We dare you to try this one out, but it won't be easy...be prepared to work up a sweat, and feel the burn!
5x a week
for 15 minutes*
at an effort of 70 or above
*Workout minutes can be completed all at once, or accumulated throughout the day (12AM-11:59PM)- but remember for effort challenges, only time spent working out at the minimum effort or above will be credited towards the challenge!