Key result
During a 30-minute aerobic exercise session, chronic stroke patients showed moderate inverse correlations between functional variables like the Berg Scale and oxygen pulse saturation (r=-0.401, p=0.01).
Why the study?
It was hypothesized that hemodynamic responses in chronic stroke patients could be affected by motor, cognitive, and cardiorespiratory deficits during aerobic exercise.
Observational (n=40)
In individuals with chronic stroke, hemodynamic and respiratory responses during aerobic exercise correlate moderately with balance, muscle strength, injury time, age, and lesion side, though patients can safely return to resting states post-exercise.
Correlations between function and exercise hemodynamics in chronic stroke are hypothesis-generating; should not yet change practice.
Background: Individuals post-stroke commonly presents functional and cardiorespiratory deficits besides a physical inactivity lifestyle in the chronic phase of disease. Considering this, there is a hypothesis that hemodynamic responses could be affected by motor, cognitive and cardiorespiratory deficits during the aerobic exercise. In order to identify functional conditions that can influence the aerobic performance of these individuals, correlations between functional variables and hemodynamic responses during and after the aerobic exercise were studied. As a secondary purpose, the ability of return to hemodynamic resting state were also analyzed. Methods: In this experimental study, after being evaluated about their motor and cognitive function, balance and prognosis, forty participants underwent a 30-minute aerobic exercise session on a treadmill. Training heart rate, arterial blood pressure, oxygen pulse saturation, heart rate, and respiratory rate were measured before begin the exercise session, every five minutes during the exercise and five minutes after it. Results: Cardiorespiratory parameters within normality limits in all phases of the exercise and the capacity of returning to the resting state were observed. Moderate inverse correlations were found between Berg Scale and oxygen pulse saturation (r=-0.401, p=0.01), between MMSE and diastolic blood pressure (r=-0.406, p=0.009), age and diastolic blood pressure (r=-0.435, p=0.005) and between injury time and RR (r=-0.454, p=0.003). Relationship between the lesion side and the 20 minute phase of aerobic exercise was also observed (p=0.042). Conclusion: Post- stroke individuals present moderate correlation between hemodynamic and respiratory responses during aerobic exercise and balance, muscle strength, injury time, age and side of lesion. They also have the capacity to return to their cardiorespiratory and cardiovascular resting state right after the activity besides their cardiorespiratory deficits.
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Carmo et al. (2021) conducted an observational in chronic stroke (n=40). 30-minute aerobic exercise session on a treadmill was evaluated on Correlations between functional variables and hemodynamic responses during and after aerobic exercise. During a 30-minute aerobic exercise session, chronic stroke patients showed moderate inverse correlations between functional variables like the Berg Scale and oxygen pulse saturation (r=-0.401, p=0.01).
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