We have touched on gluteal amnesia and poor core strength as two culprits in hurting your kettlebell swing. The third thing that is very often a problem is slow hip drive. The kettlebell swing is not supposed to be a "slow-controlled" movement. To reverse the kettlebell arc between your legs, there should be a fast, powerful, and VISIBLE hip drive. Your hip should "POP!" forward, faster than you can say the word out loud! Start popping!