Evidence map›Paper›PMID 22678970›Full record

ArticleJournal of applied physiology (Bethesda, Md. : 1985)2012

Exercise training and muscle microvascular oxygenation: functional role of nitric oxide.

Daniel M Hirai, Steven W Copp, Scott K Ferguson, Clark T Holdsworth, Danielle J McCullough, Bradley J Behnke, Timothy I Musch, David C Poole

Open access · greenAbstract readComparative Study
In one paragraph

Article in Journal of applied physiology (Bethesda, Md. : 1985), 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed
19.2field-weighted citation impact, top 1% of its field
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

29 citing papers in PubMed, 47 citations in OpenAlex.

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  13. Exercise limitations in heart failure with reduced and preserved ejection fraction.Journal of applied physiology (Bethesda, Md. : 1985) · 2018
    Review
  14. Review
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  16. Exercise training in chronic heart failure: improving skeletal muscle O2 transport and utilization.American journal of physiology. Heart and circulatory physiology · 2015
    Review
  17. Article
  18. Article
  19. Review
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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

8 authors at 2 institutions in 1 country.

Daniel M HiraiDepartment of Anatomy and Physiology, Kansas State University, Manhattan, Kansas 66506-5802, USA.
Steven W Copp
Scott K Ferguson
Clark T Holdsworth
Danielle J McCullough
Bradley J Behnke
Timothy I Musch
David C Poole
Kansas State University · USUniversity of Florida · US

Funding

Mechanisms of Muscle Microcirculatory Dysfunction in Heart FailureR15HL108328 · NHLBI · KANSAS STATE UNIVERSITY · PI POOLE, DAVID C · 2011 to 2015
$741k
Vascular Function with Aging, Viral Gene Therapy and Exercise TrainingK01AG031327 · NIA · UNIVERSITY OF FLORIDA · PI BEHNKE, BRAD J · 2008 to 2012
$589k
NHLBI NIH HHS HL-108328NIA NIH HHS K01 AG031327
6 · The paper itself

Abstract

Exercise training induces multiple adaptations within skeletal muscle that may improve local O(2) delivery-utilization matching (i.e., Po(2)mv). We tested the hypothesis that increased nitric oxide (NO) function is intrinsic to improved muscle Po(2)mv kinetics from rest to contractions after exercise training. Healthy young Sprague-Dawley rats were assigned to sedentary (n = 18) or progressive treadmill exercise training (n = 10; 5 days/wk, 6-8 wk, final workload of 60 min/day at 35 m/min, -14% grade) groups. Po(2)mv was measured via phosphorescence quenching in the spinotrapezius muscle at rest and during 1-Hz twitch contractions under control (Krebs-Henseleit solution), sodium nitroprusside (SNP, NO donor; 300 μM), and N(G)-nitro-L-arginine methyl ester (l-NAME, nonspecific NO synthase blockade; 1.5 mM) superfusion conditions. Exercise-trained rats had greater peak oxygen uptake (Vo(2 peak)) than their sedentary counterparts (81 ± 1 vs. 72 ± 2 ml · kg(-1) · min(-1), respectively; P < 0.05). Exercise-trained rats had significantly slower Po(2)mv fall throughout contractions (τ(1); time constant for the first component) during control (sedentary: 8.1 ± 0.6; trained: 15.2 ± 2.8 s). Compared with control, SNP slowed τ(1) to a greater extent in sedentary rats (sedentary: 38.7 ± 5.6; trained: 26.8 ± 4.1 s; P > 0.05) whereas l-NAME abolished the differences in τ(1) between sedentary and trained rats (sedentary: 12.0 ± 1.7; trained: 11.2 ± 1.4 s; P < 0.05). Our results indicate that endurance exercise training leads to greater muscle microvascular oxygenation across the metabolic transient following the onset of contractions (i.e., slower Po(2)mv kinetics) partly via increased NO-mediated function, which likely constitutes an important mechanism for training-induced metabolic adaptations.

Indexed as

MicrocirculationMuscle ContractionOxygen ConsumptionPhysical ExertionAdaptation, PhysiologicalAnimalsEnergy MetabolismEnzyme InhibitorsKineticsMaleMuscle, SkeletalNitric OxideNitric Oxide DonorsNitric Oxide SynthaseOxygenRatsEnzyme InhibitorsNitric OxideNitric Oxide DonorsNitric Oxide SynthaseOxygen

Identifiers

PMID22678970
PMCPMC3424059
OpenAlexW2126067755

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.