HR was monitored throughout the entire YoYoIE2, by an individual RS800CX heart monitor (Polar Electro®, Kempele, Finland). After the YoYoIE2, the player indicated (individually to prevent influence from other player) a score for his RPE via CR-10 Borg scale in order to determine the subjective intensity of the session. This scale ranges from 0 to 10, where 0 is “nothing at all” and 10 is “very very hard (maximal)” (Borg & Kaijser, 2006 (link)). Blood samples (25 µL) were collected from the fingertip 4 min post YoYoIE2 using a lancet, and the lactate concentration was measured via a valid (Fell et al., 1998 (link)) portable lactate analyzer (Accutrend® Plus system, ROCHE, Basel Switzerland).
Rs800cx heart monitor
Manufactured by Polar Electro
Sourced in Finland
The RS800CX heart monitor is a device designed to measure and record heart rate data. It is a wearable device that uses electrodes to detect the electrical activity of the heart and provides accurate heart rate measurements.
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Lab products found in correlation
2 protocols using rs800cx heart monitor
1
Subjective and Physiological Intensity Assessment
2
Assessing Cardiac Autonomic Function using HRV
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A Polar RS800cx heart monitor (Polar Electro Oy, Kempele, Finland) was used to assess heart rate variability (HRV) as a measure of cardiac autonomic function. Participants completed a supine 5 min rest recording. The R–R interval tachogram was analyzed with Kubios HRV software (V.2.1, Kuopio, 2012). Ectopic beats were removed using linear interpolation of previous and subsequent beats. Time and frequency domain parameters were assessed. Time domain measured included the SD of the N–N interval (SDNN) and the root mean square of the R–R intervals (RMS-SD). Frequency domain measures were divided by spectral power analysis into high (0.15–0.40 Hz), low (0.04–0.15 Hz), and very low-frequency (0.00–0.04 Hz) powers with total power calculated as the sum of all powers.20 (link) Variables were left continuous due to a lack of cut-off values established to indicate pathology.
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