It's time for another challenge!

It's 2013, a new year and the perfect time to start fresh, something these two sisters need after completely failing the last challenge. We both still live in Scandinavia, it is still winter in Scandinavia and thus a new outdoor challenge would be a big fail. So lets go inside!

I have a gym membership that has been poorly used over the past few months, and I happen to know that my sister has easy access to a gym as well!

Endomondo doesn't work when sitting still on an excercise bike, however the same bike do have displays that shows how far one has biked - and that can be immortalized with a simple picture!

Dear sister, here is the very basic challenge,

Who can bike the most kilometers in the month of January, starting today!