OK, so I got my first-ever road bike (Lemond Tourmalet) on Thursday, and I've taken it out each day since for rides averaging 15-16 miles. I love it. But I'm finding that in addition to the expected soreness (butt, hands, etc.), I'm getting a fairly distinct ache - almost a burning sensation - in my upper back, between my shoulder blades. I'm sure this has to do with the position which is a new one for me. Does anyone have any suggestions for stretches or exercises I can do to strengthen this area so that the pain will cease? It gets pretty bad after 10 miles or so, and next week I have my first organized ride (30 miles). I'm worried it will be very painful after 20 or 25 miles. Any wisdom would be appreciated. Thanks!