Cardiorespiratory Optimal Point application in cardiopulmonary assessment in effort of individuals with spinal cord injury
DOI:
https://doi.org/10.33233/rbfex.v21i2.5068Keywords:
disabled persons; oxygen consumption; exerciseAbstract
Introduction: Spinal Cord Injury (SCI) is related to low cardiorespiratory fitness and increased cardiovascular morbidity and mortality. In individuals with SCI, the assessment of cardiorespiratory capacity, whose best variable for analysis is maximal oxygen consumption (VO2max), is commonly impaired due to early interruption of effort. Consequently, measurements obtained at submaximal intensities are necessary, such as the cardiorespiratory optimal point (POC). Objective: To describe and compare the cardiorespiratory fitness in exertion of individuals with high, low and no LM. Methods: Cross-sectional study in participants with incomplete high LM, complete low LM and without LM, performed with progressive tests on a cycle ergometer for upper limbs, considering peak exercise, ventilatory threshold 1 (LV1) and POC. Results: Individuals with SCI had lower exercise tolerance and lower peak VO2 compared to individuals without SCI, despite the fact that all groups reached the end of the exercise equally with a greater contribution of anaerobic metabolism in energy production. As for the analysis of submaximal exertion intensities, individuals with quadriplegia, among the three groups, reached maximum ventilatory efficiency (POC) at higher percentages of peak VO2. Conclusion: Individuals with SCI have lower cardiorespiratory fitness at peak and submaximal exertion intensities when compared to individuals without SCI. Particularly in relation to POC, the higher the level of LM, the greater the ventilatory need to meet the metabolic demands of exercise.
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