Beach cat racing has always been about size and weight, that's why we have so many different classes, it was never a "One size fits all" sport, but then few physical sports are, and going to the gym helps too, cat racing is somewhat phisical when it's blowing!
Why do you think Tiger Woods was kicking fat old farts butts when he first showed up on the golf course? Because not only did he know how to swing a club, he also went to the gym. But look at him since he got married, had kids and got divorced, put on 30lbs. and started going to the nightclubs instead of the gym...