Evidence map›Paper›PMID 21461928›Full record

ArticleEuropean journal of applied physiology2011

Muscle deoxygenation to VO₂ relationship differs in young subjects with varying τVO₂.

Juan M Murias, Matthew D Spencer, John M Kowalchuk, Donald H Paterson

Abstract read
PubMed Publisher
In one paragraph

Article in European journal of applied physiology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing 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.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

25 citing papers in PubMed.

  1. Aerobic capacity andEuropean journal of applied physiology · 2023
    Trial
  2. Observational
  3. Article
  4. Article
  5. VOLupus · 2025
    Article
  6. Frontiers in physiology · 2025
    Article
  7. Article
  8. Article
  9. Article
  10. Review
  11. Validity of anaerobic threshold measured in resistance exercise.Journal of physical therapy science · 2022
    Article
  12. Longitudinal alterations of pulmonaryFrontiers in sports and active living · 2022
    Article
  13. Article
  14. Association betweenEuropean journal of applied physiology · 2021
    Article
  15. Article
  16. Article
  17. Fitness Level and Not AgingFrontiers in physiology · 2018
    Article
  18. Similar pattern of change in V̇oAmerican journal of physiology. Regulatory, integrative and comparative physiology · 2017
    Article
  19. Article
  20. Article
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

4 authors.

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

Funding

Canadian Institutes of Health Research
6 · The paper itself

Abstract

The relationship between the adjustment of muscle deoxygenation (∆[HHb]) and phase II VO(2p) was examined in subjects presenting with a range of slow to fast VO(2p) kinetics. Moderate intensity VO(2p) and ∆[HHb] kinetics were examined in 37 young males (24 ± 4 years). VO(2p) was measured breath-by-breath. Changes in ∆[HHb] of the vastus lateralis muscle were measured by near-infrared spectroscopy. VO(2p) and ∆[HHb] response profiles were fit using a mono-exponential model, and scaled to a relative % of the response (0-100%). The ∆[HHb]/∆VO(2p) ratio for each individual (reflecting the matching of O(2) distribution to O(2) utilization) was calculated as the average ∆[HHb]/∆VO(2p) response from 20 to 120 s during the exercise on-transient. Subjects were grouped based on individual phase II VO(2p) time-constant (τVO(2p)): <21 s [very fast (VF)]; 21-30 s [fast (F)]; 31-40 s [moderate (M)]; >41 s [slow (S)]. The corresponding ∆[HHb]/∆VO(2p) were 0.98 (VF), 1.05 (F), 1.09 (M), and 1.22 (S). The larger ∆[HHb]/∆VO(2p) in the groups with slower VO(2p) kinetics resulted in the ∆[HHb]/∆VO(2p) displaying a transient "overshoot" relative to the subsequent steady state level, which was progressively reduced as τVO(2) became smaller (r = 0.91). When τVO(2p) > ~20 s, the rate of adjustment of phase II VO(2p) appears to be mainly constrained by the matching of local O(2) distribution to muscle VO(2). These data suggest that in subjects with "slower" VO(2) kinetics, the rate of adjustment of VO(2) may be constrained by O(2) availability within the active tissues related to the matching of microvascular O(2) distribution to muscle O(2) utilization.

Indexed as

Adaptation, PhysiologicalAdultExerciseHumansKineticsMaleMuscle, SkeletalOxygenOxygen ConsumptionSpectroscopy, Near-InfraredYoung AdultOxygen

Identifiers

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.