Effects of a 60-min Repeated Trunk Flexion Protocol on Trunk Neuromuscular Properties.

University of Primorska16 enrolled

Overview

An interventional study on the effects of repeated trunk flexion exposure on trunk neuromuscular properties.

An interventional study will include 16 healthy young adults. All participants will complete a 60-min protocol of intermittent trunk flexion. Measurements of trunk neuromuscular properties will be performed prior to and following the 60-min protocol.

Study Type

INTERVENTIONAL

Allocation

Purpose

BASIC_SCIENCE

Masking

NONE

Enrollment

Conditions

Occupational Exposure

Interventions

Repeated trunk flexionOTHER

A 60-min intermittent trunk flexion protocol. Participants will sit on a standard height sit, with their knees bent at approximately 90° with their hands crossed on their chest. They will perform 40 sets of 60 s of maintaining a flexed position, interspersed with 30 s of rest. Participants will achieve the flexed position by tilting the pelvis posteriorly and leaning forward. During rest, participants will sit up straight without leaning on the support.

Eligibility

Sex: ALLMin age: 18 YearsMax age: 40 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * Physically active at least 3 hours a week Exclusion Criteria: * Low back pain in the past 6 months * History of chronic low back pain * History of spinal or pelvic operation * Hypermobility, more than 4 points on Beighton scale * Cardiovascular or systemic diseases * Pregnancy

Locations (1)

University of Primorska, Faculty of Health Sciences

Izola, Primorska, Slovenia

Outcomes

Primary Outcomes

Change in muscle stiffness

Muscle stiffness will be measured in prone lying using ultrasound-based shear wave elastography. Erector spinae and multifidus muscle stiffness will be expressed as the shear modulus value in kilopasquals.

Time frame: 90 minutes

Secondary Outcomes

Change in range of motion

Trunk flexion range of motion will be evaluated using inertial measuring units during bending in standing position.

Time frame: 90 minutes

Change in length of the spine

The length of spine will be measured on a custom-developed stadiometer, with the participants in a seated position.

Time frame: 90 minutes

Change in muscle activity

Muscle activity will be measured using electromyography during standing.

Time frame: 90 minutes

Data from ClinicalTrials.gov

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