30 Hamstring Complex
This modality teaches the release of the hamstring group, which stabilizes the pelvis and knee.
Step 1
Understanding the Problem
A client—often a dancer or athlete—arrives with:tight hamstrings
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pain during forward bending
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difficulty straightening the leg
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recurring strain or pulling sensation
They may say:
👉 “I stretch all the time, but it never improves.”
Key Insight
The hamstrings are not just tight.
👉 They are often in chronic spasm, frequently influenced by the sciatic nerve
Step 2
The Clinical Problem
A client walks in complaining of pain in the back of the thigh, tightness when bending forward, or a sharp aching sensation near the ischial tuberosity, commonly known as the sitting bone.
They may report difficulty touching their toes, tying their shoes, or bending forward to pick something up. In many cases they also notice that the knee does not fully straighten, creating stiffness or discomfort when walking.
Stretching often provides only temporary relief because the underlying muscle spasm has not been released.
Before addressing the hamstrings directly, it is important to recognize that the piriformis must be released first if it is in spasm. When the piriformis is in spasm, it directly compresses the sciatic nerve and is the cause of true sciatica. The sciatic nerve is the nerve supply for the hamstrings, so they instantly spasm when the sciatic nerve is pinched by the piriformis. The piriformis also alters the position of the sacrum and pelvis, placing additional stress on the lumbar intervertebral discs by altering the position of the surface they directly rest on.
The hamstring group consists of three muscles:
• Biceps femoris
• Semitendinosus
• Semimembranosus
These muscles share a common origin at the ischial tuberosity. When this tendon becomes chronically tight, the pain at the sitting bone can be quite severe. In many cases this origin release point, points near the middle, and points close to the tendon insertions must be released directly before the hamstrings will let go. They are large muscles and need more firm and sustained pressure than most muscles do in order to release.
The biceps femoris requires special attention because it has two heads. The long head shares the common tendon at the ischium, but the short head originates along the middle of the posterior femur. If this second origin remains tight, releasing only the ischial attachment will not fully resolve the spasm.
For this reason both the ischial origin and the femoral origin of the short head must be addressed to restore normal function.
When the hamstrings enter spasm they resist the motions they normally perform: hip extension and knee extension. These muscles flex the knee and extend the hip, so bending forward at the hip or bending the knee will both be restricted when these muscles are in spasm.
Once the hamstring origins and key fibers are released, tension through the back of the thigh resolves quickly, allowing the hip to bend forward normally and the knee to extend freely again.
Step 3
Why This Happens
The hamstrings share a close anatomical relationship with the sciatic nerve.
When hamstrings are in spasm:
👉 they compress and restrict the nerve
When the nerve is restricted:
👉 it prevents the hamstrings from fully relaxing
Cycle
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muscle spasm → nerve restriction
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nerve restriction → continued muscle tension
👉 a self-perpetuating loop
Step 4
Anatomy
Biceps Femoris
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Origin: ischial tuberosity (long head) and middle of femur bone (short head)
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Insertion: fibular head
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Movement: knee flexion and hip extension
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Innervation: sciatic nerve
Semitendinosus
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Origin: ischial tuberosity
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Insertion: medial tibia
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Movement: knee flexion and hip extension
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Innervation: sciatic nerve
Semimembranosus
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Origin: ischial tuberosity
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Insertion: medial tibia
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Movement: knee flexion and hip extension
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Innervation: sciatic nerve
Sciatic Nerve
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runs deep along posterior thigh
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passes between hamstring structures
👉 highly influenced by hamstring tone
System Insight
👉 hamstrings are both:
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movers
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stabilizers
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and protectors of the sciatic nerve
Step 5
Palpation & Tissue Assessment
Position:client prone
Hamstring Assessment
Palpate:
from ischial tuberosity → down the thigh
Use:👉 cross-fiber palpation
In Spasm - dense cord-like resistant
👉 feels like tight cables
Sciatic Sensitivity
Feel for:
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radiating sensation
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deep nerve-like response
Step 6
Neurological Consequences
The Hamstrings can go into spasm all on their own because of fatigue. Direct release will be required to release them from spasm. The sciatic nerve passes deep under the hamstrings. When they spasm, they pinch the sciatic nerve. When the piriformis is in spasm, they can spasm as a secondary response. In this case, the piriformis must be released first.
When the sciatic nerve is restricted:
👉 the hamstrings cannot be fully release, the knee will not fully extend and it becomes painful to forward bend at the hip joint.
This may lead to:
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persistent pain
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reduced mobility
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increased injury risk
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atrophy of the hamstrings
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numbness
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tingling
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weakness
Release will restore normal function and immediately reverse all of these symptoms.
Step 7
Technique Demonstration
As you watch:
Focus on:
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working along the full length of the muscle
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gradual depth
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Yang → Yin transition
Observe:👉 how the tissue softens progressively
Step 8
Worksheet Exercise
Download the PDF worksheet below.
Using a red drawing tool on your phone or tablet
Draw:
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all three hamstrings
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sciatic nerve pathway
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Fill in labels:
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origin
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insertion
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innervation
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movement
Save the image to your device.
Click the white "UPLOAD WORKSHEET" button, below.
If it looks like the correct file has uploaded, click the black submit button, and this upload will be joined with the rest of your uploads for review.
This exercise is a great way to memorize, and/or review muscular anatomy.
Step 9
Practice Assignment
Clinical Skill Development
Position:
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client prone
Technique Flow
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begin at ischial origin
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move distally along muscle
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apply slow pressure
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achieve release with each hamstring muscle - don't forget the short-head of the biceps femoris
Important
👉 use firm pressure, but only on the muscles
👉 avoid space between the muscles→ that's where the nerves are
Step 10
Treatment Recording
Record using a tripod.
Your Video Must Show:
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full hamstring sequence
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proper hand placement
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body mechanics
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controlled pressure
Upload Instructions
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review your video
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confirm clarity
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upload:
👉 use Upload Button
👉 select file
👉 after confirming the correct file is uploaded, click the black submit button
Step 11
Testimionial Recording
After completing your treatment, your next step is to document the outcome from the client’s perspective.
This is an essential part of your training. It allows you to confirm that the release was not only performed correctly, but that it created a meaningful change in function, comfort, and movement.🎯
What to Capture in the Testimonial
Have your client describe their experience clearly and honestly. Have them give a 0 to 10 rating for overall pain, or restriction, level before and after treatment. Guide them to include:
What they were feeling before the session (tightness, pulling behind the leg, low back tension, restricted movement)
What they felt during the treatment (specific points of pressure, areas that felt dense or “bound,” and moments of release)
What they feel after the session (increased flexibility, reduced tension, improved posture, ease of movement)🧠
What You Are Looking For
In this modality, the hamstrings often create a constant pulling force on the ischium, which affects the pelvis and lower back. A successful release will often result in:
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A noticeable reduction in posterior chain tension
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Improved ability to bend forward or extend the leg
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A feeling of “lightness” or freedom in the hips and lower back
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More balanced posture when standing or walking
Encourage your client to describe these changes in their own words.
🎥 Recording Instructions
Record a short video (30–60 seconds)
The client should be clearly visible and audible
Keep the background quiet and well-lit
Have them speak naturally — no script needed✅
Before Submitting
Make sure:
The client’s face and voice are clear
The improvement is described (not just “it feels good”)
The video is steady (use a tripod if possible)📤
Upload Your Testimonial
Once recorded, upload your client testimonial using the upload button below.
This submission helps validate your work and allows us to assess your ability to create real, measurable results through proper release technique.
Step 12
Knowledge Check & Module Completion
Complete the following quiz to confirm your understanding of the Scalenus Anterior Release technique and the key concepts in this module.
To pass:👉 80% or higher
You Must Understand:
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hamstring anatomy
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sciatic nerve relationship
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spasm vs stretch limitation
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treatment sequencing
Key Insight (Refined)👉 tight hamstrings are often a neurological restriction, not just a muscular one
Athletic Insight👉 flexibility is not gained by forcing stretch👉 it is restored by releasing spasm
System Insight👉 nerve + muscle = function
1. Which muscles make up the hamstring complex?
A. Quadriceps
B. Biceps femoris, semitendinosus, semimembranosus
C. Gluteals
D. Calves
2. What happens when the hamstrings are in chronic spasm?
A. Improved flexibility
B. Increased strength
C. Posterior chain restriction and altered pelvic mechanics
D. Better posture
3. How do hamstrings affect the pelvis?
A. They do not
B. They affect breathing
C. They stabilize the spine only
D. They pull on the ischium and alter pelvic positioning when tight
4. How are the hamstrings affected by the sciatic nerve?
A. They are innervated by it, so they spasm when the piriformis is in spasm and compress it directly when they are in spasm
B. They pull on the ischium and alter pelvic positioning when tight
C. They stabilize the spine only
D. They affect breathing
5. What is the result of proper release?
A. Weakness
B. Improved mobility and balanced pelvic mechanics
C. Increased stiffness
D. Skin tightening