scholarly journals Effects of muscle cooling on kinetics of pulmonary oxygen uptake and muscle deoxygenation at the onset of exercise

2018 ◽  
Vol 6 (21) ◽  
pp. e13910 ◽  
Author(s):  
Hitoshi Wakabayashi ◽  
Mizuki Osawa ◽  
Shunsaku Koga ◽  
Ke Li ◽  
Hiroyuki Sakaue ◽  
...  
Keyword(s):  
Oxygen Uptake ◽  
Pulmonary Oxygen Uptake ◽  
Muscle Deoxygenation ◽  
Muscle Cooling ◽  
Kinetics Of

scholarly journals What is the effect of ischemic preconditioning on the kinetics of pulmonary oxygen uptake and muscle deoxygenation during exercise?

2015 ◽  
Vol 3 (9) ◽  
pp. e12540 ◽  
Author(s):  
Jeann L. C. Sabino-Carvalho ◽  
Thales Coelho Barbosa ◽  
Bruno Moreira Silva
Keyword(s):  
Oxygen Uptake ◽  
Ischemic Preconditioning ◽  
Pulmonary Oxygen Uptake ◽  
Muscle Deoxygenation ◽  
Kinetics Of

scholarly journals Pulmonary oxygen uptake and muscle deoxygenation kinetics during heavy intensity cycling exercise in patients with emphysema and idiopathic pulmonary fibrosis

2017 ◽  
Vol 17 (1) ◽  
Author(s):  
Melitta A. McNarry ◽  
Nicholas K. Harrison ◽  
Tom Withers ◽  
Narendra Chinnappa ◽  
Michael J. Lewis
Keyword(s):  
Idiopathic Pulmonary Fibrosis ◽  
Pulmonary Fibrosis ◽  
Oxygen Uptake ◽  
Cycling Exercise ◽  
Pulmonary Oxygen Uptake ◽  
Muscle Deoxygenation

scholarly journals Influence Of Body Position On Pulmonary Oxygen Uptake And Muscle Deoxygenation Kinetics During Cycle Exercise

2020 ◽  
Vol 52 (7S) ◽  
pp. 207-207
Author(s):  
Richie P. Goulding ◽  
Dai Okushima ◽  
Simon Marwood ◽  
Tze-Tuan Lei ◽  
Narihiko Kondo ◽  
...  
Keyword(s):  
Oxygen Uptake ◽  
Body Position ◽  
Cycle Exercise ◽  
Pulmonary Oxygen Uptake ◽  
Muscle Deoxygenation

Effects of prior heavy-intensity exercise on oxygen uptake and muscle deoxygenation kinetics of a subsequent heavy-intensity cycling and knee-extension exercise

2012 ◽  
Vol 37 (1) ◽  
pp. 138-148 ◽  
Author(s):  
Sarah Margaret Cleland ◽  
Juan Manuel Murias ◽  
John Michael Kowalchuk ◽  
Donald Hugh Paterson
Keyword(s):  
Oxygen Uptake ◽  
Response Time ◽  
Slow Component ◽  
Knee Extension ◽  
Phase 2 ◽  
Mean Response Time ◽  
Muscle Deoxygenation ◽  
Component Amplitude ◽  
Knee Extension Exercise ◽  
Kinetics Of

This study examined the effects of prior heavy-intensity exercise on the adjustment of pulmonary oxygen uptake (VO2p) and muscle deoxygenation Δ[HHb] during the transition to subsequent heavy-intensity cycling (CE) or knee-extension (KE) exercise. Nine young adults (aged 24 ± 5 years) performed 4 repetitions of repeated bouts of heavy-intensity exercise separated by light-intensity CE and KE, which included 6 min of baseline exercise, a 6-min step of heavy-intensity exercise (H1), 6-min recovery, and a 6-min step of heavy-intensity exercise (H2). Exercise was performed at 50 r·min–1 or contractions per minute per leg. Oxygen uptake (VO2) mean response time was ∼20% faster (p < 0.05) during H2 compared with H1 in both modalities. Phase 2 time constants (τ) were not different between heavy bouts of CE (H1, 29.6 ± 6.5 s; H2, 28.0 ± 4.6 s) or KE exercise (H1, 31.6 ± 6.7 s; H2, 29.8 ± 5.6 s). The VO2 slow component amplitude was lower (p < 0.05) in H2 in both modalities (CE, 0.19 ± 0.06 L·min–1; KE, 0.12 ± 0.07 L·min–1) compared with H1 (CE, 0.29 ± 0.09 L·min–1; KE, 0.18 ± 0.07 L·min–1), with the contribution of the slow component to the total VO2 response reduced (p < 0.05) in H2 during both exercise modes. The effective τHHb was similar between bouts for CE (H1, 18.2 ± 3.0 s; H2, 18.0 ± 3.6 s) and KE exercise (H1, 26.0 ± 7.0 s; H2, 24.0 ± 5.8 s). The ΔHHb slow component was reduced during H2 in both CE and KE (p < 0.05). In conclusion, phase 2 VO2p was unchanged with priming exercise; however, a faster mean response time of VO2p during the heavy-intensity exercise preceded by a priming heavy-intensity exercise was attributed to a smaller slow component and reduced muscle deoxygenation indicative of improved muscle O2 delivery during the second bout of exercise.

scholarly journals The effects of short work vs. longer work periods within intermittent exercise on V̇o2p kinetics, muscle deoxygenation, and energy system contribution

2017 ◽  
Vol 122 (6) ◽  
pp. 1435-1444 ◽  
Author(s):  
Michael C. McCrudden ◽  
Daniel A. Keir ◽  
Glen R. Belfry
Keyword(s):  
Oxygen Uptake ◽  
Near Infrared ◽  
Intermittent Exercise ◽  
Vastus Lateralis ◽  
Lactate Concentration ◽  
Energy System ◽  
Pulmonary Oxygen Uptake ◽  
Muscle Deoxygenation ◽  
Rest Periods ◽  
Step Transition

We examined the effects of inserting 3-s recovery periods during high-intensity cycling exercise at 25-s and 10-s intervals on pulmonary oxygen uptake (V̇o2p), muscle deoxygenation [deoxyhemoglobin (HHb)], their associated kinetics (τ), and energy system contributions. Eleven men (24 ± 3 yr) completed two trials of three cycling protocols: an 8-min continuous protocol (CONT) and two 8-min intermittent exercise protocols with work-to-rest periods of 25 s to 3 s (25INT) and 10 s to 3 s (10INT). Each protocol began with a step-transition from a 20-W baseline to a power output (PO) of 60% between lactate threshold and maximal V̇o2p (Δ60). This PO was maintained for 8 min in CONT, whereas 3-s periods of 20-W cycling were inserted every 10 s and 25 s after the transition to Δ60 in 10INT and 25INT, respectively. Breath-by-breath gas exchange measured by mass spectrometry and turbine and vastus lateralis [HHb] measured by near-infrared spectroscopy were recorded throughout. Arterialized-capillary lactate concentration ([Lac−]) was obtained before and 2 min postexercise. The τV̇o2p was lowest ( P < 0.05) for 10INT (24 ± 4 s) and 25INT (23 ± 5 s) compared with CONT (28 ± 4 s), whereas HHb kinetics did not differ ( P > 0.05) between conditions. Postexercise [Lac−] was lowest ( P < 0.05) for 10INT (7.0 ± 1.7 mM), was higher for 25INT (10.3 ± 1.9 mM), and was greatest in CONT (14.3 ± 3.1 mM). Inserting 3-s recovery periods during heavy-intensity exercise speeded V̇o2p kinetics and reduced overall V̇o2p, suggesting an increased reliance on PCr-derived phosphorylation during the work period of INT compared with an identical PO performed continuously. NEW & NOTEWORTHY We report novel observations on the effects of differing heavy-intensity work durations between 3-s recovery periods on pulmonary oxygen uptake (V̇o2p) kinetics, muscle deoxygenation, and energy system contributions. Relative to continuous exercise, V̇o2p kinetics are faster in intermittent exercise, and increased frequency of 3-s recovery periods improves microvascular O2 delivery and reduces V̇o2p and arterialized-capillary lactate concentration. The metabolic burden of identical intensity work is altered when performed intermittently vs. continuously.

Impaired oxygen uptake efficiency slope and off-transient kinetics of pulmonary oxygen uptake in sickle cell anemia are associated with hemorheological abnormalities

2015 ◽  
Vol 60 (4) ◽  
pp. 413-421 ◽  
Author(s):  
Keyne Charlot ◽  
Xavier Waltz ◽  
Mona Hedreville ◽  
Stéphane Sinnapah ◽  
Nathalie Lemonne ◽  
...  
Keyword(s):  
Oxygen Uptake ◽  
Sickle Cell ◽  
Sickle Cell Anemia ◽  
Transient Kinetics ◽  
Pulmonary Oxygen Uptake ◽  
Uptake Efficiency ◽  
Oxygen Uptake Efficiency Slope ◽  
Kinetics Of

Effects of glutamine and hyperoxia on pulmonary oxygen uptake and muscle deoxygenation kinetics

2006 ◽  
Vol 99 (2) ◽  
pp. 149-161 ◽  
Author(s):  
Simon Marwood ◽  
Joanna L. Bowtell
Keyword(s):  
Oxygen Uptake ◽  
Pulmonary Oxygen Uptake ◽  
Muscle Deoxygenation

Abnormal Pulmonary Oxygen Uptake and Skeletal Muscle Deoxygenation Kinetics are not Obligatory Features of the Type II Diabetic Condition

2010 ◽  
Vol 42 ◽  
pp. 136
Author(s):  
Daryl Wilkerson ◽  
Andrew M. Jones ◽  
Angela C. Shore ◽  
David C. Poole
Keyword(s):  
Skeletal Muscle ◽  
Oxygen Uptake ◽  
Type Ii ◽  
Pulmonary Oxygen Uptake ◽  
Muscle Deoxygenation

Pulmonary oxygen uptake and muscle deoxygenation kinetics during recovery in trained and untrained male adolescents

2011 ◽  
Vol 111 (11) ◽  
pp. 2775-2784 ◽  
Author(s):  
Simon Marwood ◽  
Denise Roche ◽  
Max Garrard ◽  
Viswanath B. Unnithan
Keyword(s):  
Oxygen Uptake ◽  
Pulmonary Oxygen Uptake ◽  
Male Adolescents ◽  
Muscle Deoxygenation
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