Enough is enough, I decided yesterday. Over a year of trouble with my left knee, trouble which comes and goes like an irregular tide, with occasional visits to the doc who tells me there's nothing wrong...

'There IS something wrong,' I tell him today. 'I can't do my child pose properly, and the camel pose kills more than usual, and I can only do half a sun salute! And LOOK at it! It's fat and knobless! Compare it with the knobbly one!'

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