As I sit here writing at the end of a long day, I am literally aching to move. For the past few days I've had constant cramps, both when lying still and when moving: my physiotherapist has discovered a muscle spasm in my lower back, which – because it's pinching a nerve running down to my left thigh – has put an abrupt end to my favourite activities.

I feel tense and tight, but moreover, lack of sleep has sent my motivation plummeting to new depths of the sofa. Tossing and turning in bed, sitting cross-legged and propped up, this pain and the subsequent stress I feel isn't showing signs of letting up soon.

But it has got me thinking about mindful movement.