You can condition amd strength train all you want but there are only so many injuries it can limit, not prevent. Hamstring injuries cam be limited, but can still happen especially if over done. Knees, nope, no matter what anyone says, you can't do much about thoae injuries. Feet, fingers, toes, nope, only make them more susceptible. Dislocations? Yes, you can limit them, but then, if you are prone to them, you are out of luck. Back injuries? To some extent yes, strong core and back muscles help protect the spine, but a disc will go whwn it is time to go... The biggest impact from the proper training is in, as Max said, late in games, late in the season. Minor injury recovery as well, stronger tendons & ligaments but they too can be over worn.