Preliminary safety analysis of high-intensity interval training (HIIT) in persons with chronic stroke.
The purpose of this study was to assess safety via electrocardiographic (ECG), blood pressure (BP), heart rate (HR), and orthopedic responses to 3 different high-intensity interval training (HIIT) protocols in persons with stroke. Eighteen participants (10 male; 61.9 + 8.3 years of age; 5.8 + 4.2 years poststroke) completed a symptom-limited graded exercise test (GXT) with ECG monitoring to screen for eligibility and determine HR peak. The 3 HIIT protocols involved repeated 30 s bursts of treadmill walking at maximum speed alternated with rest periods of 30 s (P30), 1 min (P60), or 2 min (P120). Sessions were performed in random order and included 5 min warm up, 20 min HIIT, and 5 min cool down. Variables measured included ECG activity, BP, HR, signs and symptoms of cardiovascular intolerance, and orthopedic concerns. Generalized linear mixed models and Tukey-Kramer adjustment were used to compare protocols using p < 0.05. No signs or symptoms of cardiovascular intolerance, significant arrhythmias, ST segment changes, or orthopedic responses resulted in early termination of any HIIT session. HIIT elicited HRs in excess of 88% of measured HRpeakincluding 6 (P30), 8 (P60), and 2 (P120) participants eliciting a HR response above their GXT HRpeak. Both maximum BP and HR were significantly higher in P30 and P60 relative to P120. Preliminary data indicate that persons with chronic stroke who have been prescreened with an ECG stress test, a symptom-limited GXT, and a harness for fall protection may safely participate in HIIT, generating substantially higher HRs than what is seen in traditional moderate intensity training.
a Department of Rehabilitation Sciences, College of Allied Health Sciences, 3202 Eden Avenue, University of Cincinnati, Cincinnati, OH 45220-0394, USA.
Daniel L
DL
Carl
a Department of Rehabilitation Sciences, College of Allied Health Sciences, 3202 Eden Avenue, University of Cincinnati, Cincinnati, OH 45220-0394, USA.|b Department of Environmental Health, College of Medicine, University of Cincinnati, Cincinnati, OH, USA.
Pierce
P
Boyne
a Department of Rehabilitation Sciences, College of Allied Health Sciences, 3202 Eden Avenue, University of Cincinnati, Cincinnati, OH 45220-0394, USA.
Bradley
B
Rockwell
c Departments of Internal Medicine and Cardiology, College of Medicine, University of Cincinnati, Cincinnati, OH, USA.
Myron
M
Gerson
b Department of Environmental Health, College of Medicine, University of Cincinnati, Cincinnati, OH, USA.|d Division of Biostatistics and Epidemiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
Jane
J
Khoury
e Department of Neurology and Rehabilitation Medicine, College of Medicine, University of Cincinnati, Cincinnati, OH, USA.
Brett
B
Kissela
a Department of Rehabilitation Sciences, College of Allied Health Sciences, 3202 Eden Avenue, University of Cincinnati, Cincinnati, OH 45220-0394, USA.|b Department of Environmental Health, College of Medicine, University of Cincinnati, Cincinnati, OH, USA.
Kari
K
Dunning
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001794:Blood Pressure / Q000502:physiology; D002908:Chronic Disease; D018592:Cross-Over Studies; D004562:Electrocardiography; D005080:Exercise Test; D005081:Exercise Therapy / Q000379:methods*; D005260:Female; D006339:Heart Rate / Q000502:physiology; D000072696:High-Intensity Interval Training; D006801:Humans; D008297:Male; D008875:Middle Aged; D010101:Oxygen Consumption; D010807:Physical Endurance; D018570:Risk Assessment; D020521:Stroke / Q000628:therapy*
AVC; and rehabilitation; entraînement par intervalle d’intensité élevée (HIIT); exercice physique; exercise; high-intensity interval training (HIIT); réadaptation; stroke