Effects of High-Intensity Interval Training After Stroke (the HIIT-Stroke Study): A Multicenter Randomized Controlled...

Area of Science:

• Cardiovascular Rehabilitation
• Exercise Physiology
• Neurology

Background:

• Stroke survivors often experience reduced cardiorespiratory fitness, impacting functional recovery and quality of life.
• Standard care may not be sufficient to optimize cardiorespiratory capacity post-stroke.

Purpose of the Study:

• To determine if 8 weeks of high-intensity interval training (HIIT) plus standard care improves peak oxygen uptake (Vo2peak) in stroke survivors compared to standard care alone.
• To assess the maintenance of Vo2peak at 12 months post-intervention.

Main Methods:

• A single-blind, multicenter, randomized controlled trial involving 70 stroke survivors.
• Intervention group received 8 weeks of thrice-weekly HIIT treadmill training.
• Control group received standard care; Vo2peak was measured at baseline and 12 months.

Main Results:

• No significant difference in Vo2peak was observed between the HIIT and control groups at 12 months (P=.068).
• The HIIT group showed significant improvements in 3 of 6 secondary peak test outcomes compared to the control group at 12 months.
• No significant differences in blood pressure or blood profile were found between groups.

Conclusions:

• Eight weeks of HIIT in addition to standard care did not superiorly improve or maintain Vo2peak in well-functioning stroke survivors at 12 months.
• HIIT was well-tolerated and demonstrated short-term benefits in secondary peak test outcomes.
• Further research may explore optimal HIIT protocols for stroke rehabilitation.