Originally Posted by
patentcad
You have just discovered one of the major benefits of doing TTs with a PM. It reminds you to keep the watts cranked on downgrades. As you noticed, they watts naturally drop off quite a bit unless you focus on sustaining them, and this can cost you quite a bit of speed in a TT.
I get that and the pont in the post above.
I do ease off on the downhill but I see this as recovery during the TT. I ride off my HR only (not speed or power). I don't / can't maintain high HR throughout the ride so I consider slight downhills as respite.
Is the most efficient approach to keep power constant?