Hi all, I've been increasing my mileage recently and have noticed that the area at the bottom of my neck/trapezius muscles gets quite tight and painful for the last hour or so of the ride. I guess this is partly a result of increasing mileage from low 30s into the 60s and 80s and so will presumably settle down as I get more used to the distance, but does anyone have any top tips or am I doing something wrong? For info, my bike is a Cube Agree and fit is fine. I switch position fairly regularly between tops, hoods and drops. Thanks.