The Individual Relationship Between Heart Rate And Oxygen Uptake In People With A Tetraplegia

In this study, criteria are used to identify whether a subject has elicited maximal oxygen uptake. We evaluated the validity of traditional maximal oxygen uptake criteria and propose a novel set of criteria. Twenty athletes completed a maximal oxygen uptake test, consisting of an incremental phase and a subsequent supramaximal phase to exhaustion (verification phase). Traditional and novel maximal oxygen uptake criteria were evaluated. Novel criteria were: oxygen uptake plateau defined as the difference between modelled and actual maximal oxygen uptake >50% of the regression slope of the individual oxygen uptake–workrate relationship; as in the first criterion, but for maximal verification oxygen uptake; and a difference of ≤4 beats·min–1 between maximal heart rate values in the 2 phases. Satisfying the traditional oxygen uptake plateau criterion was largely an artefact of the between-subject variation in the oxygen uptake–workrate relationship. Secondary criteria, supposedly an indicator of maximal effort, were often satisfied long before volitional exhaustion, even at intensities as low as 61% maximal oxygen uptake. No significant mean differences were observed between the incremental and verification phases for oxygen uptake (t = 0.4; p = 0.7) or heart rate (t = 0.8; p = 0.5). The novel oxygen uptake plateau criterion, maximal oxygen uptake verification criterion, and maximal heart rate verification criterion were satisfied by 17, 18, and 18 subjects, respectively. The small individual absolute differences in oxygen uptake between incremental and verification phases observed in most subjects provided additional confidence that maximal oxygen uptake was elicited. Current maximal oxygen uptake criteria were not valid and novel criteria should be further explored.

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Differences in Mechanical Midsole Characteristics of Running Shoes Do Not Influence Physiological Variables in Aerobic and Anaerobic Running

Journal of Human Kinetics ◽

10.2478/hukin-2019-0008 ◽

2019 ◽

Vol 69 (1) ◽

pp. 29-38

Author(s):

Christian Mitschke ◽

Katrin Karger ◽

Thomas L. Milani

Keyword(s):

Heart Rate ◽

Oxygen Uptake ◽

Energy Loss ◽

Ventilatory Threshold ◽

Test Procedure ◽

Physiological Variables ◽

Wide Range ◽

Running Shoes ◽

The Individual ◽

Aerobic And Anaerobic

Abstract The purpose of this study was to determine the influence of footwear stiffness and energy loss on oxygen uptake and heart rate in athletes running under aerobic and anaerobic conditions. Four footwear conditions with identical outsoles, insoles, upper materials, but different mechanical properties regarding polyurethane midsole materials were investigated. Respective midsole material characteristics were selected to represent a wide range of running shoes. The test procedure for eighteen well‐trained male runners was divided into three treadmill testing sessions: an incremental ramp protocol to estimate the individual ventilatory threshold (day 1), a test with 6‐minute stages in each shoe at 70% (aerobic, day 2) and 102% (anaerobic, day 3) of the participant’s ventilatory threshold. For oxygen uptake and the heart rate, no significant differences between footwear conditions were found for either running condition. Furthermore, no significant relationships between physiological variables and mechanical midsole characteristics were found. The wide range of significant stiffness differences in the rearfoot (52.7 N/mm) and forefoot areas (50.7 N/mm), as well as significant differences of the shoe midsole material energy loss in the rearfoot (18.8%) and forefoot areas (10.7%) were too low to influence physiological variables significantly when running below and slightly above the ventilatory threshold. It seems that shoe mass and shoe comfort can influence physiological variables more than the mechanical midsole characteristics of stiffness and energy loss. These results may have practical implications for shoe manufacturers, coaches, and athletes, alike.

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The Individual Relationship Between Heart Rate And Oxygen Uptake In People With A Tetraplegia

Medicine & Science in Sports & Exercise ◽

10.1097/00005768-200505001-01908 ◽

2005 ◽

Vol 37 (Supplement) ◽

pp. S365???S366

Author(s):

Linda Valent ◽

Wijk Zee

Keyword(s):

Heart Rate ◽

Oxygen Uptake ◽

The Individual

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Effect of amiodarone on heart rate variability in patients with newly diagnosed atrial fibrillation (clinical observation)

Medical alphabet ◽

10.33667/2078-5631-2020-21-81-85 ◽

2020 ◽

pp. 81-85

Author(s):

E. P. Popova ◽

O. T. Bogova ◽

S. N. Puzin ◽

D. A. Sychyov ◽

V. P. Fisenko

Keyword(s):

Atrial Fibrillation ◽

Heart Rate ◽

Heart Rate Variability ◽

Drug Therapy ◽

Heart Function ◽

Newly Diagnosed ◽

Class Iii ◽

Spectral Parameters ◽

Patient Will ◽

The Individual

Spectral analysis of heart rate variability gives an idea of the role of the autonomic nervous system in the regulation of chronotropic heart function. This method can be used to evaluate the effectiveness of drug therapy. Drug therapy should be carried out taking into account the individual clinical form of atrial fibrillation. Information about the vegetative status of the patient will undoubtedly increase the effectiveness of treatment. In this study, spectral parameters were studied in patients with newly diagnosed atrial fibrillation. The effect of antiarrhythmic drug class III amiodarone on the spectral parameters of heart rate variability was studied.

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