In-depth

Prevention

Cold-weather exercise

Cold outside? Don't put your fitness routine on hold. Stay safe and warm with these cold-weather exercise tips.

Risk factors

High blood pressure (hypertension)

Symptoms

Fatigue

Tachycardia

Tachycardia, a rapid heart rate, is caused by an abnormality in your heart's electrical impulses. Tachycardia can cause serious complications, including sudden cardiac arrest.

Treatments and drugs

Hypothermia: First aid

June 18, 2014