Theoreticallly and I am not an expert at all so i'm just throwing this out there based a novel I read about Pankration - As the Hands are connected to the legs with the Fascia, when you are standing and sprinting the less energy absorbed by a flexy stem/bar gets transferred directly into more leg power.
I know that I can put a lot more force into the pedals by holding onto the bars and pulling on them versus riding with no hands.
Scientists are figuring out that the Fascia provides/transfers a lot more power than previously assumed.
Just a thought and I know I didn't explain this correctly but if the bar is absorbing x watts you are losing that in leg power. I have no idea of how to do the calcs, but Fairwheel has tests of how a bar and stem deflect under a certain load. The watts required to deflect that should be able to be calculated from that.
Is anyone good at math conversions?http://blog.fairwheelbikes.com/reviews- ... ar-review/
First of all, I'd be careful about accepting "science" from a novel as fact.
Beyond that, you need to do more than just convert units. Watts are (force times distance) / time. I did the math (literally) for the Fairwheel crank review here: http://blog.fairwheelbikes.com/reviews- ... k-testing/
I have always wanted to write this: the rest is left as an exercise for the reader.
The really hard quantity to find is the strain energy stored by the handlebar, stem, frame, etc. FEA makes this straightforward, but the tools aren't readily available to most people.
You haven't explained enough about your fascia idea for it to be called right or wrong, but keep in mind that "power transfer" isn't a thing in science/engineering. So if someone is telling you that your fascia is deeply involved in "power transfer," they're deceiving you, themselves, or both. For example, my hands are connected to my legs via my blood vessels, but my blood vessels don't "transfer power" from my hands to my legs. My blood vessels mostly transfer blood.