Pierce Boyne1, Victoria Scholl1, Sarah Doren1, Daniel Carl1, Sandra A Billinger2, Darcy S Reisman3, Myron Gerson4, Brett Kissela5, Jennifer Vannest6,7, Kari Dunning1. 1. Department of Rehabilitation, Exercise and Nutrition Sciences, College of Allied Health Sciences, University of Cincinnati , Cincinnati, OH, USA. 2. Department of Physical Therapy and Rehabilitation Science, School of Health Professions, University of Kansas Medical Center , Kansas City, KS, USA. 3. Department of Physical Therapy, College of Health Sciences, University of Delaware , Newark, DE, USA. 4. Departments of Internal Medicine and Cardiology, College of Medicine, University of Cincinnati , Cincinnati, OH, USA. 5. Department of Neurology and Rehabilitation Medicine, College of Medicine, University of Cincinnati , Cincinnati, OH, USA. 6. Department of Communication Sciences and Disorders, College of Allied Health Sciences, University of Cincinnati , Cincinnati, OH, USA. 7. Pediatric Neuroimaging Research Consortium, Cincinnati Children's Hospital Medical Center , Cincinnati, OH, USA.
Abstract
Background and Objectives: High-intensity interval training (HIIT) is a promising strategy for improving gait and fitness after stroke, but optimal parameters remain unknown. We tested the effects of short vs long interval type and over-ground vs treadmill mode on training intensity. Methods: Using a repeated measures design, 10 participants with chronic hemiparesis performed 12 HIIT sessions over 4 weeks, alternating between short and long-interval HIIT sessions. Both protocols included 10 minutes of over-ground HIIT, 20 minutes of treadmill HIIT and another 10 minutes over-ground. Short-interval HIIT involved 30 second bursts at maximum safe speed and 30-60 second rest periods. Long-interval HIIT involved 4-minute bursts at ~90% of peak heart rate (HRpeak) and 3-minute recovery periods at ~70% HRpeak. Results: Compared with long-interval HIIT, short-interval HIIT had significantly faster mean overground speeds (0.75 vs 0.67 m/s) and treadmill speeds (0.90 vs 0.51 m/s), with similar mean treadmill HR (82.9 vs 81.8%HRpeak) and session perceived exertion (16.3 vs 16.3), but lower overground HR (78.4 vs 81.1%HRpeak) and session step counts (1481 vs 1672). For short-interval HIIT, training speeds and HR were significantly higher on the treadmill vs. overground. For long-interval HIIT, the treadmill elicited HR similar to overground training at significantly slower speeds. Conclusions: Both short and long-interval HIIT elicit high intensities but emphasize different dosing parameters. From these preliminary findings and previous studies, we hypothesize that overground and treadmill short-interval HIIT could be optimal for improving gait speed and overground long-interval HIIT could be optimal for improving gait endurance.
Background and Objectives: High-intensity interval training (HIIT) is a promising strategy for improving gait and fitness after stroke, but optimal parameters remain unknown. We tested the effects of short vs long interval type and over-ground vs treadmill mode on training intensity. Methods: Using a repeated measures design, 10 participants with chronic hemiparesis performed 12 HIIT sessions over 4 weeks, alternating between short and long-interval HIIT sessions. Both protocols included 10 minutes of over-ground HIIT, 20 minutes of treadmill HIIT and another 10 minutes over-ground. Short-interval HIIT involved 30 second bursts at maximum safe speed and 30-60 second rest periods. Long-interval HIIT involved 4-minute bursts at ~90% of peak heart rate (HRpeak) and 3-minute recovery periods at ~70% HRpeak. Results: Compared with long-interval HIIT, short-interval HIIT had significantly faster mean overground speeds (0.75 vs 0.67 m/s) and treadmill speeds (0.90 vs 0.51 m/s), with similar mean treadmill HR (82.9 vs 81.8%HRpeak) and session perceived exertion (16.3 vs 16.3), but lower overground HR (78.4 vs 81.1%HRpeak) and session step counts (1481 vs 1672). For short-interval HIIT, training speeds and HR were significantly higher on the treadmill vs. overground. For long-interval HIIT, the treadmill elicited HR similar to overground training at significantly slower speeds. Conclusions: Both short and long-interval HIIT elicit high intensities but emphasize different dosing parameters. From these preliminary findings and previous studies, we hypothesize that overground and treadmill short-interval HIIT could be optimal for improving gait speed and overground long-interval HIIT could be optimal for improving gait endurance.
Authors: Tara D Klassen; Jennifer A Semrau; Sean P Dukelow; Mark T Bayley; Michael D Hill; Janice J Eng Journal: Stroke Date: 2017-08-07 Impact factor: 7.914
Authors: Alicen A Whitaker; Stacey E Aaron; Carolyn S Kaufman; Brady K Kurtz; Stephen X Bai; Eric D Vidoni; Robert N Montgomery; Sandra A Billinger Journal: J Appl Physiol (1985) Date: 2021-12-09
Authors: Pierce Boyne; Sarah Doren; Victoria Scholl; Emily Staggs; Dustyn Whitesel; Daniel Carl; Rhonna Shatz; Russell Sawyer; Oluwole O Awosika; Darcy S Reisman; Sandra A Billinger; Brett Kissela; Jennifer Vannest; Kari Dunning Journal: Front Neurol Date: 2022-02-04 Impact factor: 4.086