Turn The Back Heel Out In The Split Jerk
In the split jerk, turn the back heel out slightly to maximize stability.
Because the back leg is extended away from the hip at an angle, if the back foot is pointed straight forward, the foot is not in line with the lower leg. This means it’s less stable when pushing against the floor and more prone to spin or roll.
By turning the heel out enough to align the foot with the lower leg, we can load the back leg as much as needed with a solid connection between the balls of the foot and the floor.
Imagine pushing the back heel out along a slightly diagonal line to get the foot aligned well; this will also help create a wide enough split for better lateral stability.
Video by Hookgrip