I went snowboarding for the 2nd time on Saturday and I've got the hang of it a little better now to where I'm not falling quite as much. I wore kneepads this time because I banged my knees last time from falling forward. Pretty much practiced on my heel edge the whole time, and next time I'll work on my toe edge. When I stand up from sitting or lying down I flip myself on my front side and push up because I cant just grab my board and stand straight up. Most of the time when I caught an edge I fell flat forward or backward but once or twice I got a little twisted up.
I think I might have hurt something on the back outside (and maybe inside too) of my knees. I can feel pain when I bend them. I'm icing them now. Is this a common injury for a beginner? I'm hoping the pain will subside in a few days. Any idea what exactly I might have injured?
Just playing the percentages, you likely strained your hamstring or calf muscle attachments. Bending the knee can cause pain in any portion of the back of the region of the knee, including a couple inches up or down.
Less commmonly, direct impact to the front of the knee can cause strain or tear in the posterior cruciate ligament (PCL) that results in pain in flexing the knee.
Ice the knee on and off as allowed for a couple days. After a week, if you still have significant pain flexing the knee, i.e. it hasn't improved much......then see an orthopedic surgeon. Posterior cruciate ligament (PCL) tears present similarly.
The fact that both knees are affected lends to muscle strain/sprain or bruising.