The barbell box lunge is a single-leg strength exercise that targets the quads, hamstrings, and glutes. This exercise also improves core stability.
Situate barbell onto upper back with hands slightly wider than shoulder width. Place instep of your one foot on a box positioned two feet behind you. Your back knee should be at a 90-degree angle and your supporting leg should be completely straight.
Brace core, exhale and descend hips downward until back knee is approximately 6-8 inches from floor. Keep back straight and do not let your front knee extend past your front toes. Pause then retract back to starting position.