I need to fond information about which group of muscles is the most important to develop or to be measured in order to a higher performance in basketball.
To analyze an individual muscle (or a couple) for a functional movement is a bit difficult...
However, you can analyze the followings. For jumps, you can analyze quadriceps, glutes and gastrocnemius muscles in the Counter Movement Jump (CMJ). The huge part of the basketball jumps have a very important elastic component. And for sprint, you have to add hamstring muscles too.