HOW TO : train on your SUPsurf !!!

To be a better SUPer, you need to paddle better. So you must paddle on flat water to.
Some have choose to paddle on race boards. Some like Coolas prefer paddle on their surf SUP to know it perfectly.
Coolas found a nice trick, adding a Keel fin symmetric in the center box to kill the row effect. SUPer : Coolas en GONG SUP Final XTR. Source : Team GONG SUP, stand up paddle training.