From Blue Paddle Surf:
Interview with Connor Baxter on SUP paddle length and stroke technique at the 2017 Starboard distributor meeting on Maui. I asked Connor about his new 2017 paddle design that I can’t show yet. I can show the parts where he talked about paddle length:
His paddles are much shorter than when he first started competing
And stroke technique, he breaks down his unique stroke technique which focuses on using the bigger muscles in the core and legs and less upper body strength for endurance racing. He also talks about loading up and releasing the paddleboard by “porpoising” while sprinting. He also talks about choking down on the paddle and leverage.
Clearly he is doing something right since he is winning a lot of SUP races using this technique.