Reality and Virtual: Hemodynamic Variables and Rating of Perceived Exertion Between Dance Sessions and Active Videogame Just Dance in Women.

Objective: To analyze the hemodynamic variables and the rating of perceived exertion (RPE) between an active videogame (AVG) session and a dance session. Materials and Methods: The sample consisted of 30 university women between 18 and 30 years of age, physically active and having some kind of experience with dancing. The volunteers participated in the two sessions held on different days, the first with an active dance videogame and the other with a dance instructor, both lasting 50 minutes, with a sequence of songs and moderate intensity. For the evaluation of the two sessions, heart rate (HR), blood pressure (BP), and RPE measurements were taken before and every 10 minutes, until the time for each modality (AVG or dance) was completed. The Shapiro-Wilk and Levene test were used for normal data. For the comparison of two sessions, the two-way ANOVA test was used for repeated measures, and were considered to have a significance level of P < 0.05. Results: There were significant differences in HR [F(6, 96) = 2.606, P = 0.02, η2 P = 0.140], from 10 to 50 minutes (P < 0.01), and diastolic BP [F(6, 84) = 1.858, P = 0.10, η2 P = 0.117], as well as, in the 20th minute (P = 0.02) between Just Dance 2016® and a dance session. All the variables analyzed showed an effect size as large in the classification of the degree of magnitude. Conclusion: There are similarities between the virtual and real dance sessions regarding hemodynamic variables and RPE. Thus, AVGs, especially Just Dance®, may be a favorable option for individuals who wish to exercise at home.

Reproducibility of an aerobic endurance test for nonexpert swimmers.

BACKGROUND: This study aimed to verify the reproduction of an aerobic test to determine nonexpert swimmers' resistance. METHODS: The sample consisted of 24 male swimmers (age: 22.79 ± 3.90 years; weight: 74.72 ± 11.44 kg; height: 172.58 ± 4.99 cm; and fat percentage: 15.19% ± 3.21%), who swim for 1 hour three times a week. A new instrument was used in this study (a Progressive Swim Test): the swimmer wore an underwater MP3 player and increased their swimming speed on hearing a beep after every 25 meters. Each swimmer's heart rate was recorded before the test (BHR) and again after the test (AHR). The rate of perceived exertion (RPE) and the number of laps performed (NLP) were also recorded. The sample size was estimated using G*Power software (v 3.0.10; Franz Faul, Kiel University, Kiel, Germany). The descriptive values were expressed as mean and standard deviation. After confirming the normality of the data using both the Shapiro-Wilk and Levene tests, a paired t-test was performed to compare the data. The Pearson's linear correlation (r) and intraclass coefficient correlation (ICC) tests were used to determine relative reproducibility. The standard error of measurement (SEM) and the coefficient of variation (CV) were used to determine absolute reproducibility. The limits of agreement and the bias of the absolute and relative values between days were determined by Bland-Altman plots. All values had a significance level of P < 0.05. RESULTS: There were significant differences in AHR (P = 0.03) and NLP (P = 0.01) between the 2 days of testing. The obtained values were r > 0.50 and ICC > 0.66. The SEM had a variation of ±2% and the CV was <10%. Most cases were within the upper and lower limits of Bland-Altman plots, suggesting correlation of the results. The applicability of NLP showed greater robustness (r and ICC > 0.90; SEM < 1%; CV < 3%), indicating that the other variables can be used to predict incremental changes in the physiological condition of swimmers. CONCLUSION: The Progressive Swim Test for nonexpert swimmers produces comparable results for noncompetitive swimmers with a favorable degree of reproducibility, thus presenting possible applications for researching the physiological performance of nonexpert swimmers.