Ah yes, 'stopped ME bouncing' would perhaps have been a better description, sorry. In fact I think they've stopped automatically bending much because they don't easily bring me back up. (Thank you, j08, for your efforts on my behalf, though!) Despite being fairly agile, I land sort-of stiff-legged and this decrepitude didn't seem to happen as a result of anything except ageing. <WAH>
I'm thinking about what happens when I jump off something, e.g. from a yacht down on to a pontoon, or even just launching myself off a high step. There's no elasticity and I find myself using avoidance tactics
I care less about why it's happened, than what I might do to regain knee control!