Oxygen uptake and heart rate kinetics during heavy exercise: a comparison between arm cranking and leg cycling

2002 ◽  
Vol 88 (1-2) ◽  
pp. 100-106 ◽  
Author(s):  
Donald Schneider ◽  
Andrew Wing ◽  
Norman Morris
Keyword(s):  
Heart Rate ◽  
Oxygen Uptake ◽  
Heavy Exercise ◽  
Arm Cranking ◽  
Leg Cycling ◽  
Rate Kinetics ◽  
Heart Rate Kinetics

scholarly journals Living In Confinement Conditions: Physical Training Can Improve Muscular Oxygen Uptake and Heart Rate Kinetics

2019 ◽  
Vol 51 (Supplement) ◽  
pp. 465
Author(s):  
Uwe Hoffmann ◽  
Uwe Drescher ◽  
Lutz Thieschäfer ◽  
Jessica Koschate
Keyword(s):  
Heart Rate ◽  
Oxygen Uptake ◽  
Physical Training ◽  
Rate Kinetics ◽  
Heart Rate Kinetics

Oxygen Uptake and Heart Rate Kinetics during Moderate and Heavy Work-to-Work Transitions

2006 ◽  
Vol 38 (Supplement) ◽  
pp. S325
Author(s):  
Robert G. Haennel ◽  
Corey R. Tomczak ◽  
Russell J. Down ◽  
Bharath Krishnan
Keyword(s):  
Heart Rate ◽  
Oxygen Uptake ◽  
Work Transitions ◽  
Rate Kinetics ◽  
Heavy Work ◽  
Heart Rate Kinetics

Heart Rate and Oxygen Uptake Kinetics in Type 2 Diabetes Patients – A Pilot Study on the Influence of Cardiovascular Medication on Regulatory Processes

2017 ◽  
Vol 125 (05) ◽  
pp. 275-281 ◽  
Author(s):  
Jessica Koschate ◽  
Uwe Drescher ◽  
Klaus Baum ◽  
Christian Brinkmann ◽  
Thorsten Schiffer ◽  
...  
Keyword(s):  
Heart Rate ◽  
Oxygen Uptake ◽  
Cross Correlation ◽  
Oxygen Uptake Kinetics ◽  
Uptake Kinetics ◽  
Cardiovascular Medication ◽  
Regulatory Processes ◽  
Rate Kinetics ◽  
Heart Rate Kinetics

AbstractThe aim of this pilot study was to investigate whether there are differences in heart rate and oxygen uptake kinetics in type 2 diabetes patients, considering their cardiovascular medication. It was hypothesized that cardiovascular medication would affect heart rate and oxygen uptake kinetics and that this could be detected using a standardized exercise test. 18 subjects were tested for maximal oxygen uptake. Kinetics were measured in a single test session with standardized, randomized moderate-intensity work rate changes. Time series analysis was used to estimate kinetics. Greater maxima in cross-correlation functions indicate faster kinetics. 6 patients did not take any cardiovascular medication, 6 subjects took peripherally acting medication and 6 patients were treated with centrally acting medication. Maximum oxygen uptake was not significantly different between groups. Significant main effects were identified regarding differences in muscular oxygen uptake kinetics and heart rate kinetics. Muscular oxygen uptake kinetics were significantly faster than heart rate kinetics in the group with no cardiovascular medication (maximum in cross-correlation function of muscular oxygen uptake vs. heart rate; 0.32±0.08 vs. 0.25±0.06; p=0.001) and in the group taking peripherally acting medication (0.34±0.05 vs. 0.28±0.05; p=0.009) but not in the patients taking centrally acting medication (0.28±0.05 vs. 0.30±0.07; n.s.). It can be concluded that regulatory processes for the achievement of a similar maximal oxygen uptake are different between the groups. The used standardized test provided plausible results for heart rate and oxygen uptake kinetics in a single measurement session in this patient group.

scholarly journals Effects of hypoxic hypoxia on O2 uptake and heart rate kinetics during heavy exercise

1996 ◽  
Vol 81 (6) ◽  
pp. 2500-2508 ◽  
Author(s):  
Marielle Engelen ◽  
Janos Porszasz ◽  
Marshall Riley ◽  
Karlman Wasserman ◽  
Kazuhira Maehara ◽  
...  
Keyword(s):  
Heart Rate ◽  
Time Constant ◽  
Slow Component ◽  
Hypoxic Hypoxia ◽  
Baseline Heart Rate ◽  
Heavy Exercise ◽  
Rate Kinetics ◽  
Lactic Acidosis Threshold ◽  
Kinetics Of ◽  
Heart Rate Kinetics

Engelen, Marielle, Janos Porszasz, Marshall Riley, Karlman Wasserman, Kazuhira Maehara, and Thomas J. Barstow. Effects of hypoxic hypoxia on O2 uptake and heart rate kinetics during heavy exercise. J. Appl. Physiol. 81(6): 2500–2508, 1996.—It is unclear whether hypoxia alters the kinetics of O2 uptake (V˙o 2) during heavy exercise [above the lactic acidosis threshold (LAT)] and how these alterations might be linked to the rise in blood lactate. Eight healthy volunteers performed transitions from unloaded cycling to the same absolute heavy work rate for 8 min while breathing one of three inspired O2 concentrations: 21% (room air), 15% (mild hypoxia), and 12% (moderate hypoxia). Breathing 12% O2 slowed the time constant but did not affect the amplitude of the primary rise inV˙o 2 (period of first 2–3 min of exercise) and had no significant effect on either the time constant or the amplitude of the slowV˙o 2 component (beginning 2–3 min into exercise). Baseline heart rate was elevated in proportion to the severity of the hypoxia, but the amplitude and kinetics of increase during exercise and in recovery were unaffected by level of inspired O2. We conclude that the predominant effect of hypoxia during heavy exercise is on the early energetics as a slowed time constant forV˙o 2 and an additional anaerobic contribution. However, the sum total of the processes representing the slow component ofV˙o 2 is unaffected.

305 EFFECT OF AEROBIC EXERCISE TRAINING ON OXYGEN UPTAKE AND HEART RATE KINETICS IN THE ELDERLY

1993 ◽  
Vol 25 (Supplement) ◽  
pp. S55
Author(s):  
S. M. McCue ◽  
L. R. Reider ◽  
J. E. Graves ◽  
L. B. Panton ◽  
L. Garzarella ◽  
...  
Keyword(s):  
Heart Rate ◽  
Exercise Training ◽  
Oxygen Uptake ◽  
Aerobic Exercise ◽  
The Elderly ◽  
Aerobic Exercise Training ◽  
Rate Kinetics ◽  
Heart Rate Kinetics

Pulmonary Oxygen Uptake and Heart Rate Kinetics During the Six-Minute Walk Test in Transplant Recipients

2008 ◽  
Vol 85 (1) ◽  
pp. 29-35 ◽  
Author(s):  
Corey R. Tomczak ◽  
Darren E.R. Warburton ◽  
Kenneth J. Riess ◽  
Nicholas G. Jendzjowsky ◽  
Ben T. Esch ◽  
...  
Keyword(s):  
Heart Rate ◽  
Oxygen Uptake ◽  
Walk Test ◽  
Transplant Recipients ◽  
Pulmonary Oxygen Uptake ◽  
Six Minute Walk Test ◽  
Rate Kinetics ◽  
Heart Rate Kinetics ◽  
Minute Walk

V˙o 2 and heart rate kinetics in cycling: transitions from an elevated baseline

2001 ◽  
Vol 90 (6) ◽  
pp. 2081-2087 ◽  
Author(s):  
S. E. Bearden ◽  
R. J. Moffatt
Keyword(s):  
Heart Rate ◽  
Base Excess ◽  
Slow Component ◽  
Lactate Concentration ◽  
Fast Component ◽  
Square Wave ◽  
Mean Response Time ◽  
Rate Kinetics ◽  
Component Amplitude ◽  
Heart Rate Kinetics

The purpose of this study was to examine oxygen consumption (V˙o 2) and heart rate kinetics during moderate and repeated bouts of heavy square-wave cycling from an exercising baseline. Eight healthy, male volunteers performed square-wave bouts of leg ergometry above and below the gas exchange threshold separated by recovery cycling at 35%V˙o 2 peak.V˙o 2 and heart rate kinetics were modeled, after removal of phase I data by use of a biphasic on-kinetics and monoexponential off-kinetics model. Fingertip capillary blood was sampled 45 s before each transition for base excess, HCO[Formula: see text] and lactate concentration, and pH. Base excess and HCO[Formula: see text] concentration were significantly lower, whereas lactate concentration and pH were not different before the second bout. The results confirm earlier reports of a smaller mean response time in the second heavy bout. This was the result of a significantly greater fast-component amplitude and smaller slow-component amplitude with invariant fast-component time constant. A role for local oxygen delivery limitation in heavy exercise transitions with unloaded but not moderate baselines is presented.

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