. A better term would be controlled bubkas. Theres a range between being static (not moving at all, think about how you stretch) and dynamic/explosive. Try training your 'bubka' muscles through all stages, holding your legs out at 90 degrees, slowly going through bubkas (technically dynamic), and swinging bubkas (very dynamic). As the season progresses, the more you focus on purely dynamic the less conditioning it will be and the more vault-specific it will be. Must be the intro kines/biomechanics classes im taking, but i thought id throw that out there.