Help your knees!! Seriously. I found this ages ago when my knee acted up from squats or even just too much bending in yoga. This is a list with videos and images of GREAT, easy exercises you can do to strengthen the muscles that support you knee, gently! Great to do before bed as these aren't intense, just efficient!
Do you have a history of knee pain? Get those knees healthy again for your outdoor adventure pursuits this summer by trying these exercises on WebMD's Slideshow: Exercises for Knee Osteoarthritis and Joint Pain