Scary Symptoms: Your source for in-depth symptom information since 2012. Thousands of articles covering hundreds of medical, health and fitness topics including the scariest symptoms.

No Time for Cardio? How to Do Interval Seconds of Running

Interval running might just be the ultimate workout hack, mixing short bursts of your fastest or almost fastest running with recovery periods, giving major fitness results in way less time than traditional cardio. Almost a [...]