Barbell Cossack Squat

StrengthMobilityBalanceFunctional

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Body Part: Legs

Description

Stand with a wide stance and rest a barbell securely across your upper back. Shift your hips to one side, bending that knee while keeping the opposite leg straight and the heel on the floor. Keep your chest up, spine neutral, and the bent knee tracking over the toes. Lower under control as far as mobility allows, then drive through the bent-leg foot to return to the starting position and repeat on the other side.

How to Perform

Set a barbell in a squat rack at upper-chest height and load it lightly. Step under the bar, place it securely across your upper traps or rear shoulders, grip the bar firmly, brace your core, and walk back carefully into a wide stance with your toes turned slightly outward.
Stand tall with your feet wider than shoulder width, keep your chest lifted, and distribute your weight evenly through both feet before starting the movement.
Shift your body weight toward one leg while bending that knee and pushing your hips back and down. Keep the working foot flat on the floor and allow the knee to track in the same direction as the toes.
As you descend, keep the opposite leg straight and extend it out to the side. Keep the heel of the straight leg on the floor if your mobility allows; otherwise, allow the toes to point upward while maintaining control.
Lower only as far as you can while keeping your spine neutral, chest proud, and the barbell stable over your mid-foot. Avoid rounding your lower back or letting the working knee collapse inward.
Press firmly through the heel and mid-foot of the bent leg to return to the starting wide stance, keeping your core braced and the bar level throughout the ascent.
Repeat on the opposite side, alternating sides for the desired number of repetitions. Re-rack the barbell carefully when finished.

What Muscles Work

Primary Muscle:

Secondary Muscles:

Tips

Use a light barbell at first and place it securely across your upper back in a high-bar or comfortable back-squat position, keeping your torso braced before each repetition.
Set your feet wider than shoulder width with toes turned slightly outward, allowing enough room to shift fully into each side.
Shift your hips toward one leg and bend that knee while keeping the opposite leg as straight as your mobility allows.
Keep the working foot flat on the floor and track the working knee in the same direction as the toes; do not let the knee collapse inward.
Keep your chest proud and spine neutral rather than rounding forward to reach depth.
Let the straight-leg foot stay planted with the toes pointing upward or forward according to your hip and ankle mobility, without forcing an uncomfortable position.
Descend only as far as you can control while maintaining heel contact, knee alignment, and a stable barbell position.
Drive through the heel and midfoot of the bent leg to return to the starting position, then repeat smoothly on the other side.
Move slowly and avoid bouncing at the bottom, especially when learning the exercise or using heavier weight.
Stop and reduce the range of motion or load if you feel sharp pain in the knees, hips, groin, or lower back.