i've been running very intermittantly for the past 3 years, so that i can run the race for life each summer. this year i've decided to keep going on the running and enter the london marathon.
i swim 3 times a week (with a club) and run 2 times a week. one long run (4.5miles) and one short(2.5miles). i run at about 11 minutes a mile. i'm trying to add 0.5miles to my long run each week. this is quite a significant increase in training from 3 months ago when i was swimming once a week and runing 1.5-2 miles once a week. am i overdoing it?
i've started to get a really stiff upper back when i run. it's not painful just uncomfortable. i also get a mild stabbing pain in my left knee which i can run through. any thoughts on what these are caused by?
you should probably know that i'm pretty overweight 5ft 1in, 12st 11lbs and have lost 16lbs in the past 17 weeks and hope to keep going!