The aim of the present study was to investigate the agreement in heart rate
variability domain methods of the ELITE HRV mobile app together with the Polar®
heart monitor (V800) + Kubius HRV 3.3.1 software, both associated with a chest strap
(H10). Participated in the study 40 individuals, 23 males and 17 females, with a mean
age of 24 ± 5 years, height 1.7 ± 0.03 meters, body mass 60 ± 10 kilograms and BMI
19 ± 2. This study is characterized as quantitative and applied in a transversal way.
For data collection, this research had only one meeting, where the study subjects were
instructed to remain in a stabilized sitting position for about five minutes to perform the
measurement on the instruments, that is, five minutes using the cardiac transmitter
(H10) with tracking and data storage via Polar® heart monitor (V800) and then the
same equivalent period for the ELITE HRV app. From this, the following variables were
collected: SDNN (standard deviation between normal to normal intervals) and RMSSD
(the square root of the mean differences of successive NN intervals). To carry out the
analysis, two statistical coefficients were selected, Person's correlation and the
intraclass correlation intended for intra-instrument evaluations. In conclusion, when
compared with a valid measure such as the Polar® heart monitor (V800), the APP Elite
HRV presented excellent and moderate agreement values for the analyzed variables
(RMSSD and SDNN) which may encourage the recommendation to use this
associated instrument with other validated parameters.
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