I had a few months ago wanted to stay with running because it kept my back good and also gave me more energy to go about my day. I strayed though, as I always eventually do, into trying to run much faster while completely losing sight of these primary goals. I started trying to train like Roger Bannister with the result that my right knee has been hurting increasingly with faster speeds. Also with sacrificing longer distances for shorter speed interval training, my back wasn't feeling as well and I totally lost that feeling of energy.
In fact I even lost the interest/energy to do this right here, bother typing my thoughts. Also my cello playing hasn't been so good.... So today I went for a continous 20 minute jog for first time in at least 3 weeks, probably more, and here I am with increased energy to bother doing such a thing as typing all this down. Which isn't to say I'm correct to be bothering typing all this down....
I ran today despite the right knee pain I've been having. At this much slower speed it felt OK.... I'm still hoping other strengthening exercises will fix the matter but it's not looking so good. I did run today because I woke up with back pain, which is as it was previously before I had gotten back into running.
So then, for now, a 20 minute run 3 or 4 days a week hopefully, followed by 10 to 20 minutes on this wonderful exercise bike I recently bought, followed by 5 to 10 minutes of working my upper body on the exercise bike by tipping it on it's front side.