She decides that her best course of action is to enjoy what she can without causing unnecessary pain. This is a smart choice since she has had arthroscopic surgery in the past and the age consideration. Also she is already acknowledging her knees are bothering her. Best to be safe than sorry.
Proxy because everything else mean different
The 3 healthful ways to relive stress can be:
1) Try a walking medication- inhale as you take 4 steps
2) Try sitting medication- sit on the floor with a comfortable position with a straight look
3) Side to Side- Inhale and extend your arms straight up.
Apart from these 3 as I listed, Try to gibe yourself some "me" time. Spend time with your family, Workout things that you love doing apart from working.
Hope this Helps!