(Medical Xpress)—High-intensity interval training (HIIT) is touted as the fastest way to get lean, but according to ground-breaking new research from the University of Sydney's Charles Perkins Centre, ...

Traditional long distance running can be time consuming and usually doesn’t involve higher intensity sprints. Interval running can help you achieve results while still fitting your lifestyle needs.

Most solid training plans include a weekly speed workout, often in the form of intervals. But the length of those intervals usually depends on your race distance, training goals, and fitness level.

Consider speed a goal that never goes out of style. Whether you have a (likely virtual) race on the calendar, or you’re just bored with your run routine and need a new challenge, intervals should have ...