Single Leg Stance (SLS) is the most important — and most overlooked — movement pattern in functional training. Whether you’re walking, running, climbing stairs, or picking up your kid, you're spending most of your time on one leg. Your ability to balance, stabilize, and generate force in single-leg positions directly impacts your strength, joint health, and injury risk. That’s why mastering the mechanics of SLS is foundational. It demands more from your hips, core, and feet than nearly any other pattern — and without a solid understanding of how to position and load your body properly, compensations creep in fast. In this lesson, we break down exactly how to approach SLS with confidence, so you can build strength that actually shows up in your everyday life.