Take part in the Teenage Cancer Trust Squat Challenge and as well as raising money for a worthy cause, you'll also bag a free tee.
This challenge involves doing 2,800 squats (that's just 100 squats a day!) throughout the month of February and you can get your friends and family to sponsor your efforts through a Facebook Fundraiser.
If this sounds like something you'd like to be part of, click our Claim Mine Now button below and it'll take you to the challenge page on the Teenage Cancer Trust website.
There you'll find a link to sign up, to the Facebook group that you can join for support and advice and a link to let them know what size t-shirt you need. Be sure to fill in both forms and join the group to get all of the resources you'll need to ace this challenge.