A very popular and common exercise performed during training sessions is the dynamic lunge. It requires hip, thigh, and trunk strength/stability in all planes of movement, thus a very functional movement! It also requires neuromuscular control and hip and pelvis dissociation due to having to let your hips flex while minimizing pelvis and spinal motion.
Depicted are two correct repetitions performed followed by two common mistakes we typically see; a rep lacking hip stability - knee valgus and another rep lacking trunk stability - excessive trunk flexion. It is easy to fix these common neuromuscular control errors by utilizing a mirror in front of you and/or a mirror to the side of you for a visual cue to achieve optimal performance of the exercise