High-intensity step training that mimics real-world conditions may better improve walking ability in stroke survivors compared to traditional, low-impact training, according to new research published in the American Heart Association’s journal Stroke.
The recent research is vital for residents of Houston, a city that is part of the Stroke Belt, a medical nickname given to describe an 8-state region with high stroke mortality across the southeastern United States.
The suggestion of the research is that stroke patients can perform higher intensity walking exercises and more difficult tasks than previously thought possible. The idea is for patients to move beyond traditional, low-intensity rehabilitation to challenge the nervous and cardiovascular systems so patients can improve function and perform better in the real world.
“People who suffer strokes often have difficulty walking and impaired balance. Rehabilitation after a stroke traditionally focuses on patients practicing low-intensity walking, usually only in a forward direction, which does not provide enough of a challenge to the nervous system to enable patients to negotiate real-world situations, such as uneven surfaces, stairs or changing direction,” said study author T. George Hornby, Ph.D., professor of physical medicine and rehabilitation at Indiana University School of Medicine in Indianapolis.
Participants received training of either high-intensity stepping performing variable, difficult tasks; high-intensity stepping performing only forward walking; or low-intensity stepping of variable tasks. Variable tasks included walking on uneven surfaces, up inclines and stairs, over randomly placed obstacles on a treadmill and across a balance beam.
Researchers evaluated 90 people, 18- to 85-years-old with weakness on one side of the body who had survived a stroke at least six months prior. The study was small compared to larger, multicenter clinical trials. Hornby said the next step would be to test high-intensity, variable step training in larger patient populations in a large, multicenter clinical trial.
This is what the researchers found:
- Survivors in both the high-intensity, variable training and high-intensity, forward walking groups walked faster and farther than the low-intensity, variable training group.
- For all walking outcomes, 57% to 80% of participants in the high-intensity groups had important clinical gains, while only 9% to 31% of participants did so following low-intensity training.
- High-intensity variable training also resulted in improved dynamic balance while walking and improved balance confidence.
Ultimately, the goal is to incorporate high-intensity variable step training into regular clinical rehabilitation protocols.