The rotational single-leg squat is an advanced squat & pull variation, that addresses all three planes of motion. The rotation at the hip and low back requires superior stability and balance.
The single-leg squat & shoulder flexion is an intermediate level, compound exercise. It's a great exercise to strengthen the whole posterior chain together with balance, stability and single-leg strength.
The standing lateral bend strengthens the obliques and the muscles at the lateral side of the torso. This exercise is suitable for all fitness levels.