January's always a good time to review your fitness regime and if you're fed up with the gym (and are in possession of some warm trackies) there are a whole host of outdoor activities around the UK which you can get involved in. Fit For A Princess is a London-based organisation which co-ordinates boot camps, outdoor workouts and personal training sessions in Clapham, Fulham, Wandsworth, Battersea Park and from February, in the City. Nationwide, check out Virgin Active's Outdoor Active classes.

fitforaprincess.co.uk
virginactive.co.uk