Originally Posted by
Brian Ratliff
From an aerodynamics standpoint, a less-than-90deg angle on the upper arm is more aerodynamic (superman position). However, I don't know how this affects power production.
Not necessarily, and especially not in a UCI complaint position or something close. A lot of other variables in that equation. short answer is pulling your elbows back a bit in what you're showing us could improve CdA, and will most likely improve both stability and decrease your fatigue curve for your neck, arms, and shoulders.
A front shot would be helpful.