Drill for Markelov
Set a spring board up in front of a low bar, on the other side of the low bar have a stack of mats up to about one foot below the bar. Have gymnast run and jump from spring board, block off the bar in a hecht motion and perform a half turn to feet on the stack of mats. The drill can then obviously be tweaked so the entire Markelov can be achieved from the jump over the bar and onto the stomach on the stacked mats...best drill I have seen to perform this relatively easy trick.