Heart palpitations are often described as sensations that the heart is fluttering, racing or skipping a beat. Most of the time, palpitations are triggered by some type of stimuli, such as exercise. The increase in physical activity causes the heart to beat faster than normal, which can sometimes make it feel as if it's pounding or racing. More vigorous physical activity can also trigger a premature or extra beat, resulting in a fluttering sensation. Though alarming, palpitations aren't usually problematic because your heart is still pumping normally.
Treatment
Medical professionals often recommend avoiding triggers to treat palpitations. But because palpitations are brought on by exercise, this doesn't necessarily mean you need to give up your chosen athletic pursuit. Instead, you can reduce the intensity of your workout until your fitness level improves.
Blood Sugar
If you're still experiencing palpitations from exercise, you may need to consider what you're eating before your workout. Strenuous exercise can deplete glucose levels in your bloodstream. Because glucose acts as the main fuel source for the body, your heart may begin to race or pound. Not eating enough before going to the gym can lead to low blood sugar, so make sure you eat a snack an hour before exercising. Energy bars, granola bars, yogurt, fruit, peanut butter and whole grains are all good options to help keep your blood sugar in check.
Dehydration
Palpitations during exercise may also be an indication of dehydration, says Harvard Medical School -- particularly when dehydration is severe. Dehydration can affect the electrolyte levels in your body. Electrolytes are basically salts that conduct an electrical charge, and they're needed for the body to function properly. The imbalance in electrolytes can disrupt the heart's electrical impulses, causing it to race, pound or take a premature beat. To ensure you're getting enough fluids, drink 2 to 3 cups water at least two hours before your workout. It's also important to replenish fluids lost during exercise, so drink at least 1/2 cup water every 20 minutes or so.
Warning
Though palpitations aren't often cause for alarm, talk to a doctor if they're accompanied by shortness of breath, dizziness, fainting or chest pain, says MayoClinic.com. These symptoms could be an indication of an underlying disorder, including heart disease, heart failure or arrhythmia.
