Step 2
The Clinical Problem
A client walks in complaining of deep calf pain, tightness behind the ankle, or aching that extends into the arch of the foot. They may notice discomfort when walking, especially when pushing off the ground, and in some cases the bottom of the foot becomes painful or fatigued.
Stretching the superficial calf muscles often provides little relief because the tension originates deeper within the leg.
The underlying cause frequently lies in the deep posterior calf muscles, which include:
• Tibialis posterior
• Flexor digitorum longus
• Flexor hallucis longus
These muscles lie beneath the larger calf muscles and run down the back of the lower leg. Their tendons travel behind the medial ankle and wrap underneath the foot before attaching to the toes and arch.
Because of this unique pathway, these muscles play a critical role in supporting the arch of the foot and controlling the toes during walking.
When these muscles enter spasm, tension travels along their tendons as they pass beneath the ankle and into the foot. This can produce pain not only in the calf but also along the medial ankle and plantar surface of the foot.
Clients may experience:
• deep aching in the calf
• pain behind the inner ankle
• tension along the arch of the foot
• fatigue or discomfort when walking
Since these muscles help maintain the arch, chronic spasm can also contribute to collapse of the arch and instability of the foot.
Releasing the deep posterior calf muscles relieves tension along the tendon pathways, restores normal movement of the ankle and toes, and often eliminates the deep calf and plantar foot pain associated with this pattern.
Step 3
Why This Happens
The deep calf muscles flex the toes, flex the arch, stabilize the foot and control the arch.
When they enter spasm:
👉 they pull continuously along the medial side of the ankle through the plantar aspect of the foot
👉 they greatly increase tension through the plantar fascia and can be the cause of plantar fasciitis
👉 they restrict dorsi-flexing the ankle and toes
Primary Mechanism
👉 tension locks from the deep calf into the arch, plantar foot and toes
This creates:
-
pain on the medial side of the heel where all three tendons can be palpated
-
tightening of the plantar fascia
-
sharp pain when stepping down
Result
👉 plantar fasciitis can be caused by these muscles
👉 pain in the bottom of the toes and foot, the medial ankle and the calf
Step 4
Anatomy
Primary Structures
Students should identify the origin, insertion, innervation and actions of:
Tibialis Posterior
Origin
-
Posterior tibia
-
Posterior fibula
-
Interosseous membrane
Insertion
-
Navicular tuberosity
-
Cuneiforms
-
Cuboid
-
Bases of the 2nd–4th metatarsals
Action
-
Plantarflexion
-
Inversion
-
Dynamic support of the medial longitudinal arch
Innervation
-
Tibial nerve (L4–L5)
Flexor Digitorum Longus
Origin
Posterior tibia
Insertion
Distal phalanges of toes 2–5
Action
-
Flexes toes
-
Assists plantarflexion
-
Supports the longitudinal arch
Innervation
Tibial nerve (S2–S3)
Flexor Hallucis Longus
Origin
Posterior fibula
Insertion
Distal phalanx of the great toe
Action
-
Flexes the hallux
-
Powerful push-off during gait
-
Assists plantarflexion
-
Supports the arch
Innervation
Tibial nerve (S2–S3)
Important Landmarks
Students should locate
-
Tibia
-
Fibula
-
Medial malleolus
-
Sustentaculum tali
-
Navicular
-
Talus
-
Calcaneus
-
Cuneiforms
-
Cuboid
Structures Passing Through the Tarsal Tunnel
Remember the order
Tibialis posterior tendon
Flexor Digitorum Longus tendon
Posterior tibial Artery
Posterior tibial Veins
Tibial Nerve
Flexor Hallucis Longus tendon
Step 5
Palpation
Palpation and Muscle Identification
One of the most valuable clinical skills you will develop is the ability to identify individual muscles beneath the skin through careful palpation.
The goal of this exercise is not to release the muscles yet. Instead, your objective is to learn to recognize each muscle by following its fibers from origin to insertion while locating areas of increased tension.
As your palpation skills improve, you will begin to recognize that each muscle has a unique direction, texture, depth, and firmness.
These characteristics allow an experienced therapist to distinguish one muscle from another even when several muscles overlap.
Cross-Fiber Palpation
Throughout this modality, use cross-fiber palpation.
Instead of sliding along the direction of the muscle fibers, gently move your fingertips back and forth across the fibers.
This creates a subtle side-to-side motion that allows your fingers to detect differences in tissue density.
As you move across the fibers, search for:
• unusually tight bands
• localized knots or dense areas
• regions that are significantly tighter than the surrounding tissue
Within these tight bands you will often discover one or more release points.
These are the locations you will later return to during treatment.
Do not attempt to release them yet.
At this stage, your objective is simply to learn to find them consistently.
Palpating Through the Superficial Calf
The muscles treated in this modality lie deep to the gastrocnemius and soleus.
For this reason, successful palpation depends upon the superficial muscles being relaxed.
Position the client's foot and knee so the gastrocnemius and soleus remain as relaxed as possible.
Once these muscles soften, you will often be surprised by how easily the deeper muscles can be felt through them.
Rather than pushing forcefully into the leg, use gentle pressure while allowing your fingers to sink gradually through the superficial tissues.
Once contact with the deeper muscles is established, continue using cross-fiber palpation while tracing each muscle individually.
With practice, you will be able to distinguish the borders of each muscle beneath the gastrocnemius and soleus.
Tibialis Posterior
Locate the tibialis posterior deep within the central portion of the posterior calf.
Using cross-fiber palpation, slowly trace the muscle from its broad origin on the posterior tibia, fibula, and interosseous membrane toward its tendon as it travels behind the medial malleolus and inserts primarily onto the navicular.
Notice how the muscle contributes to inversion and dynamic support of the medial longitudinal arch.
Search carefully for the tightest bands and identify any release points.
Flexor Digitorum Longus
The flexor digitorum longus originates on the medial side of the posterior tibia.
Follow the muscle downward using cross-fiber palpation as it travels behind the medial malleolus before continuing toward toes two through five.
One helpful anatomical feature to remember is that although the muscle begins medially, its tendon ultimately distributes toward the more lateral toes.
Remember this relationship:
Starts on the medial side of the calf — finishes toward the lateral toes.
This crossing pattern makes the muscle much easier to remember during future palpation.
Flexor Hallucis Longus
The flexor hallucis longus begins on the lateral side of the posterior fibula.
Use cross-fiber palpation to identify the muscle before tracing it downward as it passes behind the medial malleolus toward the great toe.
Unlike the flexor digitorum longus, this muscle begins laterally but finishes at the most medial toe—the hallux.
Remember this relationship:
Starts on the lateral side of the calf — finishes on the medial side of the foot.
Students often remember these two muscles by recognizing that they essentially exchange sides as they descend into the foot.
A Helpful Memory Trick
The two long flexors appear to cross one another as they travel toward the foot.
Flexor Hallucis Longus
-
Starts lateral
-
Ends medial
Flexor Digitorum Longus
-
Starts medial
-
Ends lateral
If you remember where each tendon finishes, you can quickly recall where each muscle begins.
Your Goal
By the end of this exercise you should be able to:
☑ Relax the superficial calf muscles
☑ Palpate through the gastrocnemius and soleus
☑ Identify the tibialis posterior
☑ Identify the flexor digitorum longus
☑ Identify the flexor hallucis longus
☑ Trace each muscle from origin toward insertion
☑ Locate the tightest fibers within each muscle
☑ Identify the most likely release points for treatment
I would add one additional sentence that reflects something you've emphasized throughout the Releasology curriculum:
The ability to accurately identify individual muscles through palpation is one of the defining skills of an effective Releasology practitioner. Every successful release begins with precise muscle identification.
That sentence reinforces one of the core ideas you've been building across all 40 modalities: anatomy isn't just something to memorize—it's something students learn to feel with their hands.
Step 6
Nerves, Circulation & Functional Connections
The deep posterior compartment of the lower leg is more than a group of muscles. It is a narrow anatomical corridor through which important nerves and blood vessels travel toward the ankle and foot.
This is one reason restriction in the deep calf can create symptoms that seem to occur somewhere else.
The Tibial Nerve
The tibial nerve travels through the posterior leg and descends with the structures of the deep posterior compartment before passing behind the medial ankle through the tarsal tunnel.
From there, its branches continue into the plantar surface of the foot.
This relationship is especially important in Releasology.
When the muscles and surrounding tissues of the deep posterior calf become excessively tight, the pathway followed by the tibial nerve may also be affected. A client may therefore describe discomfort not only in the calf, but farther down the chain:
-
Pain or unusual sensations around the medial ankle
-
Burning, aching, tingling, or sensitivity in the plantar foot
-
Heel discomfort
-
Arch pain
-
Foot fatigue
-
Stiffness while walking
-
Symptoms that resemble plantar fasciitis or tarsal tunnel irritation
When symptoms appear distally, remember to look upstream.
The painful location is not necessarily the location where the problem began.
The Deep Flexors
Two important muscles in this compartment continue all the way into the foot.
Flexor digitorum longus travels behind the medial ankle and ultimately reaches the lateral four toes.
Flexor hallucis longus follows a similar pathway and continues toward the great toe.
Tension within these long muscular chains can therefore influence the mechanics of the toes, arch, ankle, and calf simultaneously.
This is an important Releasology principle:
Follow the muscular chain rather than treating only the location where the client feels pain.
Tibialis Posterior and the Arch
Tibialis posterior is one of the body's important dynamic supporters of the medial longitudinal arch.
A dysfunctional or chronically restricted tibialis posterior can influence the position of the foot during standing and walking.
When the foot is not functioning normally, the effects can continue upward through the kinetic chain toward the knee, hip, and pelvis.
Likewise, restrictions higher in the leg can influence what happens below.
The body works as a connected system.
Neurovascular Awareness
The posterior tibial artery and accompanying veins also travel through this region.
For this reason, the deep posterior calf is an area that should be approached with anatomical awareness rather than indiscriminate pressure.
The purpose of Releasology is not to press as deeply as possible.
The purpose is to find the specific muscular restriction that needs to release.
Depth is only useful when it is accurate.
Use your knowledge of anatomy, palpation, and tissue response to distinguish muscular structures from areas where direct pressure is inappropriate.
Think Distally
Before beginning the treatment, ask the client what they feel in the:
-
Calf
-
Achilles region
-
Medial ankle
-
Heel
-
Arch
-
Plantar surface of the foot
-
Great toe and other toes
Then compare those sensations after treatment.
Sometimes the most interesting change occurs somewhere you never directly touched.
That is one of the lessons of this modality.
Treat the deep posterior calf—but observe the entire pathway into the foot.
Step 8
Memorization Worksheet
Now it is time to convert what you have learned into a working understanding of the
Deep Posterior Calf modality.
Complete the worksheet provided for this modality.
As you work through it, make sure you can identify and explain:
-
Tibialis posterior
-
Flexor digitorum longus
-
Flexor hallucis longus
-
The tibial nerve
-
The relationship between the deep posterior calf and medial ankle
-
The continuation of these structures toward the arch and plantar foot
-
The location and meaning of a Release Point
-
Cross-Fiber Palpation
-
Traveling Cross-Fiber Palpation
-
The difference between Yang pressure and Yin withdrawal
-
Why symptoms in the foot may lead you to examine structures farther up the leg
Do not treat the worksheet as something you simply need to finish.
Use it to create a mental map.
When your hands are on a client, you should be able to visualize what lies beneath them.
Upload Your Completed Worksheet
When your worksheet is complete, photograph or scan it clearly and upload it below.
Make sure:
-
Your entire worksheet is visible.
-
Your answers can be read clearly.
-
Your name is included where requested.
-
You have completed every required portion before submitting it.
Once your worksheet has been successfully uploaded, continue to the practice section.
Step 9
Practice
Guided Practice
Before recording a complete treatment, practice the Deep Posterior Calf modality on a partner.
This stage is about developing your hands.
Do not rush it.
Your goal is to become comfortable identifying the anatomy, locating meaningful restrictions, controlling your pressure, and recognizing changes in the tissue.
Practice Checklist
With your practice partner lying prone:
☐ Observe both legs and feet before beginning.
☐ Ask about existing calf, ankle, heel, arch, or plantar-foot discomfort.
☐ Position yourself with safe Releasology body mechanics.
☐ Begin with hand-tuition and notice where your hands initially want to explore.
☐ Use Cross-Fiber Palpation to distinguish tighter fibers from the surrounding tissue.
☐ Use Traveling Cross-Fiber Palpation to follow those fibers along the calf.
☐ Identify at least one clear Release Point.
☐ Approach the deep posterior compartment gradually and anatomically.
☐ Explore the deep posterior calf structures without using indiscriminate pressure.
☐ Apply the Yang phase gradually.
☐ Generate pressure from the ground through your legs rather than dropping body weight into the client.
☐ Maintain your path of force through your body and into your contact.
☐ Observe the client's response throughout the release.
☐ Slowly reduce pressure during the Yin phase rather than abruptly removing your hand.
☐ Repalpate the area after the release.
☐ Notice whether the Release Point has changed.
☐ Continue along the muscular chain using Traveling Cross-Fiber Palpation.
☐ Use brief connecting strokes where appropriate.
☐ Complete one leg before treating the opposite leg.
☐ Compare the two sides.
☐ Have your partner stand and walk after treatment.
☐ Ask what changed in the calf, ankle, heel, arch, or foot.
What You Are Learning
Do not judge your practice only by how much pressure you can apply.
That is not the skill.
The skill is being able to find something specific.
Before the release, you should be able to identify a distinct restriction.
Afterward, palpate it again.
Did it soften?
Did the surrounding fibers change?
Did movement change?
Did a symptom somewhere farther down the chain change?
This before-and-after comparison is one of the fastest ways to educate your hands.
When you can confidently locate and release the structures demonstrated in this modality, you are ready to record your treatment.
Step 10
Treatment Demonstration
Record Your Treatment
You are now ready to demonstrate the Deep Posterior Calf modality.
Perform the treatment on a practice client while recording your work.
Your video is an opportunity to demonstrate that you understand not only where to press, but how to think and work as a Releasology practitioner.
Your Video Should Demonstrate
Show enough of your positioning, hands, and the client's lower leg for your technique to be evaluated.
During the treatment, demonstrate:
-
Appropriate client positioning
-
Observation of the leg and foot
-
Safe practitioner body mechanics
-
Cross-Fiber Palpation
-
Traveling Cross-Fiber Palpation
-
Identification of Release Points
-
Anatomically appropriate access to the deep posterior calf
-
Controlled Yang pressure
-
Slow Yin withdrawal
-
Repalpation following a release
-
Progression along the muscular chain
-
Treatment of both sides when appropriate
-
Reassessment after treatment
You do not need to perform for the camera.
Work naturally.
We want to see that you can locate the tissue, recognize restrictions, release them safely, and respond to what you feel beneath your hands.
Before Treatment
At the beginning of the recording, briefly ask your client what they currently feel.
If they have a relevant complaint, establish its approximate intensity and location.
Examples include:
-
Deep calf tightness
-
Medial ankle discomfort
-
Heel pain
-
Arch discomfort
-
Plantar-foot pain
-
Foot stiffness
-
Difficulty or discomfort while walking
If possible, have the client stand or walk before beginning so there is something meaningful to compare afterward.
During Treatment
Communicate with your client.
Check their comfort as you enter deeper tissue.
Remember:
More pressure is not necessarily better treatment.
A precise Release Point treated with controlled pressure is more valuable than forcing your way through an entire muscle.
Let your palpation determine where you work.
After Treatment
When the treatment is complete, reassess.
Have your client stand, move the ankle, walk, or repeat whichever movement made the original problem easiest to notice.
Ask what feels different.
Do not tell the client what they are supposed to feel.
Let them discover and describe the changes themselves.
Upload Your Video
Review your recording before uploading it.
Make sure the important portions of the treatment are visible and that the video successfully demonstrates your technique.
Then upload your treatment video below.
Once your treatment video has been submitted, continue to Section 11.
Step 11
Testimionial Video
Record Your Client's Experience
The final practical step is to document what your client experienced.
After completing the Deep Posterior Calf treatment and allowing the client to stand, walk, and reassess their body, record a short testimonial.
Whenever possible, record this immediately after the treatment while the before-and-after experience is still fresh.
Let the Client Speak
Do not give your client a script.
Do not tell them what changed.
Instead, ask simple questions and let them describe their own experience.
You might ask:
What were you feeling before the treatment?
Where did you feel it?
How did it affect standing, walking, or movement?
What do you notice now?
Does the calf feel different?
Does the ankle or foot feel different?
How does walking feel compared with before the session?
If the client's original complaint was in the heel, arch, or plantar foot, ask specifically about that area.
The most useful testimonial is an authentic description of what the client actually experienced.
Capture the Before-and-After Story
A strong testimonial establishes three things:
Before: What was the problem?
Treatment: What area did you work on?
After: What changed?
The client does not need to understand the anatomy.
That is your job.
Their job is simply to tell us what they felt.
Why This Matters
Every treatment teaches you something.
When you document the client's response, you begin building a personal clinical record of the patterns you encounter and the results you produce.
Over time, these experiences help turn technique into clinical confidence.
They also teach an important Releasology lesson:
The place where a person feels the problem is not always the place where the restriction is located.
A client may arrive talking about their foot.
Your hands may lead you to their calf.
The change after treatment helps you understand the connection.
Upload Your Testimonial
Record the testimonial with your phone or camera positioned so the client can be clearly seen and heard.
Keep it natural.
When the recording is complete, upload the testimonial video below.
You have now completed the practical work for Modality 32.
Continue to Section 12 to test your understanding of the Deep Posterior Calf modality.
Step 12
Quiz and Modality Completion
the deep posterior calf muscles can be the true cause of plantar fasciitis (their tendons wrap behind the medial ankle into the plantar fascia), and that stretching the superficial calf fails because the tension is deeper. I built the quiz around those module-specific ideas (plantar fasciitis link, medial-ankle tendon path, cross-fiber palpation, why stretching fails, dorsiflexion restriction), with the answers already spread across positions:
1. Which three muscles make up the deep posterior calf complex?
A. Gastrocnemius, soleus, and plantaris
B. Peroneus longus, brevis, and tertius
C. Tibialis posterior, flexor digitorum longus, and flexor hallucis longus
D. Quadratus plantae, lumbricals, and interossei
2. A client is told they have plantar fasciitis. Why can this deep calf complex be the true underlying cause?
A. It has no connection to the foot
B. It only affects the knee joint
C. Its tendons pass behind the medial ankle and drive tension into the plantar fascia
D. It compresses the sciatic nerve
3. Why does stretching the superficial calf usually fail to relieve this pain?
A. The tension originates deeper, in the deep posterior calf muscles
B. Stretching always worsens pain
C. The pain is entirely psychological
D. The superficial calf doesn't attach to the ankle
4. Where are all three tendons best palpated, and with what technique?
A. On the top of the foot, using tapping
B. At the knee, using traction
C. Behind the lateral ankle, using compression
D. Behind the medial ankle / medial heel, using cross-fiber palpation
5. Besides arch and plantar pain, chronic spasm here restricts which movement?
A. Shoulder abduction
B. Dorsiflexion of the ankle and toes
C. Neck rotation
D. Hip extension