Evidence map›Paper›PMID 33372236›Full record

ArticleEuropean journal of applied physiology2021

Six weeks of dynamic apnoeic training stimulates erythropoiesis but does not increase splenic volume.

Antonis Elia, Matthew J Barlow, Oliver J Wilson, John P O'Hara

Open access · hybridAbstract read
In one paragraph

Article in European journal of applied physiology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
1.3field-weighted citation impact, top 16% 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

12 citing papers in PubMed, 18 citations in OpenAlex.

  1. Review
  2. Review
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  4. Review
  5. Skill building in freediving as an example of embodied culture.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2024
    Article
  6. Article
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  8. Effects of hyperventilation on repeated breath-holding while in a fasting state: do risks outweigh the benefits?American journal of physiology. Regulatory, integrative and comparative physiology · 2024
    Article
  9. Increased spleen volume provoked by temperate head-out-of-water immersion.American journal of physiology. Regulatory, integrative and comparative physiology · 2022
    Article
  10. Review
  11. Article
  12. 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

4 authors at 1 institution in 2 countries.

Antonis EliaDivision of Environmental Physiology, School of Chemistry, Bioengineering and Health, KTH Royal Institute of Technology, Berzelius väg 13, Solna, 171 65, Stockholm, Sweden. antonise@kth.se.ORCID http://orcid.org/0000-0002-5991-0733
Matthew J BarlowCarnegie School of Sport, Leeds Beckett University, Leeds, UK.
Oliver J WilsonCarnegie School of Sport, Leeds Beckett University, Leeds, UK.
John P O'HaraCarnegie School of Sport, Leeds Beckett University, Leeds, UK.
Leeds Beckett University · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThis study examined the influence of dynamic apnoea training on splenic volume and haematological responses in non-breath-hold divers (BHD).

methodsEight non-BHD performed ten maximal dynamic apnoeas, four times a week for  six weeks. Splenic volumes were assessed ultrasonically, and blood samples were drawn for full blood count analysis, erythropoietin, iron, ferritin, albumin, protein and osmolality at baseline, 24 h post the completion of each week's training sessions and seven days post the completion of the training programme. Additionally, blood samples were drawn for haematology at 30, 90, and 180 min post session one, twelve and twenty-four.

resultsErythropoietin was only higher than baseline (6.62 ± 3.03 mlU/mL) post session one, at 90 (9.20 ± 1.88 mlU/mL, p = 0.048) and 180 min (9.04 ± 2.35 mlU/mL, p = 0.046). Iron increased from baseline (18 ± 3 µmol/L) post week five (23 ± 2 µmol/L, p = 0.033) and six (21 ± 6 µmol/L; p = 0.041), whereas ferritin was observed to be lower than baseline (111 ± 82 µg/L) post week five (95 ± 75 µg/L; p = 0.016), six (84 ± 74 µg/L; p = 0.012) and one week post-training (81 ± 63 µg/L; p = 0.008). Reticulocytes increased from baseline (57 ± 12 × 10

conclusionsSix weeks of dynamic apnoeic training increase reticulocytes without altering mature erythrocyte concentration and splenic volume.

Indexed as

AdultApneaErythropoiesisErythropoietinExerciseFerritinsHemoglobinsHumansIronMaleSpleenYoung AdultEPO protein, humanErythropoietinFerritinsHemoglobinsIronApnoeaErythrocytesErythropoietinHaemoglobinIronSpleen

Identifiers

PMID33372236
PMCPMC7892731
OpenAlexW3114811818

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.