Percorrer por autor "Correia, Ricardo de Assis"
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- Is V̇O2peak a valid estimation of V̇O2max in swimmers with physical impairments?Publication . Feitosa, Wellington G.; Barbosa, Tiago M.; Correia, Ricardo de Assis; Castro, Flávio A. de SouzaPeak and maximal oxygen uptake (V_O2peak and V_O2max, respectively) are used in assessing aerobic power. For swimmers with physical impairments, it is unclear whether the physiological variables obtained in 200-m and Nx200-m tests are similar. The objective of this study is to assess the validity of V_O2peak as an estimator of V_O2max and complementary physiological variables, in particular, carbon dioxide production (V_ CO2), respiratory exchange ratio (RER), minute-ventilation (V_ EÞ and absolute (HR) and relative (%HRmax) heart rates—which were obtained in a time trial test (200- m) and an incremental intermittent test (Nx200-m) performed by swimmers with physical impairments. Methods: Eleven well-trained swimmers with physical impairments performed 200-m all-out and Nx200-m from low to all-out (controlled by a visual pacer), both with a respiratory valve system and a portable gas analyzer. Results: A paired Student’s t-test showed no statistical difference (p > .05) for all comparisons. The intraclass correlation coefficient (ICC) was 0.97 and 0.98 for V_O2 in l/min and ml/kg/min, respectively; ICC = 0.75 to 0.9 for V_ CO2 (l/min and ml/kg/min), V_ E (in l/min) and HR (beats/min); ICC = 0.5 and 0.75 for %HRmax; and ICC < 0.5 for RER. Passing-Bablok regression showed that the dispersions were acceptable, considering the proportionality, except for HR and % HRmax. Bland-Altman method showed a high level of agreement for all variables. Conclusions: The _VO2peak and _VO2max, as well as the physiological variables _VCO2 and HR obtained, respectively, by 200-m and Nx200-m tests in swimmers with physical impairment were not different.
- Kinematic, coordinative and efficiency parameters of physically impaired swimmers at maximum aerobic power speedPublication . Feitosa, Wellington G.; Correia, Ricardo de Assis; Barbosa, Tiago M.; Castro, Flávio A. de SouzaIn paralympic swimming, the biomechanical parameters related to performance are effectively determined according to the potentialities and peculiarities of each athlete. However, a clear integrated approach to these parameters for swimmers with physical disabilities at the speed of maximum oxygen uptake (vV̇O2max) is still practically non-existent.
- Maximal oxygen uptake, total metabolic energy expenditure, and energy cost in swimmers with physical disabilitiesPublication . Feitosa, Wellington G.; Barbosa, Tiago M.; Correia, Ricardo de Assis; Castro, Flávio A. de SouzaThe purpose of this study was to assess the maximum oxygen uptake (V̇ O2max), the total metabolic energy expenditure (_Etot), and the energy cost (C) measured as the speed of V̇ O2max in swimmers with physical impairments. Eleven swimmers performed an Nx200- m front crawl test from a low to all-out speed and data were obtained at maximum aerobic power. The oxygen uptake was measured breath-by-breath by a telemetric gas exchange system. The _Etot was calculated from the aerobic and anaerobic pathways at maximal intensity. The C was obtained by the ratio of the _Etot and the mean swimming speed. The V̇ O2max was 38.2 ± 8.3 mL.kg. min−1, the _E tot was 191.9 ± 51.7 kJ, and the C was 0.8 ± 0.2 kJ.m−1. The energy contribution of the aerobic pathway was higher (p < 0.001) than that of both the anaerobic pathways, which were similar (p > 0.05). There was no gender effect on the results of the energy contributions (p > 0.05). The anaerobic lactic pathway contribution was higher in male than in female swimmers (p < 0.05). The V̇ O2max and C were higher in swimmers who were less affected by physical impairment. The energy contribution of the aerobic pathways was similar for males and females.
- Performance of disabled swimmers in protocols or tests and competitions: a systematic review and meta-analysisPublication . Feitosa, Wellington G.; Correia, Ricardo de Assis; Barbosa, Tiago M.; Castro, Flávio A. de SouzaBiomechanical and coordination measurements are useful tools to assess swimming performance. Regarding Paralympic swimming, function and technique make these measurements complex. The aim of this study was to perform a systematic review of studies on biomechanics, coordination and performance in disabled swimmers following swimming protocols and in competitions. Data sources: PubMed, EMBASE, ISI Web of Knowledge, SPORTDiscus and Academic Search Premier. We selected complete studies, published until June 2018. Eighteen studies satisfied the inclusion criteria and were selected for qualitative analysis; nine of these were included in the meta-analysis. Swimming speed and stroke length increase with less impact of physical, visual and intellectual impairment on performing specific swimming tasks. Stroke rate is more stable all through the sport classes than both swimming speed and stroke length. Most physically disabled swimmers adopt the catch-up coordination model. Stroke rate is responsible for most of the intracycle velocity variation in swimmers with amputations or malformations of the upper limbs. No study was found on propulsive efficiency. Swimmers with disabilities should work more on stroke rate, with small decreases in stroke length to achieve higher swimming speeds, lower swim coordination index (more negative) and lower speed variations.
- Swimming speed in men’s 100-m freestyle confirms the fairness of the Paralympic Classification System: a meta-analysisPublication . Feitosa, Wellington G.; Correia, Ricardo de Assis; Barbosa, Tiago M.; Castro, Flávio A. de SouzaDespite an increase in popularity ofParalympiesports, there isa lackofstudies on these sportsj and eontroversies regarding the classification system forParalyrnpian swimmers. The Paralympic c1assification systerrt features 10 classes toprovide fair eompetition for swimmers with a physical disability, The summary of the clean swimming speed (SS) eao provide useful information for the c1assification system in competitive swimmiJig. The aim ofthis study wasto surnmarize evidenee of the fairness of Paralympic categories of male swimmers witha physically disability~ focusing 00 SS in the lOO-rtl fiont crawL Multiple databases (PubMed, EMBASE, IS! Web ofKnowledge, SPORTDiseus, Academic Search Premier; CINAHL) Were examined for observational studies published until October2017, 00 official swimming taces. Five studies \Vere fOUild and analyzed (n = 369; national and internationallevel). The random effectsmodel was used for this meta-analysis.
- Swimming speed in men’s 100-m freestyle confirms the fairness of the Paralympic Classification System: a meta-analysisPublication . Feitosa, Wellington G.; Correia, Ricardo de Assis; Barbosa, Tiago M.; Castro, Flávio A. de SouzaDespite an increase in popularity of Paralympic sports, there is a lack of studies on these sports, and controversies regarding the classification system for Paralympian swimmers. The Paralympic classification system features 10 classes to provide fair competition for swimmers with a physical disability. The summary of the clean swimming speed (SS) can provide useful information for the classification system in competitive swimming. The aim of this study was to summarize evidence of the fairness of Paralympic categories of male swimmers with a physically disability, focusing on SS in the 100-m front crawl. Multiple databases (PubMed, EMBASE, ISIWeb of Knowledge, SPORTDiscus, Academic Search Premier, CINAHL) were examined for observational studies published until October 2017, on official swimming races. Five studies were found and analyzed (n = 369; national and international level). The random effects model was used for this meta-analysis. Statistical heterogeneity among the studies was assessed by the inconsistency test (I2) and alfa = 0.05. Subgroup analyses were performed with addition of the “class” covariant according to the characteristics of the studies. Bias was analyzed with a forest plot on the OpenMeta[Analyst] software. Increases in SS were related to higher Paralympic classes. Pooling data from all studies and classes, the estimated mean of SS was 1.25 m.s-1, SD = 0.05 m.s-1, p < 0.01, I2 = 99%, p < 0.01. The analysis of sub-groups found high heterogeneity (I2 > 75%, p < 0.05). The results suggest that the Paralympic Classification System seems to be fair for the men’s 100-m freestyle events. Assessment of studies by close classes and by groups with many classes together, e.g. S1 ‒ S10, increased the heterogeneity of the analysis. However, further studies are necessary to explain possible inconsistencies in the Paralympic Classification.