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High-intensity Interval Training After Stroke

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT03942588
Recruitment Status : Completed
First Posted : May 8, 2019
Last Update Posted : May 9, 2019
Arizona State University
Information provided by (Responsible Party):
Pamela Rogers Bosch, Northern Arizona University

Tracking Information
First Submitted Date  ICMJE February 14, 2019
First Posted Date  ICMJE May 8, 2019
Last Update Posted Date May 9, 2019
Actual Study Start Date  ICMJE September 24, 2014
Actual Primary Completion Date June 8, 2018   (Final data collection date for primary outcome measure)
Current Primary Outcome Measures  ICMJE
 (submitted: May 6, 2019)
Change in Aerobic Capacity [ Time Frame: Baseline and 12 weeks ]
Whole-body oxygen consumption measured via a graded exercise test
Original Primary Outcome Measures  ICMJE Same as current
Change History
Current Secondary Outcome Measures  ICMJE Not Provided
Original Secondary Outcome Measures  ICMJE Not Provided
Current Other Pre-specified Outcome Measures Not Provided
Original Other Pre-specified Outcome Measures Not Provided
Descriptive Information
Brief Title  ICMJE High-intensity Interval Training After Stroke
Official Title  ICMJE High-intensity Interval Training for Adults With Chronic Stroke Impairments: A Pilot Feasibility Study
Brief Summary Aerobic conditioning is very important after stroke as it may reduce the risk of subsequent stroke and overall mortality. High-intensity interval training (HIIT), in which aerobic training workload is varied between lower and higher intensity bouts within a training session, is known to be effective for maximizing aerobic capacity in healthy individuals and those with cardiac disease. HIIT has not been studied extensively in adults with stroke, but it could be an efficient way to maximize aerobic capacity in this population. Furthermore, using heart rate response to establish training intensity may lead to underestimation of target intensity after stroke because blood pressure medications may blunt the heart rate response. Ventilatory threshold is an alternate method of establishing training intensity and is derived independently of heart rate response. The investigators hypothesized that a 10-week program of treadmill HIIT with intensity based on ventilatory threshold would be feasible in adults at least 6 months post-stroke, and would increase aerobic capacity.
Detailed Description

Stroke is the main cause of serious, long-term disability among Americans. The effects of a stroke make it difficult to participate in routine, daily activities so people become seriously deconditioned after a stroke. This increases the chances of having another stroke and it also increases the risk of death. Even a small increase in aerobic capacity reduces these risks, making aerobic training an important component of post-stroke management.

Twenty to 60 minutes of moderate-intensity exercise on most days of the week is recommended for people with cardiovascular disease, but this is not very practical for many people after a stroke, who need to practice functional tasks like using the impaired arm and improving walking and balance. Another problem is that even when people do participate in aerobic training after a stroke, the improvements in aerobic capacity are sometimes surprisingly small. It is possible that the intensity of the training program was inadequate to improve aerobic capacity in some interventions. High-intensity interval training, in which people alternate between short, intense bouts of exercise and recovery bouts within the session, may be a way to improve aerobic capacity after a stroke with a more feasible training schedule that leaves time to practice functional skills too. High-intensity interval training on a treadmill might be appropriate to improve aerobic capacity and walking ability.

This non-randomized, non-blinded pilot study was designed to assess the feasibility of ten weeks of high-intensity interval training (HIIT) using treadmill training for adults with impaired walking who were at least 6 months post-stroke.

A secondary objective was to measure change in aerobic capacity, and a tertiary objective was to measure functional change in self-selected walking speed and leg strength as a result of the intervention.

10 participants completed HIIT intervention while 5 participants served as controls and received no intervention, but completed both baseline and post-testing sessions.

HIIT participants completed twice-weekly, 35-minute training sessions in a research laboratory for 10 consecutive weeks. At baseline and 12 weeks, all participants completed a graded exercise test, 10-meter walk test at self-selected and fastest, safe overground walking speeds, and a 30-second sit-to-stand test.

Study Type  ICMJE Interventional
Study Phase  ICMJE Not Applicable
Study Design  ICMJE Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Intervention Model Description:
Exercise Intervention group and Usual Activity Control group
Masking: None (Open Label)
Primary Purpose: Treatment
Condition  ICMJE
  • Stroke, Ischemic
  • Stroke Hemorrhagic
Intervention  ICMJE Behavioral: High-intensity interval training
Study Arms  ICMJE
  • Experimental: High-intensity interval training
    Twice-weekly supervised high-intensity interval treadmill training in a laboratory setting for 10 weeks.
    Intervention: Behavioral: High-intensity interval training
  • No Intervention: Control
    Usual activities for 10 weeks
Publications *

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
Recruitment Information
Recruitment Status  ICMJE Completed
Actual Enrollment  ICMJE
 (submitted: May 6, 2019)
Original Actual Enrollment  ICMJE Same as current
Actual Study Completion Date  ICMJE June 8, 2018
Actual Primary Completion Date June 8, 2018   (Final data collection date for primary outcome measure)
Eligibility Criteria  ICMJE

Inclusion Criteria:

  • Male and female adults 18 years of age or older who had a unilateral stroke at least 6 months prior to enrollment
  • Ability to provide informed consent and follow instructions to participate
  • Medically stable
  • Must be able to walk with no more than contact guard assistance on level surfaces
  • Must be willing to walk on a treadmill with a support harness and handrail

Exclusion Criteria:

  • Cerebellar stroke
  • Medical instability
  • Implanted pacemaker or defibrillator
  • Inability to walk on a treadmill with a support harness and use of handrail for at least 5 minutes
  • Absence of walking impairments
  • Abnormal resting heart rate, blood pressure or ECG
  • Abnormal ECG during graded exercise test
Sex/Gender  ICMJE
Sexes Eligible for Study: All
Ages  ICMJE 18 Years and older   (Adult, Older Adult)
Accepts Healthy Volunteers  ICMJE No
Contacts  ICMJE Contact information is only displayed when the study is recruiting subjects
Listed Location Countries  ICMJE Not Provided
Removed Location Countries  
Administrative Information
NCT Number  ICMJE NCT03942588
Other Study ID Numbers  ICMJE 1002492
Has Data Monitoring Committee No
U.S. FDA-regulated Product
Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
IPD Sharing Statement  ICMJE
Plan to Share IPD: No
Responsible Party Pamela Rogers Bosch, Northern Arizona University
Study Sponsor  ICMJE Northern Arizona University
Collaborators  ICMJE Arizona State University
Investigators  ICMJE
Principal Investigator: Pamela R Bosch, PhD Northern Arizona University
PRS Account Northern Arizona University
Verification Date May 2019

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP