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• W3190364071 abstract "Purpose Obese individuals have reduced performance in cardiopulmonary exercise testing (CPET), mainly considering peak values of variables such as oxygen uptake ( <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline id=M1><mml:mover accent=true><mml:mrow><mml:mi>V</mml:mi></mml:mrow><mml:mo>˙</mml:mo></mml:mover><mml:msub><mml:mi mathvariant=normal>O</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math> ), carbon dioxide production ( <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline id=M2><mml:mover accent=true><mml:mrow><mml:mi>V</mml:mi></mml:mrow><mml:mo>˙</mml:mo></mml:mover><mml:mi mathvariant=normal>C</mml:mi><mml:msub><mml:mi mathvariant=normal>O</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math> ), tidal volume (Vt), minute ventilation ( <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline id=M3><mml:mover accent=true><mml:mrow><mml:mi>V</mml:mi></mml:mrow><mml:mo>˙</mml:mo></mml:mover><mml:mi mathvariant=normal>E</mml:mi></mml:math> ) and heart rate (HR). The CPET interpretation and prognostic value can be improved through submaximal ratios analysis of key variables like <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline id=M4><mml:mi mathvariant=normal>ΔHR</mml:mi><mml:mo>/</mml:mo><mml:mi mathvariant=normal>Δ</mml:mi><mml:mover accent=true><mml:mrow><mml:mi>V</mml:mi></mml:mrow><mml:mo>˙</mml:mo></mml:mover><mml:msub><mml:mi mathvariant=normal>O</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math> , <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline id=M5><mml:mi mathvariant=normal>Δ</mml:mi><mml:mover accent=true><mml:mrow><mml:mi>V</mml:mi></mml:mrow><mml:mo>˙</mml:mo></mml:mover><mml:mi mathvariant=normal>E</mml:mi><mml:mo>/</mml:mo><mml:mi mathvariant=normal>Δ</mml:mi><mml:mover accent=true><mml:mrow><mml:mi>V</mml:mi></mml:mrow><mml:mo>˙</mml:mo></mml:mover><mml:mi mathvariant=normal>C</mml:mi><mml:msub><mml:mi mathvariant=normal>O</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math> , <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline id=M6><mml:mi mathvariant=normal>Δ</mml:mi><mml:mover accent=true><mml:mrow><mml:mi>V</mml:mi></mml:mrow><mml:mo>˙</mml:mo></mml:mover><mml:mi mathvariant=normal>C</mml:mi><mml:mo>/</mml:mo><mml:mi mathvariant=normal>Δ</mml:mi><mml:mi mathvariant=normal>linearized</mml:mi></mml:math> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline id=M7><mml:mo>(</mml:mo><mml:mi mathvariant=normal>ln</mml:mi><mml:mo>)</mml:mo><mml:mover accent=true><mml:mrow><mml:mi>V</mml:mi></mml:mrow><mml:mo>˙</mml:mo></mml:mover><mml:mi mathvariant=normal>E</mml:mi></mml:math> and oxygen uptake efficiency slope (OUES). The obesity influence on these responses has not yet been investigated. Our purpose was to evaluate the influence of adulthood obesity on maximal and submaximal physiological responses during CPET, emphasizing the analysis of submaximal dynamic variables. Methods We analyzed 1,594 CPETs of adults (755 obese participants, Body Mass Index ≥ 30 kg/m 2 ) and compared the obtained variables among non-obese (normal weight and overweight) and obese groups (obesity classes I, II and III) through multivariate covariance analyses. Result Obesity influenced the majority of evaluated maximal and submaximal responses with worsened CPET performance. Cardiovascular, metabolic and gas exchange variables were the most influenced by obesity. Other maximal and submaximal responses were altered only in morbidly obese. Only a few cardiovascular and ventilatory variables presented inconsistent results. Additionally, Vt max , <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline id=M8><mml:mi mathvariant=normal>Vt</mml:mi><mml:mo>/</mml:mo><mml:mover accent=true><mml:mrow><mml:mi>V</mml:mi></mml:mrow><mml:mo>˙</mml:mo></mml:mover><mml:mi mathvariant=normal>E</mml:mi></mml:math> , Vt/Inspiratory Capacity, Vt/Forced Vital Capacity, Lowest <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline id=M9><mml:mover accent=true><mml:mrow><mml:mi>V</mml:mi></mml:mrow><mml:mo>˙</mml:mo></mml:mover><mml:mi mathvariant=normal>E</mml:mi><mml:mo>/</mml:mo><mml:mover accent=true><mml:mrow><mml:mi>V</mml:mi></mml:mrow><mml:mo>˙</mml:mo></mml:mover><mml:mi mathvariant=normal>C</mml:mi><mml:msub><mml:mi mathvariant=normal>O</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math> , <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline id=M10><mml:mi mathvariant=normal>Δ</mml:mi><mml:mover accent=true><mml:mrow><mml:mi>V</mml:mi></mml:mrow><mml:mo>˙</mml:mo></mml:mover><mml:mi mathvariant=normal>E</mml:mi><mml:mo>/</mml:mo><mml:mi mathvariant=normal>Δ</mml:mi><mml:mover accent=true><mml:mrow><mml:mi>V</mml:mi></mml:mrow><mml:mo>˙</mml:mo></mml:mover><mml:mi mathvariant=normal>C</mml:mi><mml:msub><mml:mi mathvariant=normal>O</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math> , and the y-intercepts of <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline id=M11><mml:mover accent=true><mml:mrow><mml:mi>V</mml:mi></mml:mrow><mml:mo>˙</mml:mo></mml:mover><mml:mi mathvariant=normal>E</mml:mi><mml:mo>/</mml:mo><mml:mover accent=true><mml:mrow><mml:mi>V</mml:mi></mml:mrow><mml:mo>˙</mml:mo></mml:mover><mml:mi mathvariant=normal>C</mml:mi><mml:msub><mml:mi mathvariant=normal>O</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math> did not significantly differ regardless of obesity. Conclusion Obesity expressively influences the majority of CPET variables. However, the prognostic values of the main ventilatory efficiency responses remain unchanged. These dynamic responses are not dependent on maximum effort and may be useful in detecting incipient ventilatory disorder. Our results present great practical applicability in identifying exercise limitation, regardless of overweight and obesity." @default.
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• W3190364071 date "2021-08-09" @default.
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• W3190364071 title "Dynamic physiological responses in obese and non-obese adults submitted to cardiopulmonary exercise test" @default.
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