Flexibility Focus Episode 6: Interview with Dr Sandro Freitas

In this episode, Dan leads you through the fascinating world of cells, beginning with the origins of cellular life on Earth. He explores the emergence of Earth's first basic cells which established the foundation for all current life forms. Through simple explanations, Dan describes cellular components and their functions.Mechanobiology is the primary focus of this episode as an emerging scientific discipline that examines how cells respond to external physical forces such as pressure and stretching. Dan explains how scientists replicate physical forces in order to observe how cells respond to stretching and compression.Dan also answers a question many people who exercise may have asked: Does stretching make your muscles longer according to recent research and understanding? He reviews current scientific studies to clarify widespread misconceptions about stretching while detailing its effects on the human body.

This episode features Dan exploring the molecular mechanics of stretching and explaining the biological effects that occur when we lengthen our tissues. Stretching receives a lot of incorrect information and poor representation on social media platforms where sensationalised messages overshadow true scientific knowledge. This episode establishes accurate knowledge by explaining human body structure and function using biomechanics beginning with molecular components and extending to larger systems.Dan starts with an explanation of body organisation levels from molecular through systemic structures before examining how collagen, elastin and other proteins construct the extracellular matrix and provide connective tissue with strength and flexibility. The study of these molecules helps explain the behaviour of tissues during stretching and adaptation.This episode confronts multiple enduring myths that self-proclaimed "instagurus" have circulated. The episode examines common myths by analysing claims which state "stretching kills tissues" and "stretching is only neural." Dan uses biomechanics and molecular biology principles to evaluate these statements while teaching listeners critical thinking skills for online information.At the conclusion of this episode you’ll gain an improved understanding of stretching mechanisms at the cellular and molecular levels and the necessity of this knowledge for practical biomechanical applications.

In this episode, Dan discusses the growing trend of trainers and therapists misusing quantum mechanics to promote their health and fitness services. He unpacks what quantum mechanics really is: a stunning and complex branch of physics that looks at the behaviour of particles at the atomic and subatomic level. And just as importantly, he explores what it absolutely is not.Dan looks at how quantum myths have taken root in the wellness world and how they’re now being used to shore up some shaky ideas about fascia and human movement. He walks you through why these claims don’t hold up when we shine the light of science on them, and why the popular concept of biotensegrity ultimately misses the mark as a reliable model for understanding how our bodies move.But he doesn't stop at just calling out the problems. You’ll walk away with practical strategies to recognise pseudoscience when it shows up, how to push back against misinformation, and guidance on keeping your own practice anchored in evidence-based thinking. So, settle in for an honest, wholehearted exploration of what it means to separate real science from empty promises in the ever-evolving world of health and fitness.

Dan discusses the historical background of neurodynamics - known more commonly as "nerve mobilizations" - as well as the scientific rationale for their inclusion in therapy programmes. He also talks about their effectiveness in improving flexibility.

Dan explains how the word "mobility" is defined in the scientific literature, and the pitfalls associated with using it to refer to range of motion.

In this exclusive interview, Dan speaks with Dr Sandro Freitas, one of the world's most prominent stretching and flexibility researchers, about the current state of the science and where it should go in the future. Dr Freitas was kind enough to provide visual aids during the conversation, which you can see on the YouTube version of the episode: https://youtu.be/Qv2q1bUkcx4

In this instalment, Dan discusses the subject of flexibility and genetics. Video version available at youtube.com/danvanzandt

In the third instalment in a mini-series called Components of Flexibility, Dan explains the biomechanical properties of tissue elasticity, energy, and hysteresis.

Philip Chubb is a movement and fitness coach who advocates for simple, no-nonsense training that builds self-efficacy in his clients while getting real results with the least necessary effort. You can find Philip on Instagram @the_mindful_mover

Donavan Barrett is a martial artist and flexibility coach who offers training advice and programs specifically for people looking to do the splits and powerful high kicks.