Locomotor training intensity after stroke: Effects of interval type and mode. Issue 7 (2nd October 2020)

• Record Type: Journal Article
• Authors: Boyne, Pierce; Scholl, Victoria; Doren, Sarah; Carl, Daniel; Billinger, Sandra A.; Reisman, Darcy S.; Gerson, Myron; Kissela, Brett; Vannest, Jennifer; Dunning, Kari
• Is Part Of: Topics in stroke rehabilitation. Volume 27:Issue 7(2020)
• Page Start: 483
• Page End: 493
• Publication Date: 2020-10-02
• Subjects: Aerobic exercise -- high-intensity interval training -- locomotion -- treadmill -- overground; Cerebrovascular disease -- Patients -- Rehabilitation -- Periodicals; Cerebrovascular disease -- Periodicals; 616.810305
• DOI: 10.1080/10749357.2020.1728953
• Languages: English
• ISSNs: 1074-9357

Abstract

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.