scholarly journals Optimal control of heart rate during treadmill exercise

2017 ◽  
Vol 39 (2) ◽  
pp. 503-518 ◽  
Author(s):  
Kenneth J. Hunt ◽  
Ming Liu
Keyword(s):  
Heart Rate ◽  
Optimal Control ◽  
Treadmill Exercise

scholarly journals Identification of heart rate dynamics during moderate-to-vigorous treadmill exercise

2015 ◽  
Vol 14 (1) ◽  
Author(s):  
Kenneth J. Hunt ◽  
Simon E. Fankhauser ◽  
Jittima Saengsuwan
Keyword(s):  
Heart Rate ◽  
Treadmill Exercise ◽  
Heart Rate Dynamics

Hemodynamic response of normal men to graded treadmill exercise

1964 ◽  
Vol 19 (3) ◽  
pp. 457-464 ◽  
Author(s):  
Burton S. Tabakin ◽  
John S. Hanson ◽  
Thornton W. Merriam ◽  
Edgar J. Caldwell
Keyword(s):  
Carbon Dioxide ◽  
Heart Rate ◽  
Cardiac Output ◽  
Arterial Pressure ◽  
Stroke Volume ◽  
Treadmill Exercise ◽  
Minute Volume ◽  
Peripheral Vascular ◽  
Carbon Dioxide Elimination ◽  
Oxygen Utilization

The physiologic variables defining the circulatory and respiratory state in normal man have been measured in recumbency, standing at rest and during progressively severe grades of exercise approaching near-maximal levels. Indicator-dilution technique was used for determination of cardiac output with simultaneous radio-electrocardiographic recordings of heart rate. Direct intra-arterial pressure measurements were utilized for calculation of peripheral vascular resistance. Minute volume of ventilation, oxygen utilization, and carbon dioxide elimination were obtained from analysis of expired air collected at the time of each cardiac output determination. A peak mean workload of 1,501 kg-m/min was realized during the treadmill exercise. Increases in cardiac output over the range of exercise employed correlated well with indices of workload such as heart rate, oxygen utilization, and minute volume of ventilation. There was no correlation of stroke volume with these indices. It is concluded from examination of individual stroke-volume responses that a progressive increase in stroke volume is not a necessary or constant phenomenon in adapting to increasing workload. cardiac output in treadmill exercise; dye-dilution cardiac output determinations; arterial pressure during upright exercise; stroke-volume response to graded treadmill exercise; exercise response of cardiac output and stroke volume; peripheral vascular resistance response to position and exercise; treadmill exercise—effects on cardiac output, stroke volume, and oxygen uptake; minute ventilation, cardiac output, and stroke volume during exercise; carbon dioxide elimination during treadmill exercise; heart rate and cardiac output during treadmill exercise; exercise; physiology Submitted on July 12, 1963

Aortic blood flow in dogs during treadmill exercise

1959 ◽  
Vol 14 (5) ◽  
pp. 809-812 ◽  
Author(s):  
Dean L. Franklin ◽  
Richard M. Ellis ◽  
R. F. Rushmer
Keyword(s):  
Heart Rate ◽  
Blood Flow ◽  
Treadmill Exercise ◽  
Essential Feature ◽  
Left Ventricular ◽  
Cardiac Response ◽  
Aortic Blood Flow ◽  
Direct Measurements ◽  
Flow Through ◽  
Response To Exercise

Instantaneous blood flow through the thoracic aorta was monitored continuously during spontaneous activity in intact dogs by means of a new, pulsed, ultrasonic flowmeter. Integrated flow per stroke, accumulated flow per unit time and heart rate were simultaneously derived by means of electronic computers. During treadmill exercise at 3 mph on a 5% grade, the heart rate increased by two- or threefold, but the aortic flow per stroke was only slightly increased. This observation was confirmed by direct measurements, of left ventricular diameter. An increase in stroke volume is not an essential feature of the cardiac response to exercise in these experiments. Submitted on December 15, 1958

scholarly journals Reliability of the Polar Vantage M Sports Watch when Measuring Heart Rate at Different Treadmill Exercise Intensities

Sports ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. 117
Author(s):  
Mike Climstein ◽  
Jessica L. Alder ◽  
Alyce M. Brooker ◽  
Elissa J. Cartwright ◽  
Kevin Kemp-Smith ◽  
...  
Keyword(s):  
Heart Rate ◽  
Treadmill Exercise ◽  
Intraclass Correlation ◽  
Good Test ◽  
Good Reliability ◽  
Measurement Variability ◽  
Retest Reliability ◽  
Activity Monitors ◽  
Test Retest Reliability ◽  
Standard Error Of Measurement

Background: Usage of wrist-worn activity monitors has rapidly increased in recent years, and these devices are being used by both fitness enthusiasts and in clinical populations. We, therefore, assessed the test–retest reliability of the Polar Vantage M (PVM) watch when measuring heart rate (HR) during various treadmill exercise intensities. Methods: HR was measured every 30 s (simultaneous electrocardiography (ECG) and PVM). Test–retest reliability was determined using an intraclass correlation coefficient (ICC) with 95% confidence intervals (CIs). Standard error of measurement (SEM) and smallest real difference (SRD) were used to determine measurement variability. Results: A total of 29 participants completed the trials. ICC values for PVM during stages 1, 2 and 5 demonstrated good to excellent test–retest reliability (0.78, 0.78 and 0.92; 95% CI (0.54–0.90, 0.54–0.9, 0.79–0.97)). For PVM during stages 0 (rest), 3 and 4, the ICC values indicated poor to good reliability (0.42, 0.68 and 0.58; 95% CI (−0.27–0.73, 0.32–0.85, 0.14–0.80)). Conclusion: This study identified that the test–retest reliability of the PVM was comparable at low and high exercise intensities; however, it revealed a poor to good test–retest reliability at moderate intensities. The PVM should not be used in a clinical setting where monitoring of an accurate HR is crucial to the patients’ safety.

Sign in / Sign up

Export Citation Format

Share Document