Lifting Weights and Board Sizing

People go to the gym to get in shape / get stronger ( pick up girls ).
People surf for fun, exercise, ( pick up girls )
I realized there is a correlation between the two. Guys who show off and don't know what they're doing , get hurt. Guys who try to lift too heavy a weight too soon get hurt bad.
Same for surf boards. Say you start on a 9'0". Work you way down to a 8'0". Move up (or is it down ?) to a 7'2", then jump on a 5'9". What happen to the 6'4" ?
That's almost like starting lifting 15lbs. , then 25lbs. , then 50lbs. , then STRUGGLING to lift 100lbs. What happened to the 75lbs. ?
The more logical, less frustrating and Safer way is to step up in weight gradually. Same goes for surfboard downsizing.
People surf for fun, exercise, ( pick up girls )
I realized there is a correlation between the two. Guys who show off and don't know what they're doing , get hurt. Guys who try to lift too heavy a weight too soon get hurt bad.
Same for surf boards. Say you start on a 9'0". Work you way down to a 8'0". Move up (or is it down ?) to a 7'2", then jump on a 5'9". What happen to the 6'4" ?
That's almost like starting lifting 15lbs. , then 25lbs. , then 50lbs. , then STRUGGLING to lift 100lbs. What happened to the 75lbs. ?
The more logical, less frustrating and Safer way is to step up in weight gradually. Same goes for surfboard downsizing.