When yoga replaces running

Something strange has occurred the past two Sundays. Instead of heading out on planned 80 minute runs I've stayed inside. Sure the weather has played a part in this, last week we saw crazy rain, today enough wind for me to become a kite.
The other reason has been to practice yoga instead. I've always struggled with back and neck issues, not to mention my flexibility is appalling. A friend on Twitter suggested perhaps yoga could work for me.
So now we're a week into a 3 month yoga plan. Like with the running, I've put a schedule together and in theory my running and yoga days shouldn't clash. Paula is also joining in, we'll see if it has an effect in the long term. One thing it's certainly giving me is a lot more clicks and crunches, always a good sign!