Journal of Applied Physiology AJP: Gastrointestinal and Liver Physiology
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
QUICK SEARCH:   [advanced]


     

J Appl Physiol (December 3, 2004). doi:10.1152/japplphysiol.01028.2004
This Article
Right arrow Full Text (PDF) Free
Right arrow All Versions of this Article:
98/4/1371    most recent
01028.2004v1
Right arrow Submit a response
Right arrow Alert me when this article is cited
Right arrow Alert me when eLetters are posted
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Gurd, B. J
Right arrow Articles by Kowalchuk, J. M
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Gurd, B. J
Right arrow Articles by Kowalchuk, J. M
Submitted on September 16, 2004
Accepted on November 29, 2004

Prior Heavy-Intensity Exercise Speeds VO2 Kinetics During Moderate-Intensity Exercise in Young Adults

Brendon J Gurd1, Barry W Scheuermann2, Donald H Paterson1, and John M Kowalchuk3*

1 Canadian Centre for Activity and Aging, The University of Western Ontario, London, Ontario, Canada; School of Kinesiology, The University of Western Ontario, London, Ontario, Canada
2 Department of Kinesiology, The University of Toledo, Toledo, Ohio, USA
3 Canadian Centre for Activity and Aging, The University of Western Ontario, London, Ontario, Canada; School of Kinesiology, The University of Western Ontario, London, Ontario, Canada; Department of Physiology and Pharmacology, The University of Western Ontario, London, Ontario, Canada

* To whom correspondence should be addressed. E-mail: jkowalch{at}uwo.ca.

The effect of prior heavy-intensity (HVY) exercise on subsequent moderate-intensity (MOD) phase II pulmonary O2 uptake kinetics ({tau}VO2) was examined in young adults exhibiting relatively fast (FK; {tau}VO2 < 30s; n=6) and slow (SK; {tau}VO2 > 30s; n=6) VO2 kinetics. Subjects performed 4 repetitions of a MOD1-HVY-MOD2 protocol on a cycle ergometer with work rates corresponding to 80% estimated lactate threshold ({Theta}L) (MOD1; MOD2), and 50% difference between {Theta}L and VO2peak (HVY); each transition lasted 6 min and each was preceded by 6 min cycling at 20W. VO2 and heart rate (HR) were measured breath-by-breath and beat-by-beat, respectively; concentration changes of muscle deoxy- (HHb); oxy- (O2Hb) and total-hemoglobin (HbTOT) were measured by near-infrared spectroscopy (Hamamatsu NIRO 300). {tau}VO2 was lower (P<0.05) in Mod2 than Mod1 in both FK (Mod2, 20 (±5)s; Mod1, 26 (±5)s) and SK (Mod2, 30 (±8)s; Mod1, 45 (±11)s); linear regression analysis showed a greater "speeding" of VO2 kinetics in subjects exhibiting a greater MOD1 {tau}VO2. HR, O2Hb and HbTOT were elevated (P<0.05) in Mod2 compared to Mod1. The delay prior to an increase in HHb (HHb TD) was reduced (P<0.05) in Mod2, while the MRT-HHb was reduced (P<0.05) in FK (Mod2, 22 (±3)s; Mod1, 32 (±11)s) but not different in SK (Mod2, 36 (±13)s; Mod1, 34 (±15)s). We conclude that improved muscle perfusion in MOD2 may have contributed to the faster adaptation of VO2, especially in SK, however a possible role for metabolic inertia in some subjects cannot be overlooked.




This article has been cited by other articles:


Home page
 Am. J. Physiol. Regul. Integr. Comp. Physiol.Home page
T. Saitoh, L. F. Ferreira, T. J. Barstow, D. C. Poole, A. Ooue, N. Kondo, and S. Koga
Effects of prior heavy exercise on heterogeneity of muscle deoxygenation kinetics during subsequent heavy exercise
Am J Physiol Regulatory Integrative Comp Physiol, September 1, 2009; 297(3): R615 - R621.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Physiol. Regul. Integr. Comp. Physiol.Home page
B. J. Gurd, S. J. Peters, G. J. F. Heigenhauser, P. J. LeBlanc, T. J. Doherty, D. H. Paterson, and J. M. Kowalchuk
Prior heavy exercise elevates pyruvate dehydrogenase activity and muscle oxygenation and speeds O2 uptake kinetics during moderate exercise in older adults
Am J Physiol Regulatory Integrative Comp Physiol, September 1, 2009; 297(3): R877 - R884.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
M. Buchheit, P. B. Laursen, and S. Ahmaidi
Effect of prior exercise on pulmonary O2 uptake and estimated muscle capillary blood flow kinetics during moderate-intensity field running in men
J Appl Physiol, August 1, 2009; 107(2): 460 - 470.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
B. R. McKay, D. H. Paterson, and J. M. Kowalchuk
Effect of short-term high-intensity interval training vs. continuous training on O2 uptake kinetics, muscle deoxygenation, and exercise performance
J Appl Physiol, July 1, 2009; 107(1): 128 - 138.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
F. J. DiMenna, D. P. Wilkerson, M. Burnley, S. J. Bailey, and A. M. Jones
Influence of priming exercise on pulmonary O2 uptake kinetics during transitions to high-intensity exercise at extreme pedal rates
J Appl Physiol, February 1, 2009; 106(2): 432 - 442.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
F. J. DiMenna, D. P. Wilkerson, M. Burnley, and A. M. Jones
Influence of priming exercise on pulmonary O2 uptake kinetics during transitions to high-intensity exercise from an elevated baseline
J Appl Physiol, August 1, 2008; 105(2): 538 - 546.
[Abstract] [Full Text] [PDF]

Home page
 Exp PhysiolHome page
A. M. Jones, J. Fulford, and D. P. Wilkerson
Influence of prior exercise on muscle [phosphorylcreatine] and deoxygenation kinetics during high-intensity exercise in men
Exp Physiol, April 1, 2008; 93(4): 468 - 478.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Physiol. Regul. Integr. Comp. Physiol.Home page
B. J. Gurd, S. J. Peters, G. J. F. Heigenhauser, P. J. LeBlanc, T. J. Doherty, D. H. Paterson, and J. M. Kowalchuk
O2 uptake kinetics, pyruvate dehydrogenase activity, and muscle deoxygenation in young and older adults during the transition to moderate-intensity exercise
Am J Physiol Regulatory Integrative Comp Physiol, February 1, 2008; 294(2): R577 - R584.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
S. Koga, D. C. Poole, L. F. Ferreira, B. J. Whipp, N. Kondo, T. Saitoh, E. Ohmae, and T. J. Barstow
Spatial heterogeneity of quadriceps muscle deoxygenation kinetics during cycle exercise
J Appl Physiol, December 1, 2007; 103(6): 2049 - 2056.
[Abstract] [Full Text] [PDF]

Home page
 J. Physiol.Home page
L. M. K. Chin, R. J. Leigh, G. J. F. Heigenhauser, H. B. Rossiter, D. H. Paterson, and J. M. Kowalchuk
Hyperventilation-induced hypocapnic alkalosis slows the adaptation of pulmonary O2 uptake during the transition to moderate-intensity exercise
J. Physiol., August 15, 2007; 583(1): 351 - 364.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
G. H. Raymer, S. C. Forbes, J. M. Kowalchuk, R. T. Thompson, and G. D. Marsh
Prior exercise delays the onset of acidosis during incremental exercise
J Appl Physiol, May 1, 2007; 102(5): 1799 - 1805.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
R. A. Howlett, C. A. Kindig, and M. C. Hogan
Intracellular PO2 kinetics at different contraction frequencies in Xenopus single skeletal muscle fibers
J Appl Physiol, April 1, 2007; 102(4): 1456 - 1461.
[Abstract] [Full Text] [PDF]

Home page
 J. Physiol.Home page
B. J. Gurd, S. J. Peters, G. J. F. Heigenhauser, P. J. LeBlanc, T. J. Doherty, D. H. Paterson, and J. M. Kowalchuk
Prior heavy exercise elevates pyruvate dehydrogenase activity and speeds O2 uptake kinetics during subsequent moderate-intensity exercise in healthy young adults
J. Physiol., December 15, 2006; 577(3): 985 - 996.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
A. M. Jones, N. J. A. Berger, D. P. Wilkerson, and C. L. Roberts
Effects of "priming" exercise on pulmonary O2 uptake and muscle deoxygenation kinetics during heavy-intensity cycle exercise in the supine and upright positions
J Appl Physiol, November 1, 2006; 101(5): 1432 - 1441.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
N. D. Paterson, J. M. Kowalchuk, and D. H. Paterson
Effects of prior heavy-intensity exercise during single-leg knee extension on vO2 kinetics and limb blood flow
J Appl Physiol, October 1, 2005; 99(4): 1462 - 1470.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
Visit Other APS Journals Online
Copyright © 1966 by the American Physiological Society.