Fitness and Flare Ups, Not to Worry
If a flare up happens, some pre-existing, physical concern, such as a knee that's been bothering a person for a while, will become aggravated. That might mean that the area becomes acutely [...]
Don’t Underestimate the Strength Needed for Ordinary Activities
Descending stairs (and presumably walking down a steep hill) requires 90 degrees of knee flexion ability. 90 degrees would mean that your shin becomes perpendicular to your thigh bone.