ALL ABOUT INTERVAL TRAINING. The science behind it, this is a really helpful artical.
Want to increase your fitness level and burn more calories? Try our 24-minute interval workout. You've got this! #TheColorRun
Get sweaty with this easy-to-follow high intensity interval routine for major results. | Health.com
This is awesome for me
Beginners Guide To Interval Training! This gives explanation to what interval training is and it also provides workouts to do! Burn fat and blast calories with interval training!