Here's another photo:



Notice the bent wrist and palms rotated inward so all the weight is on heel of the palm and over the bars. In fact, the hands are inside the bars. Notice the right hand covering the inside of the handlebar so we can't see it. The base of the thumb is exposed and not resting on anything.

The left-hand shows it's inside the bars and the pressure-point is on the outside heel of that hand, as evidenced by the whiter pinched flesh just ahead of the wristwatch.


BTW - this is a pro racer and most people won't have the shoulder & back strength for this amount of reach to the bars. Having the bars 4-6" closer may be more comfortable, but will place more weight on the hands, so you'll also want to raise the bars.