RECONSIDER... The Ultimate Guide to ISA (Infrasternal Angle) | Episode #60
Release Date: 04/06/2025
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info_outlineFree articles and courses about ISA from Bill Hartman at http://uhp.network
Try Bill’s training program based on YOUR ISA at http://www.reconu.co
Episode Summary:
In this episode, Chris and Bill explore the concept of the Infra-Sternal Angle (ISA), discussing its definition, historical context, and implications for movement and performance. They delve into how the ISA relates to structural archetypes, specifically the narrow and wide types, and how these archetypes influence breathing, movement, and athletic performance.
#isa #physicaltherapy #stretching #mobility #biomechanics
Chapters & Timestamps:
00:00 – Introduction to the Infra-Sternal Angle
Chris and Bill introduce the ISA, clarifying its origins and common misconceptions about its attribution.
00:41 – Historical Context and Early Exposure
Bill discusses his first exposure to the ISA, referencing Shirley Sarman's work and older anatomical studies.
04:26 – Defining the Infra-Sternal Angle
Chris and Bill define the ISA as the angle formed by the lower rib cage below the sternum, emphasizing its importance in structural analysis.
08:27 – Structural Archetypes: Narrow and Wide
They discuss how the ISA relates to two primary structural archetypes: the narrow and the wide, each with distinct movement biases.
09:02 – Movement and Breathing Biases
Bill explains how narrow archetypes are biased towards inhalation and external rotation, while wide archetypes are biased towards exhalation and internal rotation.
15:00 – Performance Implications
Chris and Bill explore how these biases affect athletic performance, with narrow archetypes excelling in high-velocity turning and wide archetypes in force production.
23:05 – Wide Structural Archetype Capabilities
They discuss the wide archetype's ability to generate force and support weight due to a broader base of support.
25:29 – Force vs. Velocity
Chris and Bill clarify that force and velocity are opposites, with narrow archetypes favoring velocity and wide archetypes favoring force.
27:02 – Conclusion
They summarize the ISA's role in understanding structural archetypes and their implications for movement and performance.
Key Takeaways:
Understanding Structural Archetypes: Recognize the narrow and wide archetypes and their implications for movement.
Breathing and Movement Biases: Each archetype has specific breathing and movement biases that influence performance.
Performance Optimization: Tailor training strategies to the individual's structural archetype for optimal performance.
Force vs. Velocity: Understand that force and velocity are distinct, with different archetypes excelling in each area.
Books Mentioned in the Episode:
Diagnosis and Treatment of Movement Impairment Syndromes: https://amzn.to/44b57oM
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Podcast audio:
https://open.spotify.com/show/7cJM6v5S38RLroac6BQjrd?si=eca3b211dafc4202
https://podcasts.apple.com/us/podcast/reconsider-with-bill-hartman/id1662268221
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