Comparison of <scp>P</scp>olar®<scp>RS</scp>800G3™ heart rate monitor with <scp>P</scp>olar® S810i™ and electrocardiogram to obtain the series of <scp>RR</scp> intervals and analysis of heart rate variability at rest

Barbosa, Marianne Penachini da Costa de Rezende; Silva, Natália Turri da; Azevedo, Fábio Mícolis de; Pastre, Carlos Marcelo; Vanderlei, Luiz Carlos Marques

doi:10.1111/cpf.12203

Cited by 115 publications

(73 citation statements)

References 13 publications

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“…The HRV analysis was registered during the whole experimental protocol by an HR receiver (Polar RS800CX, Finland), the equipment previously used to record the pulse rate of HR 16 . The HRV indices were determined at the following times: 10 th to 15 th minute of rest and during recovery (Rec): Rec1 (0 to 5 minutes), Rec2 (5 to 10 minutes), Rec3 (15 to 20 minutes), Rec4 (25–30 minutes), Rec5 (35 to 40 minutes), Rec6 (45 to 50 minutes) and Rec7 (55 to 60 minutes).…”

Section: Methodsmentioning

confidence: 99%

Caffeine affects autonomic control of heart rate and blood pressure recovery after aerobic exercise in young adults: a crossover study

Gonzaga

Vanderlei

Gomes

et al. 2017

Sci Rep

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The post-exercise recovery period is associated with changes in autonomic modulation, which can promote an intercurrent-favorable environment. Caffeine has the ability to release catecholamines, but its effects after exercises is little explored. The present study aims to evaluate the acute effects of caffeine on the autonomic control and cardiorespiratory parameters after moderate intensity aerobic exercise. 32 young males (23,59 ± 3,45 years) were submitted to two protocols: Placebo and Caffeine, consisting of 15 minutes of rest, 30 minutes of exercise on a treadmill to 60% on VO2peak, followed by 60 minutes of recovery. Heart rate variability indices and cardiorespiratory parameters were determined at different times during the protocols. The RMSSD and SD1 indices recovered faster in placebo (p < 0.05). The systolic blood pressure differences were found from the 1st to the 5th minute of recovery with the caffeine protocol and from the 1st and 3rd minute with the placebo, whereas, for diastolic blood pressure, significant differences (p < 0.0001) were observed only for the caffeine protocol at the 1st and 3rd minutes of recovery. Caffeine was shown to be capable of delaying parasympathetic recovery but did not influence the behavior of the respiratory rate, oxygen saturation or frequency-domain HRV indices.

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Section: Methodsmentioning

confidence: 99%

Caffeine affects autonomic control of heart rate and blood pressure recovery after aerobic exercise in young adults: a crossover study

Gonzaga

Vanderlei

Gomes

et al. 2017

Sci Rep

Self Cite

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“…These devices represent a convenient alternative to traditional electrocardiographs, as far as heart rate variability is concerned (Rezende Barbosa et al 2014;Quintana et al 2012). It is comprised of a transmitter worn around the chest and a receiver worn on the non-dominant wrist that stores the HR values.…”

Section: Differential Heart Ratementioning

confidence: 99%

Effects of Cognitive Appraisal and Mental Workload Factors on Performance in an Arithmetic Task

Galy

Mélan

2015

Appl Psychophysiol Biofeedback

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We showed in a previous study an additive interaction between intrinsic and extraneous cognitive loads and of participants' alertness in an 1-back working memory task. The interaction between intrinsic and extraneous cognitive loads was only observed when participants' alertness was low (i.e. in the morning). As alertness is known to reflect an individual's general functional state, we suggested that the working memory capacity available for germane cognitive load depends on a participant's functional state, in addition to intrinsic and extraneous loads induced by the task and task conditions. The relationships between the different load types and their assessment by specific load measures gave rise to a modified cognitive load model. The aim of the present study was to complete the model by determining to what extent and at what processing level an individual's characteristics intervene in order to implement efficient strategies in a working memory task. Therefore, the study explored participants' cognitive appraisal of the situation in addition to the load factors considered previously-task difficulty, time pressure and alertness. Each participant performed a mental arithmetic task in four different cognitive load conditions (crossover of two task difficulty conditions and of two time pressure conditions), both while their alertness was low (9 a.m.) and high (4 p.m.). Results confirmed an additive effect of task difficulty and time pressure, previously reported in the 1-back memory task, thereby lending further support to the modified cognitive load model. Further, in the high intrinsic and extraneous load condition, performance was reduced on the morning session (i.e. when alertness was low) on one hand, and in those participants' having a threat appraisal of the situation on the other hand. When these factors were included into the analysis, a performance drop occurred in the morning irrespective of cognitive appraisal, and with threat appraisal in the afternoon (i.e. high alertness). Taken together, these findings indicate that mental overload can be the result of a combination of subject-related characteristics, including alertness and cognitive appraisal, in addition to well-documented task-related components (intrinsic and extraneous load). As the factors investigated in the study are known to be critically involved in a number of real job-activities, the findings suggest that solutions designed to reduce incidents and accidents at work should consider the situation from a global perspective, including individual characteristics, task parameters, and work organization, rather than dealing with each factor separately.

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“…Recently, their utilization in HRV-based studies (typically, in heart diagnostics) has also been reported (12,13,19,33). According to the results of comparison studies, top-level Polar watches (S810, S810i) can generally be considered as valid as traditional ECG in obtaining data for HR and HRV analysis (14,15,25,26,31,32,42,45), although limitations were also reported (25,45). In one study, however, the RS-800 system was found to be inferior compared to the traditional method (44).…”

Section: Discussionmentioning

confidence: 99%

Polar OwnIndex is not a reliable indicator of aerobic training status

Köteles¹,

Dömötör²,

Berkes³

et al. 2015

Acta Physiologica Hungarica

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Polar watches with heart rate monitoring function have become popular among recreational and professional athletes. In addition to monitoring functions, they calculate a specific index called OwnIndex which is claimed to measure aerobic training status. The current research attempted to shed light on the factors determining the OwnIndex. In Study 1, OwnIndex calculated by the RS-400 Polar watch was estimated using anthropometric (gender, age, height, weight), cardiovascular (resting HR, RMSSD), and exercise-related (maximal oxygen uptake, self-reported physical activity) data of 45 young adults. In Study 2, the OwnIndex was measured in 21 young adults twice, first with self-reported physical activity set to the lowest, then to the highest value. In the regression analysis (Study 1), the only significant predictor of OwnIndex was self-reported physical activity (R 2 = 0.883; β = 0.915, p < 0.001). A significant difference with a large effect size (t(20) = -16.657, p < 0.001, d = 3.635) and no significant correlation (r = -0.32; p = 0.155) were found between the OwnIndices calculated with different levels of activity in Study 2. As anthropometric and cardiac variables play a practically negligible role in the calculation of the OwnIndex, it cannot be considered an appropriate measure of aerobic fitness.Keywords: aerobic fitness, assessment, technology, exercise, placeboMonitoring of heart rate (HR) has become more and more popular among recreational as well as elite athletes in aerobic sports, particularly in cycling and running. Relying on this information, athletes are able to optimize their training load, and avoid cardiac overload. Although even modern mobile phones are able to receive and handle HR-related information, the primary platform for such tasks is a combination of a chest strap that functions as electrodes, a wireless transmitter attached to the strap, and a receiver unit, usually a special watch. The development of these devices started already in the 70s, and today several companies offer products that support the planning and monitoring of workouts. One of the leading companies is Polar Electro; its advanced watches are claimed not only to be able to monitor heart rate during exercise but also to characterize aerobic fitness (i.e., maximal oxygen uptake: VO 2 max) by a specific index called OwnIndex. The OwnIndex is calculated using a non-linear method, i.e., an artificial neural network (ANN) approximation from demographic and heart rate related variables. This latter component is not specified in more detail, i.e., the actual variables (e.g. heart rate, certain types of heart rate variability, HRV) used in the approximation are unknown. According to the reported results, the method was able to estimate the VO 2 max from a short R-R interval measurement with high correlation (0.96) and accuracy (39-41). In the current implementation of the method, the calculation of

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Comparison of Polar^®RS800G3^™ heart rate monitor with Polar^® S810i^™ and electrocardiogram to obtain the series of RR intervals and analysis of heart rate variability at rest

Cited by 115 publications

References 13 publications

Caffeine affects autonomic control of heart rate and blood pressure recovery after aerobic exercise in young adults: a crossover study

Caffeine affects autonomic control of heart rate and blood pressure recovery after aerobic exercise in young adults: a crossover study

Effects of Cognitive Appraisal and Mental Workload Factors on Performance in an Arithmetic Task

Polar OwnIndex is not a reliable indicator of aerobic training status

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Comparison of Polar®RS800G3™ heart rate monitor with Polar® S810i™ and electrocardiogram to obtain the series of RR intervals and analysis of heart rate variability at rest

Cited by 115 publications

References 13 publications

Caffeine affects autonomic control of heart rate and blood pressure recovery after aerobic exercise in young adults: a crossover study

Caffeine affects autonomic control of heart rate and blood pressure recovery after aerobic exercise in young adults: a crossover study

Effects of Cognitive Appraisal and Mental Workload Factors on Performance in an Arithmetic Task

Polar OwnIndex is not a reliable indicator of aerobic training status

Contact Info

Product

Resources

About

Comparison of Polar^®RS800G3^™ heart rate monitor with Polar^® S810i^™ and electrocardiogram to obtain the series of RR intervals and analysis of heart rate variability at rest