Validity and Reliability of a Low-cost Chair Dynamometer

Study Overview
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Brief Summary
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In part 1 of the study, fourteen able-bodied individuals will undergo maximal, voluntary contraction (MVC) test of the lower limbs in two dynamometers. One being a low-cost dynamometer (S2P-CD), and the other being a gold standard dynamometer (HUMAC). Thereby the investigators will be able to assess the validity of the S2P-CD. In part 2 of the study, eighteen persons with spinal cord injury will undergo MVC twice in the S2P-CD. Thereby the investigators will be able to assess the reliability of the measurements of the S2P-CD.

Detailed Description
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In part 1 of the study, fourteen able-bodied individuals will undergo maximal, voluntary contraction (MVC) test of the lower limbs in two dynamometers. One being a low-cost dynamometer (S2P-CD), and the other being a gold standard dynamometer (HUMAC). The tests will be carried out with 72-96 hours between them. Thereby the investigators will be able to assess the validity of the S2P-CD. In part 2 of the study, eighteen persons with spinal cord injury will undergo MVC twice in the S2P-CD. Participants will be recruited through the Spinal Cord Injury Centre of Western Denmark (SCIWDK). The test will be carried out with 30min between them. Thereby the investigators will be able to assess the reliability of the measurements of the S2P-CD.

Official Title
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Validity and Reliability of a Low-cost Chair Dynamometer

Conditions
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Spinal Cord Injuries

Intervention / Treatment
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* Diagnostic Test: Dynamometry


Participation Criteria
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Eligibility Criteria
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Ablebodied individuals: Inclusion Criteria: Age >18 y Exclusion Criteria: Orthopedic or other injuries that may limit maximal muscle strength Spinal cord injured individuals: Inclusion Criteria: Age > 18 y Congenital or acquired spinal cord injury with some degree of preserved muscle function in the lower limbs Exclusion Criteria: Orthopedic or other injuries that may limit maximal muscle strength Significant competing diseases Severe osteoperosis

Ages Eligible for Study
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Minimum Age: 18 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 |
| --- | --- |
| Ablebodied individuals<br> | Diagnostic Test: Dynamometry<br>* A test for maximal muscle strength and explosive power in the lower limbs<br>|
| Spinal Cord Injured Individuals<br> | Diagnostic Test: Dynamometry<br>* A test for maximal muscle strength and explosive power in the lower limbs<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Maximal voluntary contraction | Maximal muscle strength | 15min | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Rate of force development | Explosive muscle strength | 15min |