A Study to Evaluate Spine Motion in Older Adults

Study Overview
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Brief Summary
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This study is being done to measure real-world motions and forces in the spine during everyday activities. This information will be used to develop and validate a computer model of how the spine moves and determine injury risk.

Detailed Description
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Kinematic motion data will be collected at 120 Hz using a 14-camera Real Time Motion Analysis system. Cortex software (Motion Analysis Corp., Rohnert Park, CA) will be used to visualize the data during physical activities. A developed Matlab code will be used for data analysis. Statistical parametric mapping (SPM) will be used to collect the entire kinematic motion waveforms to compare motion profiles of different individuals. Also, the peak values for each activity will be captured for statistical analysis. Muscle response and electrical activity, which will be used to estimate muscle forces, will be recorded during gait analysis from the paraspinal lumbar muscles using an EMG system. Surface electrodes will be attached to the lumbar spine. EMG data will be collected at 2400 Hz. For each participant, the investigators will record five trials per activity. Additionally, gait speed as well as static and dynamic balance will assess. Knee and grip strength will also be measured. Finally, physical activity levels will be assessed both objectively and subjectively.

Official Title
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Lumbar Spine Range of Motion and EMG Outcomes in Older Adults

Conditions
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Healthy

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Age 50 and over Ability to perform trunk flexion, lateral bending, and axial rotation, as well as lift at least 5 pounds of weight from the floor Exclusion Criteria: Spinal pathologies Physiological and neuromuscular disorders BMI>35 Knee or hip replacement in the past 12 months Use of assistive devices Frailty: with FRAIL score of 3 or greater

Ages Eligible for Study
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Minimum Age: 50 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 |
| --- | --- |
| Men aged 50-64<br> | |
| Men aged 65 and over<br> | |
| Women aged 50-64<br> | |
| Women aged 65 and over<br> | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Thoracic and lumbar spine ranges of motions in degrees |  | Day 1 | 
| Paraspinal muscle activities in Newtons |  | Day 1 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Upper extremity strength in Newtons |  | Day 1 | 
| Lower extremity strength in Newton-meters |  | Day 1 | 
| Physical activity levels measured by IPAQ questionnaire in MET-minutes per week | MET (metabolic equivalent task) is defined as 1 kcal/kg/hour | Day 1 | 
| Physical activity levels measured by accelerometry in MET-minutes per week |  | Day 5 |