I find it doesn't take much to break the rhythm, so basically anything that does that.
Take this month. I had a week off, then I went out but a few days later had a very sore and stiff knee (nothing to do with cycling) which kept me off for a week, then we had a few storms and finally I got back out yesterday and woke up this morning with the sniffles. Meaning this month, I've been on the bike twice! If I don't ignore the sniffles, I'm in serious danger of undoing a few months of good work.
I should say I don't commute, which really helps keep you going during such times.
Take this month. I had a week off, then I went out but a few days later had a very sore and stiff knee (nothing to do with cycling) which kept me off for a week, then we had a few storms and finally I got back out yesterday and woke up this morning with the sniffles. Meaning this month, I've been on the bike twice! If I don't ignore the sniffles, I'm in serious danger of undoing a few months of good work.
I should say I don't commute, which really helps keep you going during such times.