International Journal of Sports Medicine: Progress and Innovation in Cycling Science 2001 - 2007

Atkinson, Greg

doi:10.1055/s-2007-965723

Int J Sports Med

2007

DOI: 10.1055/s-2007-965723

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International Journal of Sports Medicine: Progress and Innovation in Cycling Science 2001 - 2007

Greg Atkinson¹

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Cardiovascular and Autonomic Responses to a Maximal Exercise Test in Elite Youngsters

2017

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To analyze cardiovascular and autonomic responses in elite youngsters, 13 male cyclists (15.43±0.51 years) performed a graded-test until voluntary exhaustion. Oxygen consumption (VO), blood lactate (BLa), arterial oxygen saturation (SaO), respiratory exchange ratio (RER) and rating of perceived exertion (RPE) were collected, while heart rate (HR) was registered for heart rate variability (HRV) analyses, looking for linear and nonlinear comparisons. Cyclists reached maximal exertion [RPE: 19.14±0.94; BLa: 8.92±2.51 mmol.L; RER: 1.04±0.03; SaO: 92.43±2.5%] and high-level performance (4.41±0.46 W·Kg; 60.77±6.87 ml·Kg·min) once over 95% of age-predicted HR. VO and RPE increased, and RR intervals (RRi) decreased (p<0.005), whereas only the short-term scaling exponent of the Detrended Fluctuation Analysis technique (DFA1) displayed similar adaptive changes regarding intensity (p=0.011). After controlling for W·Kg and RRi, DFA1 (0.260±0.084) showed large-negative correlations with VO (r=-0.83; p<0.05) and RPE (r=-0.79; p<0.05), suggesting a strong association between the reduction in self-similar properties of the cardiac signal and the capacity to elicit at maximum in youths. Overall-HRV (lnRMSSD) and short-term variability (lnSD1) did not show any association at maximum, or significant differences regarding intensity. DFA1 might reflect ANS-CNS linkage related to cardiac respiratory controls through exercise, becoming a complementary criterion for VO testing in youths.

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Cardiovascular and Autonomic Responses to a Maximal Exercise Test in Elite Youngsters

2017

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International Journal of Sports Medicine: Progress and Innovation in Cycling Science 2001 - 2007

Cited by 1 publication

References 24 publications

Cardiovascular and Autonomic Responses to a Maximal Exercise Test in Elite Youngsters

Cardiovascular and Autonomic Responses to a Maximal Exercise Test in Elite Youngsters

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