Medical disclaimer

Threk is not medical advice, and it is not a medical device.

The training plans, targets, and insights in this app are built from published exercise-science research applied to the information you provide. They are general fitness guidance — not diagnosis, treatment, or a substitute for the judgment of a physician who knows you.

Talk to your doctor before starting or changing an exercise program, especially if you have — or suspect — a heart condition, high blood pressure, chest pain, dizziness, a recent surgery or injury, or if you are pregnant.

Stop exercising and seek medical attention immediately if you feel chest pain, severe shortness of breath, or faintness during a workout.

Heat (sauna) and cold exposure carry real risks, including fainting and cardiac stress. Never use a sauna or cold plunge alone if you have a cardiovascular condition, and never combine them with alcohol.