Jogger blogger update ...
Purchase a pair of proper running shoes (the least garish, which isn't saying much) after having been warned by several hardcore runner colleagues that you can really do yourself a mischief in the wrong footwear. Nothing seemed cheap but assuming I get a hundred runs out of these shoes it will work out cheaper than the pool membership.
I walk out of the house at 3:45 & go up to the woods. There I decide to try C's approach: a constant faster-than-walking pace but not so fast as to get you out of breath. I had anticipated that I would give in after three minutes. In fact, it felt ... right. No doubt to a bystander it must have looked pretty pathetic - a short of geriatric trot - but I could keep it going.
I followed my usual walking route up the path & got into a rhythm. After 15 minutes I stopped. Had a 5 minute breather & then retraced my steps. I reckon I must have managed 20 minutes in all. At the traffic lights I slipped back into walking & so home (4:25). Not bad.
Frankly, I am amazed. Never in my life have I been able to do this. I suppose I've always tried to go too fast & the body has said no. & maybe wearing proper shoes helps - cushioning the impact, adding a bit of support & spring to the step.
The advice seems to be give it a rest now - I'll go out again Saturday.