Fitness Friday: Treadmill HIIT workout:

High-intensity interval training (HIIT) describes any workout that alternates between intense bursts of activity and fixed periods of less-intense activity or even complete rest.

This treadmill “HIIT” workout is great for winter days, it will help you beat the boredom, improve your aerobic capacity and burn more calories with only 30 minutes of speed and heel intervals.

The workout is design for all fitness level; you can work at your own pace adjusting the intensity accordingly. Have fun!