Wrecked thighs!

My thighs felt incredibly stiff this morning and have done all day. I am even having trouble walking downhill and so I just had a nice steady 2 miles on the cross trainer to try and loosen them up a little. Fartlek tomorrow where my legs will hopefully be in better shape.
I've found my bag too. The £250 worth of kit is safe thank goodness. I think I'm having problems with my compression socks - everytime I wear them whilst I run my calves seem much stiffer and lactic acid filled than normal. Surely this shouldn't be happening - anyone got any comments?