What Are the Effects of Lower Limb Dysmetria on Gluteus Medius and Erector Spinae Musculature? (s-EMG)

Changes in Activity of Erector Spinae and Gluteus Medius Mus-cles With the Presence of Simulated Lower Limb Dismetry

Gluteus Medius (GM) has also been implicated in the development of LBP. GM is one of the main pelvic, where he actively participates in control of motion in the frontal and transverse plane, and hip , improving stability to the lumbopelvic-hip complex.

The aim of present study was to investigate whether modifying lower limb length with a different foot insoles of 0.5, 1 and 1.5 cm in a normal population has an effect on ES and GM activity and as a consequence in LBP. As a secondary objective, in turn, to evaluate whether ES and GM activity has an effect on jumping ability as assessed through CMJ.

Study Overview

• Status: Completed
• Conditions: Muscular Disorders, Atrophic
• Intervention / Treatment: Other: To evaluate the response of an orthopedic insole; Other: evaluate activation of musculature

Detailed Description

Background: Lengt leg discrepancy (LLD), regardless of its origin, is a very common pathology that can contribute to low back pain. Various authors point out its relationship with the lack of acti-vation of both the gluteus medius (GM) and the ipsilateral erector spinae (ES). The purpose of this study was to identify the activation of Es and GM with different simulated LLD, correlating said activation with the LBP. In turn, to evaluate whether ES and GM activity has an effect on jumping ability as assessed through CMJ. (2) Method: a sample of healthy subjects was selected to whom an artificial LLD was incorporated through a 0.5, 1 and 1.5 cm insole, measuring with EMGs in these 3 moments while walking and performing a counter movement jump (CMJ). The measurement was carried out in random order, in terms of insole height, using a Latin Square. Muscle activation patterns were recorded for 30 seconds at each of the insole heights while walking at 5.7 km/h and compared with the maximum voluntary contraction (MVC), both on the ipsilateral and contra-lateral sides. These muscles were then measured under the same circumstances during the de-velopment of the CMJ. (3)

• Study Type: Interventional
• Enrollment (Actual): 34
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Spain
  • Madrid
    • Villanueva De La Cañada, Madrid, Spain
      • Juan Hernández Lougedo

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult
• Accepts Healthy Volunteers: Yes

Description

Inclusion Criteria:

-

Exclusion Criteria:

• The volunteers had no problems in range of motion of joints of the lower limbs
• pelvic obliquity due to a functional leg length discrepancy.
• obesity with body mass index (BMI) 35 > kg/m²

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Prevention
• Allocation: Randomized
• Interventional Model: Crossover Assignment
• Masking: Single

Number of Arms

3

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Plantilla 0,5 cm; A template with the dimensions indicated is introduced to the user and he/she walks for 1 minute.	Other: To evaluate the response of an orthopedic insole; To evaluate the response of an orthopedic insole of different heights on gait.; Other: evaluate activation of musculature; To evaluate the response caused by an orthopedic insole of different heights on the indicated musculature.
Experimental: Plantilla 1 cm; A template with the dimensions indicated is introduced to the user and he/she walks for 1 minute.	Other: To evaluate the response of an orthopedic insole; To evaluate the response of an orthopedic insole of different heights on gait.; Other: evaluate activation of musculature; To evaluate the response caused by an orthopedic insole of different heights on the indicated musculature.
Experimental: Plantilla 1,5 cm; A template with the dimensions indicated is introduced to the user and he/she walks for 1 minute.	Other: To evaluate the response of an orthopedic insole; To evaluate the response of an orthopedic insole of different heights on gait.; Other: evaluate activation of musculature; To evaluate the response caused by an orthopedic insole of different heights on the indicated musculature.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Height CMJ	CMJ jump flight height	1 week
Height DJ LEFT	Flying height in drop jump left leg	1 week
Height DJ RIGHT	Flying height in drop jump right leg	1 week
Gluteus medius (mv)	Gluteus medius activation (mv)	1 week
Erector Spinae (mv)	Erector Spinae activation (mv)	1 week

Collaborators and Investigators

• Sponsor: Camilo Jose Cela University
• Investigators: Study Director: Eduardo Cimadevilla, PT, Camilo Jose Cela University

Study record dates

Study Major Dates

• Study Start (Actual): March 20, 2023
• Primary Completion (Actual): June 3, 2023
• Study Completion (Actual): September 8, 2023

Study Registration Dates

• First Submitted: December 4, 2023
• First Submitted That Met QC Criteria: January 11, 2024
• First Posted (Actual): January 23, 2024

Study Record Updates

• Last Update Posted (Actual): January 23, 2024
• Last Update Submitted That Met QC Criteria: January 11, 2024
• Last Verified: January 1, 2024

More Information

Terms related to this study

• Keywords: Low Back Pain; electromyography; Leg Length Inequality; lower limb length
• Additional Relevant MeSH Terms: Nervous System Diseases; Musculoskeletal Diseases; Neuromuscular Diseases; Muscular Diseases; Muscular Disorders, Atrophic
• Other Study ID Numbers: CamiloJcU-Fisio

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No