scholarly journals Usability of Wearable Devices With a Novel Cardiac Force Index for Estimating the Dynamic Cardiac Function: Observational Study

10.2196/15331 ◽  
2020 ◽  
Vol 8 (7) ◽  
pp. e15331 ◽  
Author(s):  
Po-Jen Hsiao ◽  
Chih-Chien Chiu ◽  
Ke-Hsin Lin ◽  
Fu-Kang Hu ◽  
Pei-Jan Tsai ◽  
...  
Keyword(s):  
Heart Rate ◽  
Waist Circumference ◽  
Cardiac Function ◽  
Prediction Model ◽  
Fold Increase ◽  
Physiological Parameters ◽  
Long Distance ◽  
Running Performance ◽  
Study Results ◽  
The Relationship

Background Long-distance running can be a form of stress to the heart. Technological improvements combined with the public’s gradual turn toward mobile health (mHealth), self-health, and exercise effectiveness have resulted in the widespread use of wearable exercise products. The monitoring of dynamic cardiac function changes during running and running performance should be further studied. Objective We investigated the relationship between dynamic cardiac function changes and finish time for 3000-meter runs. Using a wearable device based on a novel cardiac force index (CFI), we explored potential correlations among 3000-meter runners with stronger and weaker cardiac functions during running. Methods This study used the American product BioHarness 3.0 (Zephyr Technology Corporation), which can measure basic physiological parameters including heart rate, respiratory rate, temperature, maximum oxygen consumption, and activity. We investigated the correlations among new physiological parameters, including CFI = weight * activity / heart rate, cardiac force ratio (CFR) = CFI of running / CFI of walking, and finish times for 3000-meter runs. Results The results showed that waist circumference, smoking, and CFI were the significant factors for qualifying in the 3000-meter run. The prediction model was as follows: ln (3000 meters running performance pass probability / fail results probability) = –2.702 – 0.096 × [waist circumference] – 1.827 × [smoke] + 0.020 × [ACi7]. If smoking and the ACi7 were controlled, contestants with a larger waist circumference tended to fail the qualification based on the formula above. If waist circumference and ACi7 were controlled, smokers tended to fail more often than nonsmokers. Finally, we investigated a new calculation method for monitoring cardiac status during exercise that uses the CFI of walking for the runner as a reference to obtain the ratio between the cardiac force of exercise and that of walking (CFR) to provide a standard for determining if the heart is capable of exercise. A relationship is documented between the CFR and the performance of 3000-meter runs in a healthy 22-year-old person. During the running period, data are obtained while participant slowly runs 3000 meters, and the relationship between the CFR and time is plotted. The runner’s CFR varies with changes in activity. Since the runner’s acceleration increases, the CFR quickly increases to an explosive peak, indicating the runner’s explosive power. At this period, the CFI revealed a 3-fold increase (CFR=3) in a strong heart. After a time lapse, the CFR is approximately 2.5 during an endurance period until finishing the 3000-meter run. Similar correlation is found in a runner with a weak heart, with the CFR at the beginning period being 4 and approximately 2.5 thereafter. Conclusions In conclusion, the study results suggested that measuring the real-time CFR changes could be used in a prediction model for 3000-meter running performance.

scholarly journals Usability of Wearable Devices With a Novel Cardiac Force Index for Estimating the Dynamic Cardiac Function: Observational Study (Preprint)

2019 ◽  
Author(s):  
Po-Jen Hsiao ◽  
Chih-Chien Chiu ◽  
Ke-Hsin Lin ◽  
Fu-Kang Hu ◽  
Pei-Jan Tsai ◽  
...  
Keyword(s):  
Heart Rate ◽  
Waist Circumference ◽  
Cardiac Function ◽  
Prediction Model ◽  
Fold Increase ◽  
Physiological Parameters ◽  
Long Distance ◽  
Running Performance ◽  
Study Results ◽  
The Relationship

BACKGROUND Long-distance running can be a form of stress to the heart. Technological improvements combined with the public’s gradual turn toward mobile health (mHealth), self-health, and exercise effectiveness have resulted in the widespread use of wearable exercise products. The monitoring of dynamic cardiac function changes during running and running performance should be further studied. OBJECTIVE We investigated the relationship between dynamic cardiac function changes and finish time for 3000-meter runs. Using a wearable device based on a novel cardiac force index (CFI), we explored potential correlations among 3000-meter runners with stronger and weaker cardiac functions during running. METHODS This study used the American product BioHarness 3.0 (Zephyr Technology Corporation), which can measure basic physiological parameters including heart rate, respiratory rate, temperature, maximum oxygen consumption, and activity. We investigated the correlations among new physiological parameters, including CFI = weight * activity / heart rate, cardiac force ratio (CFR) = CFI of running / CFI of walking, and finish times for 3000-meter runs. RESULTS The results showed that waist circumference, smoking, and CFI were the significant factors for qualifying in the 3000-meter run. The prediction model was as follows: ln (3000 meters running performance pass probability / fail results probability) = –2.702 – 0.096 × [waist circumference] – 1.827 × [smoke] + 0.020 × [ACi7]. If smoking and the ACi7 were controlled, contestants with a larger waist circumference tended to fail the qualification based on the formula above. If waist circumference and ACi7 were controlled, smokers tended to fail more often than nonsmokers. Finally, we investigated a new calculation method for monitoring cardiac status during exercise that uses the CFI of walking for the runner as a reference to obtain the ratio between the cardiac force of exercise and that of walking (CFR) to provide a standard for determining if the heart is capable of exercise. A relationship is documented between the CFR and the performance of 3000-meter runs in a healthy 22-year-old person. During the running period, data are obtained while participant slowly runs 3000 meters, and the relationship between the CFR and time is plotted. The runner’s CFR varies with changes in activity. Since the runner’s acceleration increases, the CFR quickly increases to an explosive peak, indicating the runner’s explosive power. At this period, the CFI revealed a 3-fold increase (CFR=3) in a strong heart. After a time lapse, the CFR is approximately 2.5 during an endurance period until finishing the 3000-meter run. Similar correlation is found in a runner with a weak heart, with the CFR at the beginning period being 4 and approximately 2.5 thereafter. CONCLUSIONS In conclusion, the study results suggested that measuring the real-time CFR changes could be used in a prediction model for 3000-meter running performance.

scholarly journals The effects of an angiotensin-converting inhibitor (enalapril) on patients with mild cardiac failure-evaluating cardiac function based on the relationship between daily walking pace and heart rate

1998 ◽  
Vol 21 (12) ◽  
pp. 893-898 ◽  
Author(s):  
Eji Ino-Oka ◽  
Showko Umeda ◽  
Yoshiharu Kutsuwa ◽  
Takashi Takahashi ◽  
Kouichi Sagawa ◽  
...  
Keyword(s):  
Heart Rate ◽  
Cardiac Function ◽  
Cardiac Failure ◽  
The Relationship

scholarly journals Physiological Response of Quality Cardiopulmonary Resuscitation, Crossover Trial on Mannequin in Extreme Temperature Conditions

2020 ◽  
Vol 17 (16) ◽  
pp. 5835 ◽  
Author(s):  
José Luis Martin-Conty ◽  
Begoña Polonio-López ◽  
Clara Maestre-Miquel ◽  
Alicia Mohedano-Moriano ◽  
Carlos Durantez-Fernández ◽  
...  
Keyword(s):  
Heart Rate ◽  
Cardiopulmonary Resuscitation ◽  
Extreme Temperature ◽  
Physiological Parameters ◽  
Thermal Environments ◽  
Cpr Quality ◽  
Total Proportion ◽  
The Mean ◽  
The Relationship

Background: To determine the relationship between physiological fatigue and the quality of cardiopulmonary resuscitation (CPR) in trained resuscitators in hostile thermal environments (extreme cold and heat) simulating the different conditions found in an out-of-hospital cardiorespiratory arrest. Methods: Prospective observational study involving 60 students of the health sciences with training in resuscitation, who simulated CPR on a mannequin for 10 min in different thermal environments: thermo-neutral environment (21 °C and 60% humidity), heat environment (41 °C and 98% humidity) and cold environment (−35 °C and 80% humidity). Physiological parameters (heart rate and lactic acid) and CPR quality were monitored. Results: We detected a significant increase in the number of compressions per minute in the “heat environment” group after three minutes and in the mean rate after one minute. We observed a negative correlation between the total number of compressions and mean rate with respect to mean depth. The fraction of compressions (proportion of time in which chest compressions are carried out) was significant over time and the mean rate was higher in the “heat environment”. Physiological parameters revealed no differences in heart rate depending on the resuscitation scenario; however, there was a greater and faster increase in lactate in the “heat environment” (significant at minute 3). The total proportion of participants reaching metabolic fatigue was also higher in the “heat environment”. Conclusions: A warm climate modifies metabolic parameters, reducing the quality of the CPR maneuver.

scholarly journals Cold-hearted bats: Cardiac function and metabolism of small bats during torpor at subzero temperatures

2017 ◽  
Author(s):  
Shannon E. Currie ◽  
Clare Stawski ◽  
Fritz Geiser
Keyword(s):  
Cardiac Function ◽  
Physiological State ◽  
Fold Increase ◽  
Heart Beat ◽  
Small Tree ◽  
Maximum Increase ◽  
Ambient Temperatures ◽  
Subzero Temperatures ◽  
New Information ◽  
The Relationship

AbstractDespite their small size and large relative surface area, many hibernating bats have the ability to thermoregulate and defend their body temperature (Tb) often below 10°C by an increase in metabolic rate. Above a critical temperature (Tcrit) animals usually thermoconform. We investigated the physiological responses above and below Tcrit for a small tree dwelling bat (Chalinolobus gouldii, ∼14g) that is often exposed to subzero temperatures during winter. Through simultaneous measurement of heart rate (HR) and oxygen consumption () we show that the relationship between oxygen transport and cardiac function is substantially altered in thermoregulating torpid bats down to −2°C, compared with thermoconforming torpid bats at mild ambient temperatures (Ta 5-20°C). Tcrit for this species was Ta 0.7 ± 0.4°C, with a corresponding Tb of 1.8 ± 1.2°C. Below this Tcrit animals began to thermoregulate, indicated by a considerable but disproportionate increase in both HR and . The maximum increase in HR was only 4-fold greater than the average thermoconforming minimum, compared to a 46-fold increase in . The differential response of HR and to low Ta was represented by a 15-fold increase in oxygen delivery per heart beat (cardiac oxygen pulse). During torpor at low Ta, thermoregulating bats maintain a relatively slow HR and compensate for increased metabolic demands by significantly increasing stroke volume and tissue oxygen extraction. Our study provides valuable new information on the relationship between metabolism and HR in an unstudied physiological state and further advances our knowledge of the thermogenic capacity of small bats.

Evaluating Training Adaptation With Heart-Rate Measures: A Methodological Comparison

2013 ◽  
Vol 8 (6) ◽  
pp. 688-691 ◽  
Author(s):  
Daniel J. Plews ◽  
Paul B. Laursen ◽  
Andrew E. Kilding ◽  
Martin Buchheit
Keyword(s):  
Heart Rate ◽  
Running Performance ◽  
Positive Adaptation ◽  
Natural Logarithm ◽  
Large Correlation ◽  
The Mean ◽  
Relative Change ◽  
The Relationship ◽  
Methodological Comparison ◽  
Adaptation To Training

The aim of this study was to compare 2 different methodological assessments when analyzing the relationship between performance and heart-rate (HR) -derived indices (resting HR [RHR] and HR variability [HRV]) to evaluate positive adaptation to training. The relative change in estimated maximum aerobic speed (MAS) and 10-km-running performance was correlated to the relative change in RHR and the natural logarithm of the square root of the mean sum of the squared differences between R-R intervals on an isolated day (RHRday; Ln rMSSDday) or when averaged over 1 wk (RHRweek; Ln rMSSDweek) in 10 runners who responded to a 9-wk training intervention. Moderate and small correlations existed between changes in MAS and 10-km-running performance and RHRday (r = .35, 90%CI [–.35, .76] and r = –.21 [–.68, .39]), compared with large and very large correlations for RHRweek (r = –.62 [–.87, –.11] and r = .73 [.30, .91]). While a trivial correlation was observed for MAS vs Ln rMSSDday (r = –.06 [–.59, .51]), a very large correlation existed with Ln rMSSDweek (r = .72 [.28, .91]). Similarly, changes in 10-km-running performance revealed a small correlation with Ln rMSSDday (r = –.17 [–.66, .42]), vs a very large correlation for Ln rMSSDweek (r = –.76 [–.92, –.36]). In conclusion, the averaging of RHR and HRV values over a 1-wk period appears to be a superior method for evaluating positive adaption to training compared with assessing its value on a single isolated day.

scholarly journals THE RELATIONSHIP BETWEEN HEART RATE AND CARDIAC FUNCTION DURING HYPOXIA-ASPHYXIA IN NEWBORN PIGLETS

2018 ◽  
Vol 34 (10) ◽  
pp. S97
Author(s):  
W. Shen ◽  
X. Xu ◽  
T. Lee ◽  
M. Lu ◽  
G. Schmolzer ◽  
...  
Keyword(s):  
Heart Rate ◽  
Cardiac Function ◽  
Newborn Piglets ◽  
The Relationship

Emotional Experiences of Students in the Classroom

2010 ◽  
Vol 15 (2) ◽  
pp. 142-151 ◽  
Author(s):  
Wondimu Ahmed ◽  
Greetje van der Werf ◽  
Alexander Minnaert
Keyword(s):  
Heart Rate ◽  
Emotional Response ◽  
Task Difficulty ◽  
Physiological Reactivity ◽  
Emotional Experiences ◽  
Heart Rate Monitoring ◽  
Coding Scheme ◽  
Stimulated Recall ◽  
Response Systems ◽  
The Relationship

In this article, we report on a multimethod qualitative study designed to explore the emotional experiences of students in the classroom setting. The purpose of the study was threefold: (1) to explore the correspondence among nonverbal expressions, subjective feelings, and physiological reactivity (heart rate changes) of students’ emotions in the classroom; (2) to examine the relationship between students’ emotions and their competence and value appraisals; and (3) to determine whether task difficulty matters in emotional experiences. We used multiple methods (nonverbal coding scheme, video stimulated recall interview, and heart rate monitoring) to acquire data on emotional experiences of six grade 7 students. Concurrent correspondence analyses of the emotional indices revealed that coherence between emotional response systems, although apparent, is not conclusive. The relationship between appraisals and emotions was evident, but the effect of task difficulty appears to be minimal.

The Relationship Between Mindfulness and Heart Rate Variability

2010 ◽  
Author(s):  
Erin V. Rodgers ◽  
Raymond Fleming ◽  
Aaryn R. Schuster
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
The Relationship
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