Jill Miller: Increase Flexibility & Relieve Pain with Breathwork & Myofascial Release
In a Nutshell
Jill Miller explains self-myofascial release (SMR) using soft tools like balls and rollers to improve range of motion, force output, proprioception, and pain relief by enhancing tissue glide, nitric oxide release, and parasympathetic activation—best done pre-workout to offset DOMS and avoid hard tools that trigger muscle bracing. Key techniques include decompression (e.g., lumbar hammock on lateral raphe), breathwork across diaphragms (respiratory, pelvic) to build rib elasticity and vagal tone, and Zone 1-2 breathing to counter sympathetic dominance causing fascial thickening. Benefits extend to diastasis recti management, hypermobility (4 B's: breath, bellies, brace, avoid bony junctions), and chronic issues like anxiety, jaw clenching, and low back pain via consistent, gentle palpation and mindset.
These notes were generated by AI and may contain inaccuracies.
Dr. Andy Galpin, professor, scientist, and executive director of the human performance center at Parker University, hosts the Perform podcast on enhancing human performance for sport, play, and life. Jill Miller is an expert in mobility, breath work, body work, and self-myofascial release. The episode covers definitions, optimal use, applications beyond pain relief and mobility, the role of fascia in regulating digestion, pain, physical performance, strength, and power output.
Andy first learned of Jill's work 15+ years ago from Kelly Starrett and Brian McKenzie. After negative experiences with yoga, he found Jill's approach to be the extraction of yoga's best parts for self-care, physical body recovery, and scientific experience. He has her books, products, attended her courses, and has three pages of notes.
Jill notes her yoga teaching was radical and heretical, bridging training, pain management, yoga, and self-care.
Traditional foam rolling viewed as compression: tight hamstring smashed to loosen it. Jill explains foam rolling as self-myofascial release using implements called stress transfer mediums: rolling sticks, foam rollers, balls, pokey tools with knobs. These mimic hands for self-treatment anytime, anywhere, without hiring help.
Implements compress tissue, induce local stretch (laying on ball/roller), or stroke along/across muscle line of pull, pivot for traction/pinching. These affect stretch receptors, body layers from skin to deep, and fascial tissues.
Jill wrote a narrative review of scientific research on self-myofascial release. Systematic reviews agree it improves range of motion quickly by dampening sympathetic feedback (e.g., sit-and-reach, shoulder overhead, spinal, jaw movements based on target).
Additional benefits:
- Improves force output and torque, allowing more lift over range, better muscle fiber recruitment.
- Dampens sympathetic overflow, increases parasympathetic reactivity for calming, reducing anxiety.
- Improves vascular flow: fascia releases nitric oxide for local vascular stretch.
Best use: offset delayed onset muscle soreness (DOMS). Yan Wilkkey (Germany) found DOMS inflammation not in muscle cells but in fascial fabric (epimysium) surrounding muscle. Fascia researchers joke: call it DOTS (delayed onset tissue soreness).
Rolling prior to workout reduces 48-hour inflammation. Can roll after or next day, but pre-workout is better to offset.
No breaking up scar tissue or realigning misaligned fibers. Fascia is alive, active, slow-changing tissue with many cell types and fibers. Fascia is the seam system: connects foot to face, cell to skin; suspends, interconnects structures; fibrous, fluid, self-filled; invested with 250 million nerve endings, making it a major sensory organ.
Fascia models:
- Strata/lasagna layers:
- Superficial fascia: continuous membrane under skin, subdivides fatty layer into superficial adipose tissue and deep adipose tissue; forms retinacular cutis (tent poles) for shape buoyancy.
- Loose fascia: sliding layers/interfaces (pinch forearm to feel glide).
- Deep fascia: mechanical model of movement (e.g., Tom Myers's Anatomy Trains continuities from foot to face); multiple layers glide on each other.
- Muscle interior:
- Endomysium: surrounds each muscle cell (like orange segment).
- Perimysium: wraps groups of fibers.
- Epimysium: wraps whole muscle bundles. All require glide for movement.
Tools stimulate fibroblasts (produce collagen/elastin), fasciacytes (produce hyaluron for slickness); create tension/stretch/pull, prompting fibroblast realignment/tearing.
Scar tissue: strong type 1 collagen for stabilization; surface friction can soften but not break (necessary permanent suture). Deep scars (e.g., Jill's total hip replacement 8 years ago: sawed greater trochanter, multi-layer breach) need movements/massage to restore glide and muscle length-tension relationships.
Favorite reason for self-myofascial release: enhance proprioception (knowing body position in space, next steps). Inverse relationship to pain perception.
Stimulates proprioceptive nerve endings: Ruffini, Pacini corpuscles, muscle spindles, Golgi. Improves sensory-motor awareness, dampens pain (analgesic effect), creates training window for better coordination/positions, optimizing body so pain has no place.
Pre-workout rolling allows training closer to pain ceiling (dampens pain signals, not deadening nerves). Poor coordination in pain leads to worse movement/accidents. Tools create physical state change and mental swipe.
Acute changes occur; long-term requires discipline, repetition, plus addressing root cause (exercise, nutrition, sleep). Foam rolling alone insufficient.
Example: Rolling tennis/baseball under foot 2 minutes improves toe-touch range of motion via fascial connections from foot to spine/head. Acute session lasts few minutes to hours; single session has no chronic effect without repetition.
So, one of the things that rolling on an
Rolling on an area like the foot likely does not cause morphological changes in fascial tissues, but it improves glide among tissues in 60 seconds to two minutes. Research indicates rolling adjusts discomfort to stretch by raising the pain pressure threshold through fluid changes and heat changes, inoculating against discomfort in forward bends for more movement. Neural changes include enhanced parasympathetic features, reducing muscle bracing in range of motion checks. Multiple factors contribute: fascia, neurology, and fluid mechanics. Expecting permanent structural change from two minutes of foam rolling on quads is unrealistic; effects last minutes to hours. Short-term rolling alone does not correct issues; additional strategies are needed for lasting change.
No research tracks effects beyond 30 minutes post-rolling into daily activities like classes over six hours, but anecdotally, clients see hours to days of improvement from deep, disciplined decompression, offloading compacted tissues, or 'fluffing' them.
Harder pressure or more pain does not equate to better results. 'Starratt pain cave' approach of enduring maximum pain is misguided. Soft tools are 500 times more effective.
Stress transfer mediums (self-myofascial release tools): foam rollers, balls of various hardness, roller sticks, pokey things. Hardness affects the body as a living organism.
Hard tools trigger sympathetic muscle bracing response, a protective mechanism against potential injury. Of over 200 papers on self-myofascial release, only one disclosed tool hardness.
Foam rollers are dense and hard like wood. Lacrosse balls match bowling ball hardness (same material substrate), with grippy rubber but no yield. Hard tools cause bracing and discomfort, fighting one's own tension.
Korean study on chronic neck pain in over-60-year-olds compared lacrosse ball (hard) vs. soft inflated ball. Hard ball group showed trapezius EMG thickening (bracing), preventing depth. Soft ball group gained neck range of motion and reduced pain as the tool penetrated without resistance.
Soft is supreme for working with the nervous system, avoiding sympathetic stress. Research by Leonid Bloom (cerebral palsy specialist) and Mark Driscoll showed softer tools reach furthest into substrates via indentation hardness tests.
Rolling pain signals protective response or inflammation/poor movement; use it as information, not to 'beat it out.' Gluey tissue from overuse increases hyaluron viscosity. Pain spots indicate burnout risk; address informedly.
Same logic applies to massages: Swedish feels good; deep tissue risks bracing. Aim for comfortable discomfort (tolerable, breathable, no jaw clenching, frozen eyes, hand gripping, or sympathetic overflow/dissociation). Stay present for conscious healing, as in Body by Breath.
Foam rolling while checking phone aids fibroblasts/fluids mechanically but misses sensory awareness for optimal remodeling. Subtle/gross sensations from neurons enhance control.
Fascia moves in every direction/vector. Compression helps, but offloading/tractioning opposite is key.
Cupping creates gapping from bone to skin, relieving overcompression or adhesions. Pin, spin, mobilize (from Kelly Starrett): Grip tool (soft ball preferred) into tissue, twist/wrangle to tolerable pinch (vortex stretch), then move tool/body (right/left/back/forth) for shear (horizontal stretch). Release yields perfusion, warmth, local range improvement (e.g., dynamic breaths post-rib cage).
Cupping stretches skin, superficial fascia, retinacular cutis, deep fascia, possibly periosteum, teasing deep nerve endings/blood vessels novelly against gravity's compression.
Example: Tractioning dog by scruff (upper trapezius/dowager's hump) feels amazing; replicate with two balls for offloading.
During pandemic stress (homeschooling 5-year-old kindergartener, 3-year-old preschooler on Zoom, pivoting company, writing book), Jill had panic attacks. Discovered lateral raphe in thoracolumbar aponeurosis (layered epimysial fascia: lats tendon, external/internal obliques, transversus abdominis, erector spinae; envelops psoas, quadratus lumborum).
Lateral raphe: seams where layers meet, above pelvic bones to 12th rib.
Used Gorgeous balls (soft, grippy, inflated rubber like human hand). Placed on sides of low back (lateral raphe), sacrum/rib cage/head on floor. Breathed diaphragmatically for minutes as internal massage into thoracolumbar aponeurosis, experiencing pleasure.
Jill describes feeling pleasure from her sacrum to the crown of her head, with her entire spine lengthening while balls broadened her from side to side. After removing the balls, she felt she had grown an inch as her discs reperfused. Her anteriorly tilted pelvis was no longer passively hanging in anterior tilt. Andy experienced the same: his lumbar spine felt neutral, not hypertonic in extension. This addressed back tension from emotional stress of business, family, and feeling trapped, leading to emotional release.
This method painlessly addresses back pain and spinal arthritis without aggressive friction or rollout. Progressive positioning anchors thoracolumbar aponeurosis layers. Breath creates a squeegee swipe balloon action, inducing progressive stretch from bone to ligament to disc to fascial layer to muscle for better glide along the axis. Micro-movements within this position address nuanced issues. Decompression also affects visceral organs anteriorly, processing stress and posture, contributing to overall emotional release.
The term self-myofascial release is problematic, as is foam rolling. Science critiques it, but people feel psychological or spiritual release—heaviness or strain evaporates after lying on gushy air-filled balls and breathing without movement or pain. Breath is the movement. Literature on myofascial release has doubled in the last couple of years; science is catching up, so clinicians provide essential coaching.
Myofascial release doesn't only mean releasing myofascia. Better terms: myofascial treatment, massage, or manipulation, as release can't be guaranteed, but manipulation can. Many rollouts regulate stress and help pain and syndromes.
Called lumbar hammock (in Body by Breath: spinal decompression via the lateral raft). A researcher/professor in Wisconsin works with firefighters. One firefighter struggled with certification stress test (running stairs with heavy pack) but succeeded with energy to spare and no pain after a month of gentle, non-painful rollouts including this technique. Now forming firefighter cohort.
Same researcher works with Parkinson's patients: immediate postural improvements, tremors stop or diminish greatly. Autonomic nervous system benefits beyond tissue effects. Low/no cost substitutes: rolled yoga mats with grip (e.g., towel covered with jar openers like canoe bottle openers). Grip creates horizontal shear forces from skin to bone via traction and offload, not just compression.
Sample videos on Instagram, YouTube (9-minute version available; links in show notes).
Two primary diaphragms: respiratory diaphragm (horizontal, misshapen parachute partitioning abdominal organs from heart/lungs, acting as pump for viscera below and lungs/heart above, keeping them separate—without it, small intestine would exit nose). In decompression, cue to breathe south of rib cage into balls senses diaphragm excursion downward on inhale, relaxation on passive recoil exhale. Notice right vs. left differences (right higher, left lower; innervated separately by right/left phrenic nerves).
Diaphragm lacks muscle spindles, no proprioceptive awareness (unlike bicep). Felt in spasm (hiccups). Make visible via pressure (Coreis ball/therapy balls) and novel breathing to build interoceptive awareness.
Key: below diaphragm, sewn into fascial fabric with transversus abdominis. Rigid transversus (from overtraining, sucking in stomach) stiffens fascia, inhibiting diaphragm descent. Diaphragm press creates intra-abdominal pressure: organs bob down, pelvic floor stretches, abdomen stretches circumferentially forward, thoracolumbar aponeurosis distends horizontally. Low back pain (most prevalent worldwide) blocks this.
Use Coreis ball on transversus in sideline position first to attenuate pain response (gut smash triggers bracing/escape). Brain signals pain if compromised. Use mindset: self-suggest "I'm a student of my breath" or "my breath is welcome here" to welcome discomfort. Visceral pain real (small/large intestine, bladder).
Diaphragm works if alive, but issues: poor intercostals rhythm, stiffness between transversus/diaphragm, poor rib excursion, overbreathing via accessory muscles.
Breathing zones in Body by Breath:
- Zone 1: Gut expansion, diaphragm descending (relaxing).
- Zone 2: Intercostals + diaphragm (rib upward/downward rotation; 12 rib pairs/side).
- Zone 3: Face/neck/shoulder (sympathetic, gasping; seen in asthmatics/panic; also orgasm; not long-term healthy).
Signs of Zone 3 dominance: chronic neck/shoulder/jaw pain, headaches, hand pain, bruxism, sleep apnea (mouth/jaw/tongue behavior). Worsened by tech (hand-to-eye positioning).
Test via touch responses. Address Zone 3 via Zone 2 first: sideline/front-lying on Coreis balls on ribs/sternum as elastic biofeedback for intrathoracic pressure changes, anchoring healthy patterns (mostly Zone 1/2; Zone 3 for emergencies). Awareness prevents unconscious armoring (shoulders to ears, head forward, upper back rounded).
Pressure provides biofeedback for breathing zone. Builds self-awareness, flips stress switches, fills parasympathetic cup (e.g., during LA fires).
Sample (side-lying, both sides, videos on Instagram): block/pillow under head, soft gushy ball (Coreis) under ribs.
- Dynamic Zone 2 breath (broaden ribs like Popeye).
- Hold breath, stiffen/activate rib muscles.
- Exhale passively, let go.
- Build: after exhale, void lungs further (blow out four more candles).
Contract-relax plays baroreceptors in aorta for vagal rush. Changes in two minutes.
Blow out six more candles on the birthday cake till you get to such an absence of intrathoracic pressure that you have a spontaneous inhalation. There are lots of different tricks to work on creating this elasticity of the rib cage. Doing both ends—this dynamic inhale hold and then the exhale—forcing the air out using the intercostals, diaphragm, and transversus abdominis builds costal recoil. Avoid pinching your face or scrunching your eyebrows into zone 3 reactivity. This helps the costovertebral joints, improving thoracic spine mobility, especially transverse plane rotation. Do it once a day to start; morning or night both work, but for headaches and jaw pain at night, do it in the morning and at night pre-bed.
These exercises turn on your off switch, accelerating a parasympathetic dominant state and pushing off sympathetic overflow. Students doing parasympathetic exercises, including for face, neck, and head—not just a Cordeus ball in the rib cage—address the temporomandibular joint, temporalis muscle, and other muscles in the superficial fascial layer of the face. These facial muscles share source nuclei in the brainstem with the vagus nerve, stimulating it via palpation combined with breathing. Dosing up on parasympathetic stimuli prior to bed reduces unconscious clenching overnight, leading to less soreness in facial muscles. Do a little in the morning to free up range of motion and change pain before working out, and at night before bed. Get into good positions before training and before sleep.
We have sympathetic (fight or flight) and parasympathetic (rest and digest) branches. Most people assume if they're not at high heart rate or mentally stressed, sympathetic is off, but there's a difference between not being on and actively turning on the off switch. Strategies to be more effective at turning on the off switch involve building parasympathetic tolerance. Society and beings are sympathetic dominant; without investing in recovery, it's hard to produce, stay creative, think clearly, make decisions, or even pick curtain colors.
Constant sympathetic arousal with repeated adrenaline and cortisol shots causes adaptive changes in fascial tissues. Fibroblasts exposed to adrenaline convert after 24 hours due to TGF-beta into myofibroblasts—contractile cells with myosin in the fascial network, prevalent in thickened, non-gliding fascia. First found in thoracolumbar aponeurosis in people with low back pain. It doesn't happen immediately; over a month, tissues tension by 1 cm. Exposing yourself to stresses is important for adaptation, but chronic stress response changes connective tissue, leading to thickening and pain. Parasympathetic practices offset this, refilling your cup as internal medicine against inevitable stress.
All of me is welcome here. I embody my body.
Perspective: Top-down mindset to create conscious change or awareness. Be present to receive body information; emotions often arise in off switch state, which can be unpleasant but important for communication, growth, relational safety. Parasympathetic state is quiet, requiring deep listening and sensing.
Place: Safe, relatively quiet space, ideally darker side for relaxation response, away from bright lights or noise like clanging kettlebells. Set up environments for letting guard down, even in gyms or refugee camps.
Position: Recline to remove postural stress on heart and diaphragm, reducing sympathetic tone. Gentle slope position (pelvis slightly higher than heart and head) enhances vagal dominant state via baroreceptor reflex. Getting on the ground feels good; go with gravity.
Pace of Breath: Slow deep breathing for 5 minutes daily is the sweet spot per HHP Foundation systematic review on breath research for anxiety reduction (Tanya Bentley and Brian McKenzie co-founders). Mix fast and slow, but must include slow; fast alone doesn't alter stress response. Extended exhales or inhales work; use zone 1-2 muscles, not zone 3.
Palpation: Self-myofascial release dampens sympathetic outflow, enhances proprioceptive and interoceptive feedback, promoting relaxation response.
Simplest 5-minute practice: Recline with pelvis on Cordeus ball for traction/palpation, slow breathing in safe place, affirm "my breath is home" or "I embody my body".
Pelvic floor is the bottom diaphragm with horizontal crisscrossing fibers at the bottom of the bony pelvic funnel, similar to respiratory diaphragm. It mirrors thoracic diaphragm movement: diaphragm descent stretches pelvic floor via pressure into viscera and circumferential core distension. If pelvis is rotated out of diaphragm's pressure wave (e.g., banana back, rib thrust, anterior pelvic tilt), pressure goes forward into rectus sheath and linea alba, breaching it into diastasis recti. Stacking diaphragms optimizes; misalignment (rib flaring or pelvic tilt) causes dysfunction manifesting in many ways, like chronic hip pain shifting pelvis off center.
Fascial work and self-myofascial release in specific joints restore elasticity and muscle function compromised by position, scar tissue, injury, or remodeling collagen to new normal. Centering joints provides more movement options.
Katie Bowman wrote Diastasis Recti; it's a whole-body issue from anterior pressures, not just overstretched abdomen. Can occur from carrying triplets/twins or overtraining tension. Diastasis recti breaches connective tissue (linea alba) linking right/left anterior abdomen (around rectus abdominis, obliques, transversus abdominis) from sternum to pubic symphysis—key for core force production, spine/pelvis stabilization, breathing. 100% of women get it during pregnancy due to elastin/relaxin from fetus; post-birth, it takes months, never fully reseals—gap fills with superficial fascia, adipose, collagen lacking pre-birth strength/integrity. Causes poor force transfer, proprioceptive deficit, back/pelvic pain, incontinence, prolapse. People with lax connective tissue more prone; 66% close almost fully after a year, third linger as outliers.
Fibroblasts repair slowly; need time and consistency for collagen remodeling. Address hip, pelvis, low back, shoulder, rib cage to optimize rib cage-pelvis position. Use exercises co-occurring with breathing rhythms—breathing muscles line the core/birthday suit—to build correct tension over time. Can't rush it.
These breathing exercises should be done during pregnancy. Body by Breath has a chapter on diastasis recti and self-massage applications. Warning: Do not put a ball in the center of the overstretched area. Create movements that move core muscles from the sides to the middle using vectors of pressure that avoid scrubbing the midline. Combine with breathing exercises and tension-based exercises to rebuild tension on axis. This is personal—each woman has different stretch levels; some have more gapping on one side due to baby position, stretching external abdominal oblique and transversus abdominis. Measure with fingers and get checked by a pelvic floor PT for diagnosis. These are fascia-based injuries.
Pelvic floor physical therapists are ideal for diastasis recti. For those dealing with it now, pregnant, or planning pregnancy, start there. Get the book by Katie on diastasis for pre-, during-, and post-pregnancy exercises.
Pregnancy involves hypermobility; treat pregnant bodies like hypermobile clients. Rolling differs for hypermobile vs. non-hypermobile bodies. 20% of people have some degree of hypermobility (Jessica Eckle's research)—not necessarily pathological like Ehlers-Danlos or Marfan syndrome.
Framework for rolling hypermobile bodies, including pregnant people. Libby Hinsley wrote Yoga for Bendy Bodies (Jill wrote the foreword).
- Breath: Use conscious breathing while rolling for interoceptive feedback and calmer nervous system. Hypermobile bodies tend toward higher anxiety; brain region changes (Jessica Eckles, Hugo Critchley research).
- Bellies: Stay toward muscle bellies, not joints. Bony junctions are dislocation risks due to less muscle mass, joint capsules, and ligaments. Rolling muscle bellies restores length-tension relationships, decouples hypertonic trigger points for better agonist-antagonist strength.
- Brace: Use contract-relax techniques. Not always rolling to bone or full depth—brace for superficial tissues, loose fascia transitions to deep fascia. For hypermobile spinal segments, maintain tension while rolling for parasympathetic benefits without losing support. Stay superficial to avoid depth/dislocation.
- Avoid Bony Junctions: (Third B, tied to bellies).
Superficial rolling (skin, fatty layer, superficial fascia) provides parasympathetic and proprioceptive benefits—majority of sensory neurons in superficial fascia. Improves positioning sense for those who blow past joint junctions, risking stability. Heightens proprioception with contract-relax. When in doubt, don't roll it out—risk injury. Encourage rolling for highly anxious hypermobile people or those with digestive challenges.
Hypermobility affects collagen-based fascia, organs, eyes—linked to breathing problems, autoimmune challenges, mast cell activation, IBS. Rolling tamps sympathetic overflow, promotes calm/reflection.
Love all movement, including static stretching and isometrics. For muscle-bound or scar tissue-bound people (e.g., overtrained big biceps), combine rolling and static stretching. Rolling creates temporary elasticity, improves joint positions.
Roll biceps with stacking (balls like a vice on either side). Or lean against wall with block between rib cage and arm, balls on either side, pancake bicep, move elbow/shoulder for vectors—increases elasticity quickly. Follow with static stretching for long-held fascial traction. Work antagonists (e.g., triceps) and forearm (myofascial expansion into periosteal sheath between radius/ulna). Clients see generalized range of motion improvements after days of rolling/static stretching, but need daily guidance.
Benefits beyond pain/soreness relief:
- Improves movement coordination and proprioception.
- Improves range of motion/mobility quickly (e.g., rolling spine changes shoulders; around knee helps hip/knee).
- Improves torque/force production post-rolling (enhances acute force; research on strength/torque).
- Decreases pain.
- Reduces arterial stiffness, improves vascular/endothelial function.
- Decreases delayed onset muscle soreness.
- Induces physiological relaxation/parasympathetic activation (chill pill without a pill).
- Reduces lymphedema, decreases local tissue inflammation.
Harvard research (Bo Reio): Very soft tools (pencil eraser pressure) with gentle oscillations healed destroyed anterior tibialis in mice.
Germany research (Dr. Robert Schleip, Fascia Research Congress/Society originator): Rolling helps major depressive disorder in mental health institution—improves affect, memory, cognition via surveys and tissue mechanics.
Canada research: Improves interoception and sustained attention.
Evidence from rollers, sticks, tools (not vibrating)—cheap home care. Bias toward balls/softballs.
Field evolving; clinical experience adds context to science. Valuable for outcomes regardless of exact mechanisms (tissue repair, nervous system, connective tissue).
Check Jill's videos, free content, courses, seminars, products in show notes. Subscribe on YouTube, Spotify, Apple; leave 5-star reviews. Support sponsors, share episodes. Content questions in YouTube comments. Follow @DrAndyGalpin on Instagram/X. Newsletter at performpodcast.com (free; e.g., fitness, VO2 max, muscle/strength)—no email sharing.
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