My partner decided it would be a good idea to do a 'run every day in May' challenge. Sometimes it might only be 3-4k, sometimes 11-12k, but so far I'm managing it. I went from May last year to March this year really struggling with a succession of chest infections, colds, and injuries, so this is a big ramp up in terms of volume of exercise for me. I've gone from 2 or 3 runs per week (at best), to running every day. She on the other hand, is using it as a gentle kickstart to her New York Marathon training.