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

Fatigue can signal many things. Here are some tips to help you decipher why you're wiped out and to regain your energy.

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