And we're talking about vigourous activity, Liam. So it's true. Liam is lazy in bed.

I don't know about conditioned responses etc. Consuming stimulants would cause a reduction in your ability to get to sleep but then meals in general are slightly soporific (sleep inducing). Meal with high GI have also been shown to be slightly more soporific than low GI meals. So food could be having an effect, but it seems to be small and it seems to be in the wrong direction to Carl's argument that food is keeping you awake.

Small changes in body temperature on the other hand are closely related to the ciracdian cycle and to sleep propensity.

On a personal note I usually had the same problem as AMC. I could eat much after training as my stomach seemed to fill up too quickly. Full stomach- but still hungry. Just couldn't eat enough. That's what it felt like anyway. Couldn't tell you for certain whether it was really happening.