It's performed almost exactly like a normal back extension... the lateral pulling tension is going to really hit those small stabilizer muscles of the lower back and spine and help you develop much better spinal strength and stability, while also working the bigger spinal erector muscles. (fitstep.com)
This could be caused by a number of things... using too much weight, weak lumbar erector muscles, letting the hips rise faster than the shoulders, a poor basic deadlift technique or failing to establishing a good first pull (deadlift) before transitioning to the second pull (the jump). (fitnessandpower.com)
Furthermore, Hamlyn et al. (2007) reported that the back squat and deadlift performed with 80 % of 1RM displayed superior lower and upper erector muscle activity compared to the swiss ball superman and side plank exercises. (strengthandconditioningresearch.com)