Currently the biggest challenge of the year is under way. 120 days to complete 50 classes. Starting 1 Nov and finishing on 28 February. Plus every month has got an additional (optional) challenge. In November it was drinking a green smoothie every day and December is #planking4xmas where we started from a 30sec plank and then added 10 sec every day to finish on a longest plank you have ever done on 31 December.
If you want more details please check the relevant blog entries: http://spinbella.com/2015/10/04/if-it-doesnt-challenge-you-it-doesnt-change-you-izabelas-50-class-cycle-smart-challenge-is-back/ or contact me.