scholarly journals Pattern of the Heart Rate Performance Curve in Subjects with Beta-Blocker Treatment and Healthy Controls

2021 ◽  
Vol 6 (3) ◽  
pp. 61
Author(s):  
Philipp Birnbaumer ◽  
Heimo Traninger ◽  
Matteo C. Sattler ◽  
Andrea Borenich ◽  
Peter Hofmann
Keyword(s):  
Heart Rate ◽  
Cycle Ergometer ◽  
Maximal Heart Rate ◽  
Healthy Controls ◽  
Performance Curve ◽  
Rate Performance ◽  
Cycle Ergometer Exercise ◽  
Ergometer Exercise ◽  
Β Blocker ◽  
Age And Sex

(1): Heart rate performance curve (HRPC) in incremental exercise was shown to be not uniform, causing false intensity estimation applying percentages of maximal heart rate (HRmax). HRPC variations are mediated by β-adrenergic receptor sensitivity. The aim was to study age and sex dependent differences in HRPC patterns in adults with β-blocker treatment (BB) and healthy controls (C). (2): A total of 535 (102 female) BB individuals were matched 1:1 for age and sex (male 59 ± 11 yrs, female 61 ± 11 yrs) in C. From the maximum incremental cycle ergometer exercise a first and second heart rate (HR) threshold (Th1 and Th2) was determined. Based on the degree of the deflection (kHR), HRPCs were categorized as regular (downward deflection (kHR > 0.1)) and non-regular (upward deflection (kHR < 0.1), linear time course). (3): Logistic regression analysis revealed a higher odds ratio to present a non-regular curve in BB compared to C (females showed three times higher odds). The odds for non-regular HRPC in BB versus C decreased with older age (OR interaction = 0.97, CI = 0.94–0.99). Maximal and submaximal performance and HR variables were significantly lower in BB (p < 0.05). %HRmax was significantly lower in BB versus C at Th2 (male: 77.2 ± 7.3% vs. 80.8 ± 5.0%; female: 79.2 ± 5.1% vs. 84.0 ± 4.3%). %Pmax at Th2 was similar in BB and C. (4): The HRPC pattern in incremental cycle ergometer exercise is different in individuals receiving β-blocker treatment compared to healthy individuals. The effects were also dependent on age and sex. Relative HR values at Th2 varied substantially depending on treatment. Thus, the percentage of Pmax seems to be a stable and independent indicator for exercise intensity prescription.

Heart rate performance curve during incremental cycle ergometer exercise in healthy young male subjects

1997 ◽  
Vol 29 (6) ◽  
pp. 762-768 ◽  
Author(s):  
PETER HOFMANN ◽  
ROCHUS POKAN ◽  
SERGE P. VON DUVILLARD ◽  
&NA; J. SEIBERT ◽  
ROBERT ZWEIKER ◽  
...  
Keyword(s):  
Heart Rate ◽  
Young Male ◽  
Cycle Ergometer ◽  
Performance Curve ◽  
Rate Performance ◽  
Cycle Ergometer Exercise ◽  
Ergometer Exercise ◽  
Male Subjects

Effects of pregnancy and chronic exercise on maternal cardiac structure and function

1999 ◽  
Vol 77 (11) ◽  
pp. 909-917 ◽  
Author(s):  
L A Wolfe ◽  
R J Preston ◽  
G W Burggraf ◽  
M J McGrath
Keyword(s):  
Heart Rate ◽  
Resting State ◽  
Cycle Ergometer ◽  
Structure And Function ◽  
Cardiac Structure ◽  
Cycle Ergometer Exercise ◽  
Ergometer Exercise ◽  
Aerobic Conditioning ◽  
Cardiac Structure And Function ◽  
And Function

This study examined the interactive effects of pregnancy and aerobic conditioning on maternal cardiac structure and function. Effects of closely monitored cycle ergometer conditioning were studied during the second (TM2) and third trimesters (TM3) in 22 previously sedentary pregnant women (exercised group, EG) and a nonexercising pregnant control group with similar characteristics (CG, n = 19). Subjects were studied in the resting state by two-dimensional echocardiography and during cycle ergometer exercise at three steady-state power outputs at the start of TM2 (ENTRY), at the end of TM2 and TM3 (postconditioning), and 3-4 months postpartum (NPR, nonpregnant reference, CG only). Aerobic conditioning did not increase left ventricular dimensions beyond those attributable to pregnancy itself. In addition, in contrast with previous studies of nonpregnant women, physical conditioning during pregnancy did not reduce heart rate (HR) in the resting state. During exercise, the slope of the HR versus oxygen uptake (Vo2) regression decreased significantly between preconditioning and the end of TM3 in the EG, suggesting that training-induced reductions in HR become more evident with increasing exercise intensity. Also, significant reductions in oxygen pulse (Vo2/HR) were observed at all three work rates in the CG, but not in the EG. These findings support the hypothesis that the cardiovascular effects of aerobic conditioning are obscured by more powerful effects of pregnancy in the resting state but become "unmasked" during strenuous exercise.Key words: human gestation, cycle ergometer exercise, echocardiography, heart rate, stroke volume.

scholarly journals Effects of motor and cognitive dual-task performance in depressive elderly, healthy older adults, and healthy young individuals

2011 ◽  
Vol 5 (3) ◽  
pp. 198-202 ◽  
Author(s):  
Helena Moraes ◽  
Andrea Deslandes ◽  
Heitor Silveira ◽  
Cynthia Arcoverde ◽  
Heloisa Alve ◽  
...  
Keyword(s):  
Older Adults ◽  
Task Performance ◽  
Dual Task ◽  
Cycle Ergometer ◽  
Memory Test ◽  
Maximal Heart Rate ◽  
Healthy Older Adults ◽  
Cycle Ergometer Exercise ◽  
Ergometer Exercise ◽  
Dual Task Performance

Abstract Impairments in dual-task performance can be observed in healthy older adults when motor and cognitive assignments are applied simultaneously. According to the hypofrontality hypothesis, there may be a reduction in frontal cognitive function during exercise. Objective: The aim of the present study was to compare the performance changes on cognitive tests of depressive elderly (n=10), healthy older adults (n=10), and healthy young individuals (n=10) during cycle ergometer exercise. Methods: The groups were submitted to a working memory test, a short memory test and a semantic memory test, before and during a 20-minute cycle ergometer exercise at 80% of their age-predicted maximal heart rate. Results: Significant differences (p=0.04) were observed in scores on the digit backward test during exercise when young individuals were compared to healthy older adults. This result indicates that young subjects, as expected, had better performance than elderly. No significant differences were found among the groups for the digit forward subtest (p=0.40) or the vocabulary test (p=0.69). Conclusion: Data from this study showed that healthy older adults had impaired performance on higher cognitive tasks when these assignments were applied together with motor tasks.

Accuracy and Reproducibility of an Exercise Prescription Based on Ratings of Perceived Exertion for Treadmill and Cycle Ergometer Exercise

1994 ◽  
Vol 78 (3_suppl) ◽  
pp. 1335-1344 ◽  
Author(s):  
Christopher C. Dunbar ◽  
Carole Goris ◽  
Donald W. Michielli ◽  
Michael I. Kalinski
Keyword(s):  
Heart Rate ◽  
Exercise Intensity ◽  
Perceived Exertion ◽  
Exercise Prescription ◽  
Treadmill Exercise ◽  
Cycle Ergometer ◽  
Ratings Of Perceived Exertion ◽  
Cycle Ergometer Exercise ◽  
Ergometer Exercise ◽  
Target Intensity

The accuracy of regularing exercise intensity by Ratings of Perceived Exertion (RPE) was examined. Subjects underwent 4 production trials, 2 on a treadmill (PIA, P1B) and 2 on a cycle ergometer (P2A, P2B). 9 untrained subjects used only their perceptions of effort to regulate exercise intensity. Target intensity was the RPE equivalent to 60% VO2mx. Exercise intensity (VO2) during P1A, P1B, and P2A did not differ from the target, but during P2B was lower than target. During P1A and P1B heart rate did not differ from the target but was lower than target during P2A and P2B. RPE seems a valid means of regulating exercise intensity during repeated bouts of treadmill exercise at 60% VO2max; however, exercise intensity during repeated bouts on the cycle ergometer may be lower than target.

Heart Rate Behavior During 24h Cycle Ergometer Exercise Is Dependent On Total Body Water

2009 ◽  
Vol 41 ◽  
pp. 25
Author(s):  
Rochus Pokan ◽  
Rainer Hochgatterer ◽  
Helmuth Ocenasek ◽  
Sonja Kapiotis ◽  
Karin Vonbank ◽  
...  
Keyword(s):  
Heart Rate ◽  
Total Body Water ◽  
Cycle Ergometer ◽  
Body Water ◽  
Cycle Ergometer Exercise ◽  
Ergometer Exercise ◽  
Rate Behavior ◽  
Total Body
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