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Related Experiment Video

Updated: May 7, 2026

A Real-World High-Intensity Interval Training Protocol for Cardiorespiratory Fitness Improvement

A Real-World High-Intensity Interval Training Protocol for Cardiorespiratory Fitness Improvement

Published on: February 22, 2022

Home-Based Supervised Cardiorespiratory Interval Training Decreases Poststroke Fatigue and Improves Cardiorespiratory

Anna Bråndal^1,2, Maria Svedjebrant^3,4, Ylva Nilsagård^4,5

¹Department of Public Health and Clinical Medicine, Umeå University, Sweden (A.B., P.W.).

|May 6, 2026

Summary

Home-based aerobic exercise significantly reduced poststroke fatigue (PSF) and improved fitness in survivors. This supervised interval training program offers a safe and effective rehabilitation strategy for managing PSF.

Keywords:

cardiorespiratory fitness exercise fatigue stroke survivors

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Area of Science:

Cardiovascular Rehabilitation
Neurology
Exercise Physiology

Background:

Poststroke fatigue (PSF) impacts nearly half of stroke survivors, hindering recovery and daily life.
Currently, no established treatments exist for PSF.
Low cardiorespiratory fitness is a potential contributor to PSF, suggesting aerobic exercise as a viable intervention.

Purpose of the Study:

To evaluate a home-based, supervised cardiorespiratory interval training program (HS-CITP) for individuals experiencing poststroke fatigue.
To assess the impact of HS-CITP on fatigue levels and cardiorespiratory fitness in stroke survivors.

Main Methods:

A 2-center, randomized, open-label trial involving 45 participants 1-7 months poststroke with PSF.
Participants were assigned to either HS-CITP (35-minute cycling sessions, 3x/week for 8 weeks) or usual care.
Primary outcome: fatigue (Swedish Fatigue Assessment Scale); Secondary outcome: peak oxygen uptake.

Main Results:

HS-CITP significantly reduced fatigue by -5.35 points on the Swedish Fatigue Assessment Scale compared to usual care (P<0.001).
Cardiorespiratory fitness improved by +4.48 mL/kg/min in the HS-CITP group (P<0.001).
The program demonstrated 92% adherence with no reported adverse events.

Conclusions:

Supervised home-based interval training effectively reduces poststroke fatigue and enhances cardiorespiratory fitness.
The findings support the integration of structured aerobic exercise into stroke rehabilitation protocols.
Further research is needed to confirm long-term effects and optimal timing poststroke.