Being strong will inevitably make you heavier. In a game like basketball, a lot depends on speed + elevation. When you are heavier than others, you can pick and choose one or the other, you can't have both, which is why lebron james is such an amazing athlete. I have realized that when I am running in at 100 mph, i can't get up at all, but if i do a jump stop, i can get some elevation. So should i get real skinny and sacrifice strength?
Also, having flat foot or fallen arch, is that why it is hard for me to get reactive strength, like SLRVJ?