Evidence map›Paper›PMID 20150562›Full record

ArticleJournal of applied physiology (Bethesda, Md. : 1985)2010

Speeding of VO2 kinetics with endurance training in old and young men is associated with improved matching of local O2 delivery to muscle O2 utilization.

Juan M Murias, John M Kowalchuk, Donald H Paterson

Registry-linked trialAbstract read
In one paragraph

Article in Journal of applied physiology (Bethesda, Md. : 1985), 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT03043469 (Dysfunctional Breathing), which is not on this map. Cited by 68 papers.

0numbers the graph read from it
0cells of the map it votes in
68citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT03043469 unknown statusnot on this mapstarted 2020, after this paper: background citation

Dysfunctional Breathing: Multidimensional Characterisation and Assessment Tool

TypeobservationalSponsorBrunel UniversityRan2020 to 2021Enrolled141ConditionsRespiration Disorder, Hyperventilation Syndrome, Breathlessness, Breath ShortnessArmsShort-form survey instrument, Demographic data, Hospital Anxiety and Depression Scale, Nijmegen questionnaire, The Self-evaluation of breathing questionnaire
3 · Its place in the literature

Who cites it

68 citing papers in PubMed.

  1. Trial
  2. Exercise training-induced speeding ofEuropean journal of applied physiology · 2025
    Trial
  3. Aerobic capacity andEuropean journal of applied physiology · 2023
    Trial
  4. Cocoa-flavanols enhance moderate-intensity pulmonaryEuropean journal of applied physiology · 2021
    Trial
  5. Trial
  6. Trial
  7. Trial
  8. Trial
  9. Review
  10. Article
  11. VOLupus · 2025
    Article
  12. Article
  13. Article
  14. Leg cycling efficiency is unaltered in healthy aging regardless of sex or training status.Journal of applied physiology (Bethesda, Md. : 1985) · 2024
    Article
  15. Article
  16. Article
  17. Article
  18. Article
  19. Review
  20. Longitudinal alterations of pulmonaryFrontiers in sports and active living · 2022
    Article

8 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors.

Juan M MuriasCanadian Centre for Activity and Aging, University of Western Ontario, London, Ontario, Canada.
John M Kowalchuk
Donald H Paterson

Funding

Canadian Institutes of Health Research
6 · The paper itself

Abstract

The time course and mechanisms of adjustment of pulmonary oxygen uptake (V(O(2))) kinetics (time constant tauV(O(2p))) were examined during step transitions from 20 W to moderate-intensity cycling in eight older men (O; 68 +/- 7 yr) and eight young men (Y; 23 +/- 5 yr) before training and at 3, 6, 9, and 12 wk of endurance training. V(O(2p)) was measured breath by breath with a volume turbine and a mass spectrometer. Changes in deoxygenated hemoglobin concentration (Delta[HHb]) were measured by near-infrared spectroscopy. V(O(2p)) and Delta[HHb] were modeled with a monoexponential model. Training was performed on a cycle ergometer three times per week for 45 min at approximately 70% of peak V(O(2)). Pretraining tauV(O(2p)) was greater (P < 0.05) in O (43 +/- 10 s) than Y (34 +/- 8 s). tauV(O(2p)) decreased (P < 0.05) by 3 wk of training in both O (35 +/- 9 s) and Y (22 +/- 8 s), with no further changes thereafter. The pretraining overall adjustment of Delta[HHb] was faster than tauV(O(2p)) in both O and Y, resulting in Delta[HHb]/V(O(2p)) displaying an "overshoot" during the transient relative to the subsequent steady-state level. After 3 wk of training the Delta[HHb]/V(O(2p)) overshoot was attenuated in both O and Y. With further training, this overshoot persisted in O but was eliminated after 6 wk in Y. The training-induced speeding of V(O(2p)) kinetics in O and Y at 3 wk of training was associated with an improved matching of local O(2) delivery to muscle V(O(2)) (as represented by a lower Delta[HHb]/V(O(2p))). The continued overshoot in Delta[HHb]/V(O(2p)) in O may reflect a reduced vasodilatory responsiveness that may limit muscle blood flow distribution during the on-transient of exercise.

Indexed as

AgedAgingBreath TestsExerciseExercise TestExercise ToleranceHemoglobinsHumansKineticsMaleOxygenOxygen ConsumptionPulmonary Diffusing CapacityQuadriceps MuscleSpectroscopy, Near-InfraredYoung AdultferrylhemoglobinHemoglobinsOxygen

Identifiers

PMID20150562
PMCPMC2853203

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Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.