Well, I hadnt cycled to work since Thursday last week and it was my fiancees birthday at the weekend so it was a case of "out for dinner every evening".
Cycling to work this morning I found it really difficult - weird how a couple of days of over indulgence can affect you so badly! Best thing about it is, I only had a "drink" on Friday (ok, so i had 3 or 4 drinks on friday... ok OK, 6 or 7 drinks then!).
My main problem was kinda like a fatigue - I really struggled with the hills, my legs were't interested.