It is time! Now that you have the “physics” of the net and the “biology” of the fascia, we can finally look at the actual “tracks” laid out in the body.

Thomas Myers identified these seven primary lines. Think of these as the seven main cables that keep your biotensegrity structure from collapsing into a heap.

1. The Superficial Back Line (SBL)

The Route: From the bottom of your toes, up the calves, hamstrings, and spine, over the top of your skull to your eyebrows.

• The Job: It keeps you standing upright (extension). It acts like a massive “stay-cable” on a mast.
• The Lesson: This is why rolling a ball under your foot can sometimes magically make it easier to touch your toes.

2. The Superficial Front Line (SFL)

The Route: From the tops of the toes, up the shins, over the kneecaps, up the thighs and abdominal wall, to the throat and the side of the skull.

• The Job: It balances the Back Line. It also handles “forward” movement (flexion) and protects your internal organs.
• The Lesson: When this line is tight, it acts like that “short wetsuit,” pulling your head and chest down.

3. The Lateral Lines (LL)

The Route: One on each side, running from the mid-foot, up the outside of the ankle and leg, weaving in a “criss-cross” pattern up the torso to the ear.

• The Job: These are your “stabilizers.” They stop you from toppling over sideways and coordinate the relationship between your upper and lower body.
• The Lesson: If you “hitch” your hip when you walk, your Lateral Line is usually the culprit.

4. The Spiral Line (SL)

The Route: This one is complex—it loops around the body like a “double helix” or a candy cane stripe, connecting one side of the skull to the opposite shoulder, then wrapping around the ribs to the opposite hip and down to the foot.

• The Job: It manages rotation. It keeps your body from twisting into a knot and helps maintain knee tracking when you walk.
• The Lesson: Spiral line issues often show up as “twists” in the torso or knees that cave inward.

5. The Arm Lines

The Route: There are actually four (Deep Front, Superficial Front, Deep Back, Superficial Back). They run from the torso (chest/back) all the way to the fingertips.

• The Job: They connect our “manipulators” (hands) to our “core.” They allow us to push, pull, and lift.
• The Lesson: Elbow pain (like tennis elbow) is often a “victim” of a “culprit” located in the shoulder or upper back along these lines.

6. The Functional Lines

The Route: These are diagonal lines that connect the opposite shoulder to the opposite hip (front and back).

• The Job: These only really “turn on” during athletic movement—like throwing a ball, swinging a golf club, or sprinting. They provide extra power by bridging the upper and lower body.
• The Lesson: These are the “power cables” of the athlete.

7. The Deep Front Line (DFL)

The Route: This is the body’s inner core. It starts deep in the arch of the foot, travels up the inside of the leg, through the pelvic floor, the psoas (hip flexors), the diaphragm, and up to the jaw and tongue.

• The Job: This is your “inner pillar.” It manages breathing, heart rhythm, and deep structural stability.
• The Lesson: This is the “emotional” line we discussed. It’s the most difficult to feel but the most important for overall health.

How to approach learning these

Don’t try to memorize all seven at once. It’s much better to “feel” them in your own body one by one.

The Superficial Back Line is usually the best place to start because it’s the easiest to feel and has the most dramatic “instant” effects when you work on it.