Cossack Squats Build Quad Strength and Mobility

The Cossack squat is a bodyweight exercise that efficiently builds leg muscle and mobility simultaneously. According to a guide from Men's Health, this lateral squat movement challenges the quads, glutes, and inner thighs through a wide range of motion without requiring any equipment.

A Cossack squat is a deep lateral squat performed from a very wide stance. Instead of dropping straight down, you shift your body weight to one side, bending that knee while keeping the opposite leg completely straight. At the bottom of the movement, the working leg is in a deep squat position and the extended leg is stretched, often with the toes pointing upward.

You then push through the foot of the bent leg to return to the starting position before repeating the movement on the other side. The combination of single-leg loading, depth, and lateral movement makes it more demanding than a standard wide squat.

Key Benefits of the Movement

Cossack squats train the legs using only bodyweight by concentrating most of your mass onto one leg at a time. This increases the work for the quads and glutes. The movement also builds strength and active mobility together, as you learn to produce force through deep ranges of motion in the ankles and hips.

Moving laterally brings the inner thigh muscles, or adductors, into play. These muscles lengthen on the extended leg and help control the hips. The exercise also improves balance and coordination by requiring you to continually shift your center of mass from side to side while maintaining control.

Muscles Worked

The exercise engages multiple muscle groups through its unique movement pattern. The primary muscles worked are listed below.

How to Perform Cossack Squats

Start by standing with your feet much wider than your shoulders, toes pointing forward or slightly outward. Create tension through your trunk. Shift your weight toward one leg, bend that knee, and push your hips down and back as you descend. Keep the other leg straight.

Sink as low as you can while maintaining control, keeping the entire foot of the working leg on the ground. Push firmly through that foot to stand back up and return toward the center. Repeat on the opposite side. You can stand fully between reps or stay low to keep tension on the legs.

A coach's note from the source advises against prioritizing extreme depth over control. If your heel lifts, your knee collapses inward, or you are falling into the bottom position, you should reduce the depth. Holding onto a stable object can help when learning the movement. Once bodyweight versions become easy, holding a weight like a dumbbell at your chest is a progression, but the source cautions not to rush to add load.