The double Bosu plank-up is an advanced core exercise. This is a challenging exercise that strengthens and conditions the core. This exercise is suitable for advanced fitness levels.
The double leg drop cable pullover is an advanced core exercise. This is a great compound exercise that not only targets the core but also the back and the arms.
The double leg drop with the stability ball on the bench is an intermediate abdominal exercise. This exercise requires alot of abdominal strength as the stability ball increases the difficulty of the exercise.