A trainee can touch his toes. Top 10% on the sit-and-reach. He cannot squat to parallel under any meaningful load.
He has flexibility. He does not have mobility. The training that builds each is different — and most of what gets sold as "mobility work" only trains one and labels it both.
Inside this one
- The mobility-vs-flexibility distinction the industry refuses to make cleanly
- Joint-by-joint framework, with the seven joints named and roles assigned
- Pre-lift static stretching: why the evidence buried it in 2012
- Stretching-prevents-injury: why the evidence buried it in 2014
- 5-10 minute daily mobility routines targeted to actual deficits
- Strength training through range as the most reliable mobility intervention
The standard it is held to
Every factual claim in this volume names its source, and every claim carries a confidence grade — settled, strong, emerging or contested. Where the evidence is thin, the text says so. How it’s made, in full → · What we’ve got wrong →