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I've decided to take up running more seriously as work commitments have meant I've had to take a break from playing rugby. I'm relatively fit and am about to start a 16 week training plan to hopefully get close to a 1.30 half marathon in march.
I've read alot about increacing milage slowly to avoid injury. I'm finding that after a long run my left knee is painful especially walking up and down stairs for the rest of the day. This passes and I'm ready to run the day after pain free.
My question is, how much discomfort is normal after a long run? Is this expected? Don't want to get injured before I really start. Currently on about 20 miles a week.