Structural integration for baseball
Spiral line, throwing chain, hip rotation
A throwing arm that needs longer to recover between starts. Hips that no longer rotate evenly. A lower back that picks up the slack the spiral line is not providing. Same fascial system underneath all of it. That is the work.
The off-season window
Pro: November through early February. College: late June through early January, working around fall ball in September and October. That is when your body has the bandwidth for structural change instead of maintenance. Twelve sessions, eight to twelve weeks, then you head into spring on a reorganized structure.
What is actually restricting you
- Spiral line asymmetry. Throwing and swinging are one-sided sports. The dominant-side spiral line shortens. T-spine rotation caps on one side. Velocity and bat speed both pay.
- Hip internal rotation deficit. The lead and trail hips lose rotation in opposite directions. The lumbar spine becomes the relief valve. The back ache after every start or every doubleheader is downstream of this.
- Deep front arm line. The chain from pec minor through biceps to thumb tightens from thousands of throws. The shoulder takes load that should be distributed through the chain.
The 12-session ATSI series
Twelve sessions, three phases, eight to twelve weeks. Full program detail on the 12-Session Series page. Off-season framing on the Off-Season Structural Reset.
Where this fits in your recovery stack
- Massage releases tension locally.
- PT and ATC rehab specific injury.
- Chiropractic adjusts joints.
- ATSI reorganizes the fascial system so your body needs the others less often.
Credentials
- ATSI-certified, 750+ hours of training
- Anatomy Trains teacher-in-training under Tom Myers
- Santa Cruz studio. Mobile sessions throughout the Bay Area, including team facilities.
- Working with pro and collegiate athletes since 2015
Book a free 30-minute movement assessment
I will watch you move, ask the questions that matter, and tell you honestly whether the 12-session series makes sense for what you are after. No pitch.
Questions, answered
I am a pitcher. My throwing shoulder is dialed in. Will this mess with it?
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No. The work is precise and conservative around the throwing chain. The goal is to free the rest of the body, especially the hips and the non-dominant side, so the shoulder stops being asked to do work upstream segments should be doing. Most pitchers I work with report velocity holds or improves and the recovery between starts shortens.
I am a position player. What is the main pattern?
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Rotational asymmetry. Years of one-sided swings, throws, and slides build a dominant-side spiral line that is shorter and tighter than the other. Hip rotation goes asymmetric. The lower back picks up the difference. Reorganizing the spiral line restores the symmetry.
When is the best time in the calendar?
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Pro off-season is November through February. College off-season is July through January. Twelve sessions over eight to twelve weeks, then you head into spring on a reorganized structure.
Can I do throwing program work during the series?
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Yes. Most baseball athletes throw through the work. We time deeper sessions away from your highest-intensity throwing days and bullpen sessions.
Is there research backing fascia work for rotational athletes?
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The fascial framework is increasingly cited in sports medicine literature, and the May 2026 NYT Magazine feature on the interstitium brought it firmly into mainstream anatomy. Read more on <a href="/interstitium-fascia-athletes">why this matters for athletes</a>.