Banca de DEFESA: LUIZ FELIPE DA SILVA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : LUIZ FELIPE DA SILVA
DATE: 11/08/2022
TIME: 08:30
LOCAL: DEF
TITLE:

PREDICTIVE PERFORMANCE EQUATIONS FOR DIFFERENT DISTANCES IN INDOOR ROWING FOR JUNIOR CATEGORY ROWERS

KEY WORDS:

Athletic performance; Rowing; Sport; Puberty; Mathematical model.

PAGES: 84
BIG AREA: Ciências da Saúde
AREA: Educação Física
SUMMARY:

           

          The 2,000 m and 6,000 m Time Trial tests are the most used in Olympic Rowing, which mainly aims to estimate the Aerobic Fitness of a rower. However, many athletes perform the tests without a previous parameter, such as running pace, previously planned partials and applied power, which contributes to an evaluation without a previous strategy, which may compromise the final result. Therefore, it is necessary to predict the athletes' performance in order to plan test execution strategies at official distances. Given the above, the objective of the present study was to develop mathematical models capable of predicting the performance of the 2,000m and 6,000m test from maximum stimuli of 100m and 500m, respectively, performed by young rowers. on an indoor rowing ergometer (EIR). The study was cross-sectional with a sample composed of 12 male rowing athletes aged between 14 and 16 years in the Junior category. In a second step, a cross-validation was carried out with data from 129 subjects who competed in the national stages to estimate the performance of 6,000 m. Data from 129 subjects were included, totaling a sample of 141 rowers. We then numbered the subjects in the database (from 1 to 141) and randomized a sample into the development (~70%) and cross-validation (~30%) groups of the mathematical model through an online tool. Somatic development indicators were analyzed by anthropometric parameters and morphology was verified by dual energy X-ray emission absorptiometry (DXA) for characterization of the initial sample (12 athletes). After a 24 hour break, start modality-specific testing. On the first specific day, athletes test a 100-minute time trial and, after a 30-minute break, a 500-minute time trial. Subsequently, a 24-hour wash-out was performed, followed by a 2,000 m time trial. Then, another 24-h wash-out was given, followed by a 6,000-m time trial. All time trial tests were performed on an indoor rowing ergometer. The mathematical model to predict the performance of 2000-m from the maximum stimulus of 100-m showed correlation (r = 0.734; p= 0.006), reliability index (ICC: 0.753; p=0.001) and significant limits of agreement (Bland -Altman Agreement: -2; +2; 95% CI [-4] - [+4]). The mathematical model to estimate the 6,000-m performance showed correlation (r=0.840; β = 13.6; p= 0.001), reliability (CCI= 0.747; p=0.005), concordance correlation coefficient (CCC= 0.888; p= 0.005) and The concordance analyzes performed by the Bland-Altman graph point to an adequate concordance between the mathematical model developed by the present study and indoor rowing (95% CI -2.7; 2.7). Similar results were observed for the mathematical model cross-validation group (95% CI -4.0; 3.5). In addition, there were no significant biases in the propensity score for any of the groups (r²<0.03; p>0.05). It is concluded that the prediction of the performance of 2000-m and 6000-m, from mathematical models that use the performance of 100-m and 500-m respectively, proves to be reliable, effective and statistically significant.

COMMITTEE MEMBERS:
Presidente - 2627140 - BRENO GUILHERME DE ARAUJO TINOCO CABRAL
Interno - 1793257 - ARNALDO LUIS MORTATTI
Interno - 2626634 - PAULO MOREIRA SILVA DANTAS
Externo à Instituição - BIANCA MIARKA - UFRJ
Externo à Instituição - FELIPE JOSÉ AIDAR MARTINS - UFS