The bodyweight squat is the foundation of lower body training. It involves lowering the hips until the thighs are parallel to the ground or below, then standing back up. The primary muscles worked are the quadriceps and glutes, with secondary engagement from the hamstrings, adductors, core, and calves. Proper form requires keeping the chest up and the knees tracking over the toes. Squatting through a full range of motion develops complete muscle growth, joint health, and functional strength, while partial reps build strength only in the trained range.
From a basic squat, several progressions build toward advanced single-leg work. The squat progression typically moves from an assisted squat holding a support, to a box squat, to a full bodyweight squat, then to a close-stance squat, split squat, Bulgarian split squat, shrimp squat, and finally pistol squat. Each step changes the leverage or adds asymmetry, demanding more strength, balance, and mobility. Full range of motion is the goal at each stage: thighs should reach below parallel rather than stopping at parallel, which ensures balanced development.
The pistol squat is a single-leg squat performed with the non-working leg extended forward. It requires significant single-leg strength, balance, ankle mobility, and hip flexibility, making it one of the most advanced bodyweight leg exercises. Progressing toward a pistol squat involves a structured path: begin with an assisted pistol holding a support for balance, then a pistol squat to a box with the box height decreasing over time, then a negative pistol with a slow controlled descent, then a partial range pistol, and finally a full pistol squat. Working on ankle mobility and hamstring flexibility simultaneously is essential, since both limit depth and stability. Pike compression work, which combines hamstring flexibility with hip flexor strength to fold the torso onto the legs, supports this goal and is also useful for skills like L-sits and press handstands.
Two important intermediate single-leg variations bridge the gap between standard squats and pistols. The shrimp squat involves squatting on one leg while holding the other foot behind you with the knee bending back. Unlike the pistol, the rear knee eventually touches the ground, which changes the demand and emphasizes balance, quad strength, and hip flexor flexibility. The Bulgarian split squat is performed with the rear foot elevated on a bench behind you while doing a lunge. It develops single-leg strength and hip stability and is widely used as a stepping stone between standard squats and pistol squats. Together, these variations train the legs through varied ranges and asymmetries, building the strength and control needed for advanced skills.