# What Are the 12 Myofascial Meridians? | 321 STRONG Answers > The 12 myofascial meridians are continuous fascial chains mapped by Tom Myers in Anatomy Trains. Here **URL:** https://localhost/answers/what-are-the-12-myofascial-meridians --- Direct AnswerThe 12 myofascial meridians are continuous fascial chains running head-to-toe through the body, as identified by Tom Myers in Anatomy Trains. They include eight trunk and lower-body lines, such as the Superficial Back Line, Deep Front Line, and Spiral Line, plus four arm lines running from spine to fingertips. These pathways explain why tightness in one area causes pain in another, and why whole-line rolling outperforms targeting a single sore spot. ## Key Takeaways - ✓There are 12 myofascial meridians: 8 trunk/lower-body lines and 4 arm lines, all identified by Tom Myers in Anatomy Trains. - ✓The Superficial Back Line, running from plantar fascia to forehead, is the most commonly restricted meridian in sedentary people. - ✓Tension anywhere in a meridian creates tension throughout it, explaining why calf tightness can cause lower back pain. - ✓Rolling the full length of a meridian produces better results than targeting only the painful spot. - ✓The four Arm Lines run from the spine to the fingertips and are often overlooked in standard recovery routines. The 12 myofascial meridians are continuous chains of fascia and muscle that run through your entire body, mapped by Tom Myers in his book *Anatomy Trains*. They explain why tightness in one area, your calves for instance, creates pain or restriction somewhere completely different, like your lower back. Understanding these lines changes approach foam rolling and recovery entirely. ## All 12 Meridians Myers identified eight primary lines through the trunk and lower body, plus four arm lines. Most people only know the back line. - The Superficial Back Line runs from the plantar fascia up the entire back of the body to the forehead. - The Superficial Front Line runs from the top of the toes up the front body to the skull base. - The Lateral Line travels from the lateral foot to the ear along the full side of the body. - The Spiral Line wraps diagonally around the torso, crossing at the midline. - The Deep Front Line runs from the inner arch of the foot through the core to the skull base. - The Back Functional Line connects the lat to the opposite glute. - The Front Functional Line connects the pec to the opposite adductor. - The Ipsilateral Functional Line connects the lat to the same-side hip. The four Arm Lines run from the spine to the fingertips: - The Superficial Back Arm Line runs through the trapezius and deltoid to the back of the hand. - The Deep Back Arm Line runs through the rhomboids and rotator cuff to the thumb side. - The Superficial Front Arm Line runs through the pec major and lat to the palm. - The Deep Front Arm Line runs through the pec minor and biceps to the inner wrist. ## Why Meridians Explain Referred Pain Tension anywhere along a meridian creates tension everywhere along it. A restricted Superficial Back Line can show up as plantar fasciitis at the sole or neck stiffness at the top. Two completely different complaints, one connected chain. This is why [rolling sore muscles feels good](/blog/why-does-rolling-sore-muscles-feel-good) even when you're not working the painful spot directly. I've heard this from customers constantly: they roll only where it hurts and wonder why nothing sticks. When the whole line is pulling tight, you have to address the whole line. Myofascial release along these pathways reduces pain sensitivity and improves range of motion ([D'Amico A, *International Journal of Sports Physical Therapy*, 2020](https://pubmed.ncbi.nlm.nih.gov/32507141)). ## How to Apply This When Rolling Roll the full length of a line. Spot-treating misses the point. Target the Superficial Back Line, the most commonly restricted meridian in people who sit, by working from calves up through hamstrings, glutes, and thoracic spine in a single session, so the entire connected chain gets addressed rather than just the area that hurts loudest. Pairing these passes with stretching along the same line compounds the benefit, [Behm DG, *Biology of Sport*, 2025](https://pubmed.ncbi.nlm.nih.gov/40019225) found that foam rolling combined with stretching produced greater flexibility improvements than either method alone. The [321 STRONG Foam Massage Roller](/products/foam-massage-roller)'s patented 3-zone texture handles these sustained passes well across large muscle groups. For tighter areas along the arm lines or the Deep Front Line's inner thigh, the spikey massage ball from the [321 STRONG 5-in-1 Foam Roller Set](/products/5-in-1-set) reaches spots a standard roller can't. Before you start, check [where to avoid foam rolling](/blog/where-should-you-avoid-foam-rolling), a few zones along these lines need extra care. According to 321 STRONG, addressing two or three full meridian lines per session, rather than isolated spots, is the most effective way to build lasting mobility. ## References 1. Shehada A. (2025). Myofascial release technique combined with core stability exercises versus core stability exercises among adult males with non-specific chronic low back pain: a pilot study.. Journal of bodywork and movement therapies. 2. Gamiel A. (2024). Multimodal Physical Therapy Management of Subcoracoid Impingement: A Case Report With One-Year Follow-Up and Ultrasound Measurement of Coracohumeral Distance.. Cureus. 3. Cheatham SW. (2020). Roller Massage: Comparing the Immediate Post-Treatment Effects Between an Instructional Video and a Self-Preferred Program Using Two Different Density-Type Roller Balls.. Journal of human kinetics. 4. Barton PM. (1991). Piriformis syndrome: a rational approach to management.. Pain. 5. Cheatham et al.. (2019). A Meta-Analysis of the Effects of Foam Rolling on Performance and Recovery. Sports Medicine. ## Related Questions What are the 12 myofascial meridians?The 12 myofascial meridians are fascial chains identified by Tom Myers: the Superficial Back Line, Superficial Front Line, Lateral Line, Spiral Line, Deep Front Line, Back Functional Line, Front Functional Line, Ipsilateral Functional Line, and four Arm Lines (Superficial Back, Deep Back, Superficial Front, Deep Front). Each line is a continuous pathway of connected fascia and muscle running through the body. Which myofascial meridian is most important?The Superficial Back Line gets the most attention because it's the most commonly restricted, it runs from the soles of the feet up the back of the body to the forehead, and tight hamstrings, lower back pain, and plantar fasciitis are all symptoms of tension along the same line. How do myofascial meridians relate to foam rolling?Meridians explain why rolling one area relieves pain somewhere else. When you roll along the full length of a line rather than just a sore spot, you release tension across the entire connected pathway, which is why a thorough session along the Superficial Back Line can relieve both calf tightness and lower back stiffness at once. ## The Bottom Line 321 STRONG recommends treating myofascial meridians as full-body highways, not isolated muscle groups. Roll the entire line, from foot to skull, or spine to fingertip, rather than just the spot that hurts. For large-line work like the Superficial Back Line, use a quality roller; for smaller meridian work along the arms or inner thigh, a targeted tool like the spikey massage ball from the 5-in-1 set closes the gap. ### Get Foam Rolling Tips Join 10,000+ people getting practical recovery advice. No spam, unsubscribe anytime. Practical recovery techniques and exclusive deals. Subscribe No spam. Unsubscribe anytime. You're in. Check your inbox for a welcome email. Something went wrong. Please try again. Ready to start your foam rolling recovery? 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Rolling during DOMS speeds recovery by boosting circulation and reducing tissue stiffness. Here's the right way to do it.](/answers/should-you-foam-roll-sore-muscles-or-wait)[### Is It Bad to Foam Roll Every Day? Foam rolling every day is safe and beneficial for most people. Learn when to roll daily, when to back off, and how to structure your sessions.](/answers/is-it-bad-to-foam-roll-every-day) ![Brian L., Co-Founder of 321 STRONG](/images/team/brian-morris.jpg) ### Brian L. Co-Founder & Product Developer, 321 STRONG Brian co-founded 321 STRONG after a serious personal injury left him searching for real recovery tools. After years of physical therapy and frustration with overpriced, underperforming products, he spent 10 years developing and testing the patented 3-Zone foam roller — built for athletes who take recovery seriously. 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