This may be a handy excuse list for anyone in PT:
TOP TEN REASONS I DID NOT DO MY SHOULDER EXERCISES AT HOME

10. It was raining outside.
  9. It was not raining outside.
  8. The weeny dog licks me in the face.
  7. I was hungry.
  6. I just ate and I was too full.
  5. The exercise cane is not straight enough.
  4. It was dark outside.
  3. Seinfield was on TV.
  2. I was bored.
  1. It’s painful to exercise.