I run 5k every Saturday, and 10k mid week. I walk a lot, cycle a bit.
Never, ever had any issues with injury/pain.
I hired a PT for tips on how to improve running and get faster. He had me doing squats and resistance training. The next day I noticed a sharp stabbing pain in my knee when I was walking to the shop.
Odd. It's been on/off all week.
A week later (today) I had a Bootcamp fitness class and my knee was twinging but okayish, until I did another squat. Holy shit it hurt. Now it's hurting just walking around the house. I've RICE-d it but it's still twinging.
What the hell is wrong with my knee? I have my first fun run this Sat and a quarter marathon next month, I can't be injured. Please help :(