If you enjoy relaxing in a hot tub but have a heart condition, soak with caution. Medical experts say sudden or extended immersion in hot water can superheat your body and stress your heart.
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“Hot tubs and saunas are potentially dangerous for patients with known or suspected heart disease,” says cardiologist Curtis Rimmerman, MD.
However, awareness and common sense can help keep you safe while you soak, he says.
Talk with your doctor before enjoying a soak. If you get the go-ahead, follow these tips to keep yourself safe:
When you submerge your body in hot water, your temperature rises, but your blood pressure drops.
Evaporating sweat normally helps cool you off. But, when you immerse yourself in hot water, that natural cooling mechanism doesn’t work. As a result, you can’t cool off.
When your body gets superheated:
Normally, these events don’t cause problems. However, if you have existing cardiovascular disease, the cascade of events could overtax your heart. This can lead to:
Medications prescribed for heart conditions can also contribute to the problem:
Dr. Rimmerman describes the process this way: “A sudden rise in body temperature creates significant stress on your cardiovascular system, predominantly via a cascade of adjustments resulting in an elevated heart rate. The higher heart rate ― especially in the presence of reduced heart function, heart arrhythmias and coronary artery blockages ― can cause a cardiac event such as blood flow problems and, in the worst case scenario, manifest as a heart attack.”
You should always keep safety in mind ― even when relaxing in a Jacuzzi, Dr. Rimmerman says. “My best advice is to make sure the water temperature is not too high, to stay hydrated, and if you choose to use a hot tub or sauna ― especially if you are a heart patient ― engage in the activity for only brief periods of time.”