Без заголовка

Это уровень «общедвигательной», «телесной» (не общефизической!) подготовки, только маргинально известный сегодня в обществе Маргинально известной, потому что само направление маргинально. Википедия:

Myofascial release Myofascial release (MFR) is an alternative medicine therapy that claims to treat skeletal muscle immobility and pain by relaxing contracted muscles, improving blood and lymphatic circulation, and stimulating the stretch reflex in muscles.[1] [...] The use of myofascial release as a treatment is not supported by good evidence, and using it as a replacement for conventional treatment risks causing harm.[2][3] [...] The poor quality of research into the use of myofascial release for orthopaedic conditions precludes any conclusions being drawn about its usefulness for this purpose.[3] [...] Reviews published in 2013 and 2015 evaluating evidence for MFR efficacy found that clinical trials that had been conducted varied in quality, technique, outcome measurements, and had mixed outcomes; the 2015 review noted: "it is time for scientific evidences (sic) on MFR to support its clinical use."[3][9] https://en.wikipedia.org/wiki/Myofascial_release

Сам Майерс в своей книге пишет:

What the Anatomy Trains is not [...] A scientifically supported theory The concepts in this book are backed by the anecdotal evidence of years in practice, and are successfully being applied by therapists in a number of different disciplines. The dissective evidence included in this edition is an early indication that supports the ideas, which have not yet been confirmed by detailed dissection or other scientifically reliable evaluation. Caveat emptor - Anatomy Trains is a work in progress.

Что же касается Physical Therapy/Rehabilitation/Functional Training, то там полно гораздо более практичных и полезных книжек. Например, могу посоветовать:

• Gray Cook - Movement Functional Movement Systems: Screening, Assessment, Corrective Strategies
• Eric Cressey - High Performance Handbook
• Kit Laughlin - Overcome Neck & Back Pain
• Michael Boyle - Advances in Functional Training: Training Techniques for Coaches, Personal Trainers and Athletes
• National Academy of Sports Medicine (NASM) - NASM Essentials Of Corrective Exercise Training