I changed to a longer stem and slammed it.
Power numbers equal, lower back felt good but my neck not so good
I can go with the new position for roughly 1.5-2 hours but then my neck starts to burn. Obviously my neck muscles did not like the big change I really want to adapt to be able to hold it for longer rides though.
What is your best tip to strengthen the neck muscles on or off the bike? is it just to ride more and HTFU?