Just had a quick look at the c25k team - there are 22 of us now!
In case anyone else wants to join us, I've copied a bit from the earlier blog below.
It's linked to Comic Relief (£5 min donation to register, but you don't have to fundraise beyond that - it's ok to do it just for fitness). The challenge is to be physically active for 30 minutes (ideally 5k) every day for 50 days - 31st March to 19th May.
Now it does say, "Run, walk jog or cycle 5km a day for 50 days" - however, if you read around a bit, you'll find that it is ok to interpret '5km a day' to be '30 minutes of active exercise a day'. So you could walk/swim/zumba/cycle or anything else instead. Plus, the 30 minutes doesn't have to be all in one lump - so a short lunchtime walk could count.
And even if you've only just started c25k, you can register (you might have graduated by then anyway!), as even week 1 is being active for 30 minutes - you could walk, swim or bike on alternate days.
Register on here: 5x50.co.uk
Do be warned though, it's quite easy to overdo it - if you've been doing very little exercise, suddenly jumping to 30 minutes every day can be very tiring (especially if some days you get over-enthusiastic and do more than 30, or push yourself crazy-hard, as some/most of us tend to do!)
Signs of overdoing it - feeling constantly exhausted, as if you're coming down with flu/cold and quite possibly very low mood. Go easy to start with - get fit, not worn out!