I'm susceptible to the neck and shoulder pain myself. I read somewhere that this is a problem area for 60% of women cyclists. I don't think office computer work helps, either. In addition to watching my posture while riding, I do a lot of stretches that help. My chiropractor got me doing "wall angels". They've made a huge difference. I also do a lot of yoga that targets that area. Unfortunately, I've discovered that nothing helps in the 48 hours before my period starts. PMS is a fascinating phenomenon.