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Completed

NCT Number: NCT06534931

Effects of a Thoracic Manipulation on Hip Adductor, Extensor, and Latissimus Dorsi Force in Those With Adductor Weakness

The goal of this trial was to determine if a mid-thoracic high velocity low amplitude spinal manipulation improves force output in those with unilateral hip adductor weakness. The main aims were to determine if the intervention:

Improved hip adductor force and muscle activation immediately and 48 h post manipulation compared to a control group.

Improved gluteus maximus and latissimus dorsi force and muscle activation immediately and 48 h post manipulation compared to a control group.

Strength and muscle activation of the hip adductors, hip extensors (gluteus maximus), and shoulder extensors (latissimus dorsi) were measured prior to, immediate after, and 48 hours after receiving a high velocity low amplitude manipulation to the thoracic spine. The manipulation was performed by a licensed chiropractor.

A control group received a validated sham manipulation to the thoracic spine. Participants were blinded to group assignment.

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Key information

Conditions

Muscle Weakness Muscular Diseases Musculoskeletal Diseases Nervous System Diseases Neurologic Manifestations Neuromuscular Manifestations Pathologic Processes Pathological Conditions, Signs and Symptoms Signs and Symptoms

Age range

18 year–65 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

University of New England

Portland, Maine, 04103, United States

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Unilateral hip adductor weakness, as assessed by manual muscle testing
  • Pain free hip motion
  • No contraindications to high velocity thoracic spine manipulation including:

Any known active cancer/ Metastatic Bone Cancer Osteoporosis or other metabolic bone disorders Signs of spinal cord compression Nerve root compression with increasing neurologic deficit Signs of Vertebrobasilar insufficiency/ cervical artery abnormalities Bleeding Diatheses Angina pectoris

Exclusion criteria

  • Current pain in the adductor muscle group
  • Past history of hip surgery
  • Past history of hip fracture
  • History of spine or rib fractures
  • Psoas muscle group (hip flexor) weakness as determined by manual muscle testing
  • Received a chiropractic manipulation in past week

Treatment and study plan

High velocity low amplitude thoracic spine manipulation

Procedure

Participants were supine on a treatment table. The chiropractor determined levels of apparent spinal dysfunction by means of static palpation. Participants were then asked to curl forward and bring their knees to their chest as the chiropractor placed a fist just inferior to the targeted level, anywhere between the T4 - T10 vertebrae. The participant was instructed to inhale and then exhale, at which point the chiropractor lowered the participant's torso back to the table and delivered a thrust using his body into his fist.

Sham

Procedure

A previously validated physiologically inert manual procedure to the thoracic spine

Primary outcomes

  1. Hip adductor force (weak limb)

    Time frame: Pre intervention, immediatly post intervention, 48 hours post intervention

    Isometric force produced by the hip adductors in the weaker limb. Measured with a force transducer and reported in Newtons.

  2. Hip adductor muscle activity (weak limb)

    Time frame: Pre intervention, immediatly post intervention

    Mean muscle activity during isometric contraction. Measured with surface electrode and reported as a percentage of maximum activation.

Secondary outcomes

  1. Hip extension force (strong limb)

    Time frame: Pre intervention, immediatly post intervention, 48 hours post intervention

    Isometric force produced by the hip extensors in the strong limb. Measured with a force transducer and reported in Newtons.

  2. Gluteus maximus muscle activity (strong limb)

    Time frame: Pre intervention, immediatly post intervention

    Mean muscle activity during isometric contraction. Measured with surface electrode and reported as a percentage of maximum activation.

  3. Hip extension force (weak limb)

    Time frame: Pre intervention, immediatly post intervention, 48 hours post intervention

    Isometric force produced by the hip extensors in the weak limb. Measured with a force transducer and reported in Newtons.

  4. Gluteus maximus muscle activity (weak limb)

    Time frame: Pre intervention, immediatly post intervention

    Mean muscle activity during isometric contraction. Measured with surface electrode and reported as a percentage of maximum activation.

  5. Shoulder extension force (weak limb)

    Time frame: Pre intervention, immediatly post intervention, 48 hours post intervention

    Isometric force produced by the shoulder extensors in the weak limb. Measured with a force transducer and reported in Newtons.

  6. Latissimus dorsi muscle activity (weak limb)

    Time frame: Pre intervention, immediatly post intervention

    Mean muscle activity during isometric contraction. Measured with surface electrode and reported as a percentage of maximum activation.

  7. Shoulder extension force (strong limb)

    Time frame: Pre intervention, immediatly post intervention, 48 hours post intervention

    Isometric force produced by the shoulder extensors in the strong limb. Measured with a force transducer and reported in Newtons.

  8. Latissimus dorsi muscle activity (strong limb)

    Time frame: Pre intervention, immediatly post intervention

    Mean muscle activity during isometric contraction. Measured with surface electrode and reported as a percentage of maximum activation.

  9. Hip adductor muscle activity (strong limb)

    Time frame: Pre intervention, immediatly post intervention

    Mean muscle activity during isometric contraction. Measured with a force transducer and reported in Newtons.

  10. Hip adductor force (strong limb)

    Time frame: Pre intervention, immediatly post intervention, 48 hours post intervention

    Isometric force produced by the hip adductors in the strong limb. Measured with a force transducer and reported in Newtons.

Sponsors and collaborators

Lead sponsor

University of New England

Other

Collaborators

  • Raymond Chiropractic

Registry information

Official study title

Effects of a High Velocity Low Amplitude Mid-Thoracic Spinal Segment Manipulation on the Force Output of the Hip Adductors and Extensors and the Latissimus Dorsi in Healthy Individuals With Unilateral Hip Adductor Weakness

Important dates

Study start
2021
Primary completion
2023
Study completion
2023
First posted
Aug 2, 2024
Registry last updated
Aug 2, 2024

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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