Lunge with one kettlebell punched overhead for total control.
Keep your wrist stacked over your shoulder and your core tight to fight the side pull.
The lunge itself is a quad and glute exercise, the front leg controls the descent and powers the stand while the glutes keep the hips level. Locking one kettlebell overhead changes everything above the waist, your whole trunk has to resist the sideways pull of the offset load while the shoulder holds a stacked, stable lockout. Because it is one side at a time, it exposes and fixes left to right differences in both leg strength and overhead control.
The bell overhead raises your centre of mass and sits on one side, so every step is a balance and bracing problem as well as a leg exercise. Expect to use a fraction of your usual lunge weight.
Standard practice is to hold it opposite the lead leg, which creates the biggest stability challenge through your trunk. Same side is a fine variation, just be consistent so both sides get equal work.
End the set, a soft elbow overhead under fatigue is how reps get ugly. Drop to a lighter bell and treat the locked, stacked arm as non-negotiable, wrist over elbow over shoulder the whole rep.
