Tobogganing /sledding could be rough enough to misalign your c1,c2 (atlas /axis @ top of Cervical spine) for sure and that can cause some issues....
You may notice shoulders, hips, knees not level if c1 c2 is misaligned for awhile.
If you look into upper cervical chiropractic care, your symptoms may fade away..
We have info in the sticky threads at top of main PCS page.

Did you hit or collide into anything overly hard with shoulders, head while tobogganing or anytime in your life??