Sprinterval is a six-week High Intensity Interval Training (HIIT) program using sprint intervals. The program gets a little bit harder every day as you gradually increase your work-to-rest ratio.
HIIT with sprints lets you burn fat without losing muscle. You'll get through your workout in about 15 minutes, but feel the effects all day long.
Finished Couch-to-5K and looking for what's next? Trying to speed up your 5k or 10k times? Just looking for the best way to get in shape and lose wait? Sprinterval is the answer.