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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.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Intermittent trunk flexion | Experimental | 60-min intermittent trunk flexion protocol. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Repeated trunk flexion | Other | 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. |
| Measure | Description | Time Frame |
|---|---|---|
| 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. | 90 minutes |
| Measure | Description | Time Frame |
|---|---|---|
| Change in range of motion | Trunk flexion range of motion will be evaluated using inertial measuring units during bending in standing position. | 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. |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Matej Voglar, PhD | University of Primorska, Faculty of Health Sciences | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| University of Primorska, Faculty of Health Sciences | Izola | Primorska | 6310 | Slovenia |
Coded individual data will be uploaded on public scientific data repository.
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| ID | Term |
|---|---|
| D000402 | Airway Obstruction |
| ID | Term |
|---|---|
| D012131 | Respiratory Insufficiency |
| D012120 | Respiration Disorders |
| D012140 | Respiratory Tract Diseases |
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|
| 90 minutes |
| Change in muscle activity | Muscle activity will be measured using electromyography during standing. | 90 minutes |