Hi Nigel,
I am so very sorry that your pain went crazy. I find it strange that the doctor increased the dosage and yet you still felt normal?? Wow, that is a bit strange with ketamine. I have spent majority of the last six years bedridden and esp in the last 10 months and have found that doing stretching exercises in bed are great for building up the strength in your body. I even use my cane in one of the exercises while lying on my back by just pressing up and down with it (you can even use soup cans...one in each hand and I have actually used my Bible as a weight too)!! It may be a small thing to do but you have to start somewhere. You were able to do so more beforehand and had built yourself up so really try not to lose all you have done that is good for your body. If you can't move your knee then don't do so but move your ankle up and down and do circles with them. It is amazing how ankle pumps and doing cirlces with them can really build up your shins not to mention it is good for circulation. Just try to do what you can with the rest of your body. I actually exercise at midnight since it is the only time of the day my pain is lessened a bit and I have more focus...crazy but at least I do it.
Best of luck and stay focused and try to stay positive.
kathy d