Originally Posted by
cubewheels
What makes forward position more comfortable is by reducing upperbody weight (quit all strength training with your arms and chest), core muscle exercises, and by increasing your average power output. All these changes helps unload your arms.
No need to do yoga for that although yoga is still useful (in general) for cycling.
This is good advice if your only goal is a more comfortable forward position. At 77, I strength train muscle groups including arms and chest because it is recommended for maintaining bone density in old people like me. I also do yoga mostly after rides. Shoulder stretches seem to help with pain/discomfort from riding. I agree with Maleochs that I tend to put more weight on my hands toward the end of a long ride. I tied a bit of bright ribbon to my handlebars reminding me to keep my core strong and shoulders relaxed.