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Health Contraindications and Heat Safety

Important heat-exposure safety information before using sauna or heat-training features.

Effective April 26, 2026

Heat exposure can be risky

Sauna and heat training can create meaningful physiological stress. Risks may be higher with cardiovascular disease, uncontrolled hypertension, pregnancy, heat illness history, dehydration, fever or infection, certain medications, fainting history, severe heat sensitivity, or other health conditions.

Check before starting

Do not start heat exposure if you are unsure whether it is safe for you. Consult a qualified clinician before beginning or continuing heat training if you have any known risk factors or symptoms.

SWELTR cannot know all personal medical factors. The app provides educational estimates and suggested starting points only.

Stop when needed

Stop a session if you feel dizzy, faint, confused, nauseated, unusually weak, short of breath, have chest pain, or otherwise feel unsafe. Seek medical attention when symptoms warrant it.