Related Clues:
- A tiresome person comes back in charge of vigorous exercise
- Pertaining to oxygen
- Boring Herts town for one to live in
- Grin -- it's shattering, shattering!
- Old boy, somehow I race around -- is the exercise this?
- Writer's block previously related to exercise
- A lover is short with bachelor in charge of one of the exercises
- Fading fast
- Wearying, exhausting
- Like some CrossFit elements
- It's exhausting for Manx couple from wedding band
- Like exercise that gets the heart going
- Workout category
- Growing weary
- Turning it round is laborious