How do you guys set these up when using heavy dumbbells? Right now I just use my thigh to lift one at a time, but that feels dangerous and my starting position ends up being the dumbbells by my chest and not at the top of the ROM. It feels dangerous doing this because kicking involves my hips and glutes, which I've hurt by doing this before and you kind of remain at a curling motion when getting the dumbbells up too.