The orthopedist told me I was very lucky--if I had hit a little further forward on my shoulder I would have broken something. He rated it as a grade 2 to 3 A-C separation. The bad news is that he wants me not to run for two weeks, and predicts I will be off the bike for 3-4 weeks and not swimming for 6-8 weeks. I told him I can't manage my diabetes without exercise and he suggested using an exercise bike. We actually have an old Schwinn Airdyne that I can ride no-handed, but I'm resisting the idea of being able to do only that. Next week we go for a week's vacation in North Carolina, where I have always loved swimming across the lake. At least I can hike.
The obvious thing to do at home is to walk hills in the morning and ride the exercise bike in the evening. But I'm not ready to be flexible and creative yet.