I recently bought a new TT bike (Look 796). In addition to being able to produce less power for similar durations, my HR is about 8bpm higher as is my PE. Have others experienced this? Has it gone away with time?
Try cycling in your regular road bike but hold your bar with 1 hand and a sack of potatoes in the other. You’ll most likely notice an increase in HR and weird sensations.
Any change in position or equipment etc will manifest itself as potentially higher hr or different muscle pain etc, nothing to worry about, you’re just creating a different stimulus on your body. With time your power will get close if not the same as your road bike position and your HR will go down.