Correlation and Agreement of FIT Score from Frequency – Intensity – Time Index of Kasari with the Maximum Oxygen Intake

• Autor(a) principal: Iahnke, Vinícius Jacondino
• Data de Publicação: 2020
• Outros Autores: Silva, Aline Tito Brabosa, Neves, Angela Nogueira
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista de Educação Física
• Texto Completo: https://revistadeeducacaofisica.emnuvens.com.br/revista/article/view/862
• topic: Aptidão física; condicionamento físico aeróbio; informações autorreportadas.

Introduction: The Frequency-Intensity-Time Index of Kasari evaluates physical activity practice in terms of frequency, intensity, and length, being the product of these parameters (FIT) interpret as an indicator of aerobic fitness. Objective: To evaluate the correlation and agreement of (FIT) with maximum oxygen intake (VO2max) in direct and indirect measures.Methods: Methodological study, with non-probabilistic sampling, by convenience, in which students from the Physical Education Instructors (CI) course and members of the military family participated (n = 59). The sample was divided into two VO2max estimation groups: ramp protocol, using an expirometer (VO2maxramp), applied to the military family; and Cooper's test (VO2maxCooper), applied to students. They all answered the same version of FIT. The correlation was estimated using the Pearson correlation coefficient and the agreement was assessed using the agreement coefficient (ρc) and the graphic analysis by Bland and Altman. The SPSS 15 and MedCalc software were used. Results: The sample was composed by 24 students from CI (26,5 ± 2,39 years old) and 35 members of military family (45,28 ± 10,79 years old). A weak and significant correlation between FIT and VO2maxCooper was found. The agreement coefficient was week and despicable among FIT and VO2maxCooper and VO2maxRamp, respectively. The Bland-Altman graphs showed a large difference bias, which constitutes wide margins of underestimation and overestimation of VO2max. Conclusion: The Frequency-Intensity-Time Index of Kasari seems to be adequate to describe physical exercise, but the FIT use requires further investigation.