No need to argue that good female gymnasts should be well trained for acheving maximum results. Even better when these gymnast girls can train each other - this saves lots of time and makes process of training so wonderfull, exciting and effective. These two girls are obviously trained very well: They perform for each other and train each other’s flexibility. I’m not sure if these clothespins and other stuff is neccessary in training process, but the girls seems to be doing good gymnastics anyway. Take a look at this gallery:

Enjoy!