Evidence map›Paper›PMID 34402932›Full record

ArticleDiabetologia2021

Twenty-four hour assessments of substrate oxidation reveal differences in metabolic flexibility in type 2 diabetes that are improved with aerobic training.

Elvis A Carnero, Christopher P Bock, Giovanna Distefano, Karen D Corbin, Natalie A Stephens, Richard E Pratley, Steven R Smith, Bret H Goodpaster, Lauren M Sparks

Registry-linked trialOpen access · bronzeAbstract read
PubMed Publisher
In one paragraph

Article in Diabetologia, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT01911104 (Investigating the Underlying Mechanisms of Exercise Resistance in Individuals With Type 2 Diabetes), which is not on this map. Cited by 10 papers.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed
1.2field-weighted citation impact, top 22% 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.

NCT01911104 naactive not recruitingnot on this map

Investigating the Underlying Mechanisms of Exercise Resistance in Individuals With Type 2 Diabetes

TypeinterventionalSponsorAdventHealth Translational Research InstituteRan2013 to 2026Enrolled84ConditionsType 2 DiabetesArmsExercise
3 · Its place in the literature

Who cites it

10 citing papers in PubMed, 15 citations in OpenAlex.

  1. Successfully Reducing Sitting Time Can Improve Metabolic Flexibility.Scandinavian journal of medicine & science in sports · 2025
    Trial
  2. Article
  3. Article
  4. Review
  5. Article
  6. Article
  7. Article
  8. Article
  9. Measurement of 24-h continuous human CHJournal of applied physiology (Bethesda, Md. : 1985) · 2023
    Article
  10. Review
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

9 authors at 2 institutions in 1 country.

Elvis A CarneroTranslational Research Institute, AdventHealth, Orlando, FL, USA.
Christopher P BockTranslational Research Institute, AdventHealth, Orlando, FL, USA.
Giovanna DistefanoTranslational Research Institute, AdventHealth, Orlando, FL, USA.
Karen D CorbinTranslational Research Institute, AdventHealth, Orlando, FL, USA.
Natalie A StephensTranslational Research Institute, AdventHealth, Orlando, FL, USA.
Richard E PratleyTranslational Research Institute, AdventHealth, Orlando, FL, USA.
Steven R SmithTranslational Research Institute, AdventHealth, Orlando, FL, USA.
Bret H GoodpasterTranslational Research Institute, AdventHealth, Orlando, FL, USA.
Lauren M SparksTranslational Research Institute, AdventHealth, Orlando, FL, USA. Lauren.Sparks@adventhealth.com.
Translational Research Institute for Metabolism and Diabetes · USAdventHealth Orlando · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aims/hypothesisThe aim of this study was to assess metabolic flexibility (MetFlex) in participants with type 2 diabetes within the physiologically relevant conditions of sleeping, the post-absorptive (fasting) state and during meals using 24 h whole-room indirect calorimetry (WRIC) and to determine the impact of aerobic training on these novel features of MetFlex.

methodsNormal-weight, active healthy individuals (active; n = 9), obese individuals without type 2 diabetes (ND; n = 9) and obese individuals with type 2 diabetes (n = 23) completed baseline metabolic assessments. The type 2 diabetes group underwent a 10 week supervised aerobic training intervention and repeated the metabolic assessments. MetFlex was assessed by indirect calorimetry in response to insulin infusion and during a 24 h period in a whole-room indirect calorimeter. Indices of MetFlex evaluated by WRIC included mean RQ and RQ kinetic responses after ingesting a standard high-carbohydrate breakfast (RQ

resultsThe three groups had significantly different RQ CONCLUSIONS/

interpretationTwenty-four hour WRIC revealed that physiological RQ responses exemplify differences in MetFlex across a spectrum of metabolic health and correlated with skeletal muscle mitochondrial energetics. Defects in certain features of MetFlex were improved with aerobic training, emphasising the need to assess multiple aspects of MetFlex and disentangle insulin resistance from MetFlex in type 2 diabetes.

trial registrationClinicalTrials.gov NCT01911104.

fundingThis study was funded by the ADA (grant no. 7-13-JF-53).

Indexed as

AdultCalorimetry, IndirectDiabetes Mellitus, Type 2Energy MetabolismExerciseFemaleHumansMagnetic Resonance ImagingMaleMetabolic Networks and PathwaysMiddle AgedMitochondria, MuscleMuscle, SkeletalObesityOxidation-ReductionRespiratory RateClampExercise interventionMeal challengeMetabolic flexibilityMitochondrial capacityWhole-room indirect calorimetry

Identifiers

PMID34402932
OpenAlexW3194020631

What OpenQuestion holds

Textmetadata
Read underepoch 390

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.