Today it's -19 degrees and there is no way I plan to go outside for a run. The alternative will be yoga, and that's what I plan to do.
When factors outside your control make it more difficult to do what it is you are supposed to do, then you need to have a list of acceptable back up plan. Here is my top 10 list of alternatives to a run:
yoga
weights lifting
meditation
next race plans
dance
deep cleaning
website maintenance
paint a room
bake
craft
