Task-oriented Training for Stroke: Impact on Function Mobility

Not Applicable

Completed

• Conditions: Cerebrovascular Accident; Stroke
• Interventions: Behavioral: High-intensity Treadmill Exercise; Behavioral: Low-intensity Lifestyle Intervention

• Registration Number: NCT01322607
• Lead Sponsor: VA Office of Research and Development

Brief Summary

Residual neurological deficits from stroke lead to gait inefficiencies, resulting in an extremely high energy cost of movement and contributing to overall disability and lower quality of life. Therefore, interventions targeting movement economy should be developed for those in the chronic phase of stroke recovery. This study is designed to compare the effect of two distinctly different exercise paradigms (a higher-intensity treadmill training program and a lower-intensity group exercise program) on economy of movement during over-ground walking and activities of daily living, as well as the extent to which gains in muscular strength, muscular endurance, and balance predict changes in movement economy.

Detailed Description

Not available

Basic Information
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Recruitment & Eligibility
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Study & Design
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Trial Locations

Study Timeline

• Study First Submitted: 2011-03-22
• Study First Submitted QC: 2011-03-22
• Study First Posted: 2011-03-24
• Study Start: 2011-07
• Primary Completion: 2014-01
• Study Completion: 2015-01
• Results First Submitted: 2015-11-23
• Status Verified: 2016-03
• Results First Submitted QC: 2016-03-07
• Last Update Submitted: 2016-03-07
• Results First Posted: 2016-04-06
• Last Update Posted: 2016-04-06

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 20

Inclusion Criteria

• Stroke > 6 months prior with residual hemiparetic gait in women or men aged 40-85 years.
• Completion of all regular post-stroke physical therapy
• Adequate language and neurocognitive function to participate in testing and training and to give adequate informed consent.
• Able to rise from a chair unaided.
• Able to walk 10 meters without human assistance.

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Exclusion Criteria

• Regular structured aerobic exercise (> 2x week).

• Alcohol consumption > 3 oz. liquor, or 3 x 4 oz glasses of wine, or 3 x 12 oz. beers per day, by self-report.

• Clinical history of

  • unstable angina,
  • recent (< 3 months) myocardial infarction or congestive heart failure (NYHA category II),
  • hemodynamically significant valvular dysfunction,
  • Peripheral Arterial Obstructive Disease with claudication,
  • major orthopedic, chronic pain, or non-stroke neuromuscular disorders restricting exercise,
  • pulmonary or renal failure,
  • poorly controlled hypertension (>190/110), measured on at least two separate occasions
  • recent hospitalization for severe disease or surgery
  • severe or global receptive aphasia which confounds reliable testing and training.

• Untreated major depression as documented by a Center for Epidemiological Studies-Depression score of >16 and confirmed by clinical interview.

• Pregnancy.

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Arm 1: High-Intensity Program	High-intensity Treadmill Exercise	High-intensity treadmill-based exercise
Arm 2: Low-Intensity Program	Low-intensity Lifestyle Intervention	Low-intensity lifestyle intervention (group exercise)

Primary Outcome Measures

Name	Time	Method
Economy of Gait	3 months	Over-ground gait economy measured using a portable metabolic monitoring system, K4b2 during a 6 minute walk, with subjects walking at their comfortable self-selected walking speed while open circuit spirometry collects break-by-break data. The K4b2 consists of a small battery pack and portable gas analyser (weighing less than 1 kg) that participants wear on their chest. Attached to the portable system is a flexible rubber facemask with flowmeter used for breath-by-breath analysis. The mean rate of oxygen consumption (VO2) will be calculated based on the final 3 minutes of a 6-minute walk under steady state oxygen consumption conditions. A 6 minute walk is a distance most representative of community-based ambulatory capacity and is a sensitive outcome measure in exercise studies in chronic stroke subjects. The higher the VO2 used during the 6 minute walk, represents a less efficient economy of gait.

Secondary Outcome Measures

Name	Time	Method
Muscular Endurance	3 months	Muscular endurance performed on Leg Press and assessed by a force transducer, while seated. The longer the amount of time participant can maintain a force the better their muscular endurance.
Balance	3 months	Dynamic Gait Index - another measure related to balance and general function. It includes items of walking while changing speed, turning the head, pivot turning, walking over and around obstacles, and stair climbing. This index ranges from 0 - 24, with 24 representing a high level of balance and general function (the higher the score the better the balance).
Muscular Strength	3 months	Strength measured by torque of isokinetic maximal concentric knee extensor volitional contractions of paretic and non-paretic leg at multiple angular velocities (30, 90, and 120°/sec). The higher the number the higher the muscular strength. Also performed on resistance equipment for both the Leg Press and Leg Extension. The higher the number the stronger a person is.

Trial Locations

Locations (1)

Baltimore VA Medical Center VA Maryland Health Care System, Baltimore, MD; 🇺🇸 Baltimore, Maryland, United States