The Fuzzy Kinetics Index: an indicator conflating cardiorespiratory kinetics during dynamic exercise
| Autor: | Uwe Drescher |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Physics
Physiology Kinetics Public Health Environmental and Occupational Health Time series analysis General Medicine Human physiology Sport performance Oxygen uptake Combinatorics Circulation Pseudo random binary sequence (PRBS) Exercise tolerance Physiology (medical) Exercise performance Gas exchange Cycle ergometer Orthopedics and Sports Medicine Original Article Connection (algebraic framework) |
| Zdroj: | European Journal of Applied Physiology |
| ISSN: | 1439-6327 1439-6319 |
| Popis: | Purpose The aim of the present study was to develop a novel index using fuzzy logic procedures conflating cardiorespiratory and pulmonary kinetics during dynamic exercise as a representative indicator for exercise tolerance. Methods Overall 69 data sets were re-analyzed: (age: 29 ± 1.2 y [mean ± SEM], height: 179 ± 1.0 cm; body mass: 78 ± 1.4 kg; peak oxygen uptake ($$\dot {\text{V}}$$ V ˙ ̇O2peak): 48 ± 1.1 ml·min−1·kg−1), that comprised pseudo random binary sequence work rate (WR) changes between 30 and 80 W on a cycle ergometer, with additional voluntary exhaustion to estimate $$\dot {\text{V}}$$ V ˙ O2peak. Heart rate (HR), stroke volume (SV) and gas exchange (pulmonary oxygen uptake ($$\dot {\text{V}}$$ V ˙ O2pulm)) were measured beat-to-beat and breath-by-breath, respectively. For estimation of muscle oxygen uptake ($$\dot {\text{V}}$$ V ˙ O2musc) kinetics and for the analysis of kinetic responses of the parameters of interest (perfusion ($$\dot {\text{Q}}$$ Q ˙ = HR·SV), $$\dot {\text{V}}$$ V ˙ O2pulm, $$\dot {\text{V}}$$ V ˙ O2musc) the approach of Hoffmann et al. (2013) was applied. For calculation of the Fuzzy Kinetics Index $$\dot {\text{Q}}$$ Q ˙ , $$\dot {\text{V}}$$ V ˙ O2pulm, and $$\dot {\text{V}}$$ V ˙ O2musc were used as input variables for the subsequent fuzzy- and defuzzyfication procedures. Results For both absolute and relative $$\dot {\text{V}}$$ V ˙ O2peak a significant correlation has been observed with FKI, whereas the correlation coefficient is higher for relative (r = 0.430; p $$\dot {\text{V}}$$ V ˙ O2peak (r = 0.358; p 0.05 each). Conclusions The significant correlations between FKI and $$\dot {\text{V}}$$ V ˙ O2peak represent a physiological connection between the regulatory and the capacitive system and its exercise performance. In turn, the application of FKI can serve as an indicator for healthy participants to assess exercise tolerance and sport performance. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink