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Optimization of Hip-exoskeleton Weight Attributes

Sponsor
University of Texas at Austin (Other)
Overall Status
Recruiting
CT.gov ID
NCT05120115
Collaborator
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) (NIH)
40
Enrollment
1
Location
3
Arms
20.7
Anticipated Duration (Months)
1.9
Patients Per Site Per Month

Study Details

Study Description

Brief Summary

The investigators are examining how weight distribution affects the way people walk, in terms of energy expenditure, joint kinematics, kinetics, and muscle activity. The investigators are measuring these quantities while people walk while wearing a weighted belt. The investigators distribute the weights and walk for specified periods. They hypothesize that greater weight will have a greater effect on walking.

Condition or Disease Intervention/Treatment Phase
  • Other: Weight belt
 N/A

Detailed Description

The purpose of this study is to examine how the amount and distribution of weight on the pelvis affects how people walk. The investigators have three factors, weight location, amount of weight and walking speed. They are examining how these factors affect energy expenditure, muscle activation, joint motions and foot forces. The investigators plan to recruit 40 healthy adult individuals. Each of the 20 experimental conditions (2x3x3 factorial and two control conditions with no weight) will be recorded immediately in a single session. The investigators hypothesize that weight amount, gait speed and weight distribution will all affect how people walk, which will lead towards optimized design of hip exoskeletons.

Study Design

Study Type:
Interventional
Anticipated Enrollment :
40 participants
Allocation:
Non-Randomized
Intervention Model:
Single Group Assignment
Masking:
None (Open Label)
Primary Purpose:
Basic Science
Official Title:
Evaluating Optimal Weight Design Parameters of a Hip Exoskeleton Designed for Rehabilitation.
Actual Study Start Date :
Oct 7, 2021
Anticipated Primary Completion Date :
Jun 30, 2022
Anticipated Study Completion Date :
Jun 30, 2023

Arms and Interventions

Arm Intervention/Treatment
Experimental: Walking Speed

Changing speed of treadmill

Other: Weight belt
Wearing belt around waist with various weights attached.
Experimental: Weight distribution

Changing where weight is distributed on belt around pelvis, specifically, bilaterally, 4th lumbar area, unilaterally on the left side.

Other: Weight belt
Wearing belt around waist with various weights attached.
Experimental: Weight amount

Changing the amount of weight used in belt around pelvis, 0 kg, 2 kg, 4 kg, and 6 kg.

Other: Weight belt
Wearing belt around waist with various weights attached.

Outcome Measures

Primary Outcome Measures

  1. Pelvic range of motion [One day]

    Amount of pelvic obliquity in response to weighted belt measured using optical motion capture

Secondary Outcome Measures

  1. Knee flexion angle during swing phase [One Day]

    Knee flexion angle measured using optical motion capture

  2. Gastrocnemius muscle activity during preswing [One day]

    Measured myographic muscle activity in gastrocnemius

Eligibility Criteria

Criteria

Ages Eligible for Study:
18 Years to 65 Years
Sexes Eligible for Study:
All
Accepts Healthy Volunteers:
Yes
Inclusion Criteria:
  • Willing to commit to the full experimental session
Exclusion Criteria:

  • Functionally relevant lower limb musculoskeletal injury

  • Functionally relevant osteoarthritis and weight bearing restrictions

  • Severe respiratory problems that restrict the wearer from using a metabolic rate apparatus

  • Patients with cardiac issues may be included, but the cardiac issue will be noted in the health history questionnaire

Contacts and Locations

Locations

Site City State Country Postal Code
1 University of Texas at Austin Austin Texas United States 78712

Sponsors and Collaborators

  • University of Texas at Austin
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)

Investigators

None specified.

Study Documents (Full-Text)

None provided.

More Information

Publications

None provided.
Responsible Party:
University of Texas at Austin
ClinicalTrials.gov Identifier:
NCT05120115
Other Study ID Numbers:
  • STUDY00001245
  • R01HD100416
First Posted:
Nov 15, 2021
Last Update Posted:
Nov 15, 2021
Last Verified:
Nov 1, 2021
Studies a U.S. FDA-regulated Drug Product:
No
Studies a U.S. FDA-regulated Device Product:
No
Additional relevant MeSH terms:
Gait Disorders, Neurologic

Study Results

No Results Posted as of Nov 15, 2021