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An experimental study, which will aim to investigate the acute effects of unloading maneuvers during an intermittent spinal flexion protocol on changes in trunk mechanical and neuromuscular properties.
Our experimental study will include 30 participants. All participants will complete a 60-min intermittent spinal flexion protocol. During rest periods within the protocol, the participants from the intervention group will perform unloading maneuvers for the lumbar spine. Measurements of trunk mechanical and neuromuscular properties. will be performed prior to and following the 60-min protocol.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Control group | No Intervention | Adult participants completing only the spinal flexion protocol | |
| Intervention group | Experimental | Adult participants performing unloading maneuvers in between the spinal flexion protocol |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Unloading maneuvers | Other | Participants will perform unloading maneuvers four times with 15 min of spinal flexion protocol in between. The intervention will include self traction on a box (5 s) and sustained standing trunk extension (8 s). Both maneuvers will be repeated twice at each timepoint. |
| Measure | Description | Time Frame |
|---|---|---|
| Change in muscle stiffness | Muscle stiffness will be measured using ultrasound-based shear wave elastography during prone lying and forward stooping. Erector spinae and multifidus muscle stiffness will be expressed as the shear modulus value in kilopascals. | 90 minutes |
| Measure | Description | Time Frame |
|---|---|---|
| Change in range of motion | Trunk flexion range of motion will be evaluated using Spinal Mouse in maximal trunk flexion while standing. | 90 minutes |
| Change in seated spinal height | Seated spinal height will be measured on a custom-developed stadiometer, with the participants in a seated position. |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Matej Voglar, PhD | Contact | 0038656635803 | matej.voglar@fvz.upr.si | |
| Rok Vatovec, PhD | Contact | 0038656635802 | rok.vatovec@fvz.upr.si |
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Faculty of Health Sciences, University of Primorska | Recruiting | Izola | Primorska | 6310 | Slovenia |
Coded individual data will be uploaded on public scientific data repository.
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Cross-sectional study with intervention
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| 90 minutes |
| Change in lumbar lordosis angle | The lumbar lordosis angle will be evaluated using Spinal Mouse during upright standing. | 90 minutes |
| Change in trunk extension maximal strength | Isometric trunk extension peak torque will be assessed on a trunk dynamometer. | 90 minutes |