. Most of the time arrhythmias aren't serious, but some may need to be treated with medication or other therapies to regulate the heartbeat. Exercise is still generally recommended for people with arrhythmia for better heart health, says MayoClinic.com.
Caffeine and Stimulants
Caffeine is a stimulant, which increases heart rate and can boost your energy. Downing a caffeinated soft drink, cup of coffee or even a chocolate bar in the hours before your workout can cause your heart to beat irregularly after it's been working hard during physical activity.
Lack of Oxygen
Your heart may beat irregularly if you aren't getting enough oxygen. Exercising to the point of having difficulty breathing or even hyperventilation can affect the levels of oxygen in your blood, which may result in irregular heartbeat. Make sure you don't push yourself too hard during exercise, and that you can breathe well and carry on a conversation. Take breaks when necessary; particularly if you start to feel sick or dizzy.
Dealing With Irregularity
Your doctor can diagnose the cause and type of your irregular heartbeat, and determine whether or not you need medication to manage it. If it only occurs after exercise, your doctor may recommend a change in your physical activity routine or other lifestyle changes that can help your heartbeat to remain regular. Eating a heart-healthy diet that is low in sodium, fat, sugar and cholesterol and rich in whole grains, lean proteins, fruits and vegetables can help manage arrhythmias. Regular exercise, within your body's fitness limits, can also boost heart health and strength.
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