Inspiratory Resistive Loading and Proprioceptive Postural Control

Study Overview
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Brief Summary
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Proprioceptive weighting changes may explain differences in postural control performance. In addition, the respiratory movement has a disturbing effect on postural balance. Postural balance seems to be impaired in individuals with respiratory disorders. Besides the essential role of respiration, the diaphragm may also play an important role in the control of the trunk and postural balance. Deficits in proprioception are found in a subgroup of patients with low back pain. In addition, disorders of respiration have been identified as strongly related to low back pain. The aim of the study is to clarify whether loading of the inspiratory muscles has a negative effect upon proprioceptive postural control in healthy individuals and individuals with recurrent low back pain.

Official Title
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Inspiratory Resistive Loading and Proprioceptive Postural Control in Healthy Individuals and Individuals With Recurrent Low Back Pain

Conditions
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Low Back Pain, Respiratory Loading, Proprioceptive Impairment

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria individuals with low back pain: Age: 18-45 years old At least 1 year of low back pain with/without referred pain in buttock/thigh At least 3 episodes of disabling low back pain At least a score of 20% on the Oswestry Disability Index Willingness to sign the informed consent Inclusion Criteria healthy individuals: Age: 18-45 years old No history of low back pain A score of 0% on the Oswestry Disability Index Willingness to sign the informed consent Exclusion Criteria: History of major trauma and/or major orthopedic surgery of the spine, the pelvis or the lower quadrant One of the following conditions: Parkinson, multiple sclerosis, stroke, history of vestibular disorder, respiratory disease, pregnancy Radicular symptoms Not Dutch-speaking Strong opioids Neck pain Smoking history

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 45 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Healthy individuals<br> | |
| Individuals with low back pain<br> | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Proprioceptive postural control | Center of pressure displacement (force plate) in standing in response to local muscle vibration on ankle and back muscles to specifically detect the role of proprioception in postural control. | 1 year | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Back muscle oxygenation | Near infrared spectroscopy: tissue oxygenation index (TOI) and haemoglobin | 1 year | 
| Kinematics | piezoresistive accelerometers | 1 year | 
| Respiratory muscle force | maximal inspiratory pressure - maximal expiratory pressure | 1 year |