Today NPR Health added to evidence in favor of the benefits to running intervals in this story.

The story describes research which used 20 minute workouts on stationary bike to assess health effects of intervals. In the study participants alternated between 12 seconds of relaxed cycling broken up by 8 second bursts of fast peddling. In one study improved blood pressure and blood sugar ratings and shed an average of six pounds of body fat. On the flip side, people who pedaled at a steady pace without mixing in sprint intervals lost three times less fat.

Listen to the whole story on the advantages of interval training from NPR.