These three terms are often used interchangeably, but they mean very different things. In this video, Pieter explains the difference between mobility, flexibility, and stability in simple, practical language.
You’ll learn why flexibility alone doesn’t guarantee control, why stability isn’t the same as stiffness, and why true mobility includes strength and control through range. This video helps you understand why Kinstretch focuses on building usable movement rather than just chasing bigger stretches, and how this approach supports both performance and everyday life.
Up Next in The Foundations
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What “Usable Range” actually Means
Usable range is the range of motion you can actively control - not the range you’re pushed into by gravity, momentum, or assistance. In this video, Pieter explains the difference between passive range and active range, and why owning your range matters more than simply reaching it.
You’ll learn ...
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Internal Preparedness (Why this Matters)
Internal preparedness is the foundation of resilient movement. In this video, Pieter explains what internal preparedness means in simple terms, and why strong, well-controlled joints make everything else easier - from training and sport to everyday movement.
You’ll learn how lack of joint streng...
