Heart palpitations: an electrolyte issue?

You feel it mid-workout. Or lying in bed at night. Or randomly at 2 pm on a Tuesday. The sudden awareness that your heart is doing something different, be it a flutter or a skipped heartbeat. If palpitations have made you nervous about electrolytes, this one's worth a read.

The vast majority of palpitations — even ones lasting several minutes to an hour — usually don’t indicate a heart problem.

When you significantly change the balance of fluids and electrolytes, your cardiovascular system may need to adjust. That adjustment can briefly make your heartbeat feel faster, stronger, or slightly off — even when nothing is wrong.

What does that look like in practice?

Rehydration palpitations: When you add fluid to your system, blood volume increases. Your heart may speed up briefly to accommodate the change before settling into a steadier rhythm.
Dehydration palpitations: When fluid and electrolyte levels drop, blood volume falls. Your heart compensates by beating faster and harder — which can feel like racing or pounding, especially if you're already behind in your workout.
Post-workout flutters: Sweating depletes electrolytes that regulate your heart's electrical signals.
Temporary imbalances can cause irregular heartbeats.

So when should you be concerned?

Red flag symptoms that warrant medical attention (and which palpitations are benign)
How sodium, potassium, calcium, and magnesium each contribute to the heart rhythm
Why does your heart rate sometimes get faster before it slows down

The 2 main electrolytes that help with heart palpitations are magnesium and potassium. Make sure you add some to your water!

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