Pain/Bike fit

[maillotpois]

Don't forget also handlebar width. I have wide shoulder for a woman, but still have somewhat narrow bars.

Second the recommendations for a fit and/or having someone who knows what they're doing look at you on the bike and see if there is something obvious going on.

Also, be aware of keeping your elbows bent slightly - not locked straight. When they're locked straight, all road noise is transmitted directly up your arms to your neck and shoulders. Let the elbows act as shock absorbers. This is one thing I find myself constantly monitoring with my TNT peeps.

[RoadRaven]

I am assuming you are not too low... in my time trial position, my shoulders ache.

I am guessing though it is probably what others have said... check your reach, check the width of the handle bars, and if you are still building upper body strength then consider raising the height of your bars temporarily.