Half way through a skiing holiday. For the last 4 days I hired Dynastar Legend Sultan 80s (didn't note what the bindings were), 172cm length. Moved to a different resort this morning and hired Fischer Watea 78s, 167cm. Theoretically similar skis, and they didn't feel hugely different to me (I was skiing exactly the same way on them), but I found today I was really feeling it in my thigh muscles, as if I wasn't skeletally stacked. What might the difference be? Binding angle (if so, higher or lower?). Or binding position? Or something else? I happened to have a couple of little heel lifts in my pack which I put in my boots (under the footbeds) and this seems to have improved the situation but I haven't skied enough since to know yet if something else might have been adversely affected.
Just curious, as this is the first time I've experienced this phenomenon.