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The deep longitudinal subsystem

Deep Longitudinal Subsystem (DLS)

Deep longitudinal subsystem (DLS) is comprised of the fibularis (peroneal) muscles, biceps femoris, sacrotuberous ligament, and erector spinae, and may include the piriformis, adductor magnus, and rhomboids.

Function
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Course Description: Deep Longitudinal Subsystem

This course describes the deep longitudinal subsystem (DLS), a concept originally proposed by Vleeming et al. (1). The deep longitudinal subsystem may also be referred to as the deep longitudinal sling, deep posterior subsystem, deep posterior sling, deep posterior myofascial synergy, and is similar to the concepts of body slings, muscle synergies, myofascial lines, myofascial trains, anatomy trains, superficial back line, and spiral line.

The Deep Longitudinal Subsystem (DLS) is comprised of:

Function (Brief)

  • Concentric Function: Assists with propulsion from heel strike to push-off during gait, assists with lifting from a forward bent position, and is the prime mover of lumbar hyper-extension.
  • Isometric Function: Contributes to stabilization of the tibiofibular joints, hip joints, sacroiliac joints, and all segments of the spine.
  • Eccentric Function: Decelerates leg swing and impact during heel strike, eccentrically decelerates forward bending, and eccentrically decelerates ankle inversion.

Common Maladaptive Behavior

  • Over-active

Practical Application

The concepts and techniques described in this course may be particularly beneficial for neuromuscular re-education, coordination, motor pattern integration, whole-body strength, functional strength, and sports performance. Sports medicine professionals (personal trainers, fitness instructors, physical therapists, massage therapists, chiropractors, occupational therapists, athletic trainers, etc.) should consider adding these exercises to their repertoire to improve the outcomes of their integrated exercise programs, sports performance programs, and therapeutic (rehabilitation) interventions.

Pre-approved Credits for:

Pre-approved for Continuing Education Credits for:

This Course Includes:

  • AI Tutor
  • Video Lectures
  • Study Guide
  • Text of Material
  • Learning Activities
  • Practice Exam
  • Pre-approved Final Exam

FAdditional Subsystem Courses

Deep Longitudinal Subsystems (DLS): Fibularis (peroneal) muscles, biceps femoris, sacrotuberous ligament, and erector spinae.
Caption: Deep Longitudinal Subsystems (DLS): Fibularis (peroneal) muscles, biceps femoris, sacrotuberous ligament, and erector spinae.

Course Study Guide: Deep Longitudinal Subsystem

Introduction: Deep Longitudinal Subsystem
2 Sub Sections

Research Corner
8 Sub Sections

Summary of Research Findings

More on Function

Compensation and Models of Postural Dysfunction
3 Sub Sections

Videos
4 Sub Sections

Sample Program: Knees Bow Out

Bibliography

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    • Sacrotuberous Ligament
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    • Erector Spinae
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    • Biceps Femoris, Adductors, Piriformis and Deep Rotators
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    • Splenius Capitis and Cervicis
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    • Gait
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    • Stabilization of the Sacroiliac Joint
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    • Secondary System
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