No probs mate, glad to see you tried it
stick with it cos it works and the results are fairly quick. alternate pull ups with chins to begin with, and mix in lower body stuff with upper body, chins/sit ups/ leg raises/press ups/ squats/dips etc and keeps the rest periods short for the first few sets then take what you need after that but try limit the whole workout to around 30 mins.
I know what you mean about the running too, murder at the moment. i was out on the hills yesterday bergen training, and today went out for a 3 mile run and fell more today!