Evidence map›Paper›PMID 34823469›Full record

ArticleBMC neuroscience2021

Comparison of the effects of open vs. closed skill exercise on the acute and chronic BDNF, IGF-1 and IL-6 response in older healthy adults.

Tom Behrendt, Franziska Kirschnick, Lasse Kröger, Phillip Beileke, Maxim Rezepin, Tanja Brigadski, Volkmar Leßmann, Lutz Schega

Open access · goldAbstract readComparative Study
In one paragraph

Article in BMC neuroscience, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed, 1 pooled it
2.1field-weighted citation impact, top 12% 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

25 citing papers in PubMed, 1 synthesis or guideline pooled it, 33 citations in OpenAlex.

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  8. Neurobiophilia.Brain sciences · 2026
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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 4 institutions in 1 country.

Tom Behrendt *Chair for Health and Physical Activity, Department of Sport Science, Faculty of Humanities, Otto-von-Guericke University Magdeburg, Magdeburg, Germany. tom.behrendt@ovgu.de.ORCID http://orcid.org/0000-0003-4103-4592
Franziska Kirschnick *Department of Internal Medicine, Division of Cardiology and Angiology, University Hospital Magdeburg, Magdeburg, Germany.
Lasse KrögerChair for Health and Physical Activity, Department of Sport Science, Faculty of Humanities, Otto-von-Guericke University Magdeburg, Magdeburg, Germany.
Phillip BeilekeChair for Health and Physical Activity, Department of Sport Science, Faculty of Humanities, Otto-von-Guericke University Magdeburg, Magdeburg, Germany.
Maxim RezepinChair for Health and Physical Activity, Department of Sport Science, Faculty of Humanities, Otto-von-Guericke University Magdeburg, Magdeburg, Germany.
Tanja BrigadskiDepartment of Informatics and Microsystem Technology, University of Applied Sciences, Kaiserslautern, Germany.
Volkmar LeßmannInstitute of Physiology, Medical Faculty, Otto-von-Guericke University Magdeburg, Magdeburg, Germany.
Lutz SchegaChair for Health and Physical Activity, Department of Sport Science, Faculty of Humanities, Otto-von-Guericke University Magdeburg, Magdeburg, Germany.
Otto-von-Guericke-Universität Magdeburg · DECenter for Behavioral Brain Sciences · DEUniversity Hospital Magdeburg · DEUniversity of Applied Sciences Kaiserslautern · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAccumulating evidence shows that physical exercise has a positive effect on the release of neurotrophic factors and myokines. However, evidence regarding the optimal type of physical exercise for these release is still lacking. The aim of this study was to assess the acute and chronic effects of open-skill exercise (OSE) compared to closed-skill exercise (CSE) on serum and plasma levels of brain derived neurotrophic factor (BDNF

methodsTo investigate acute effects, thirty-eight participants were randomly assigned to either an intervention (badminton (aOSE) and bicycling (aCSE), n  = 24, 65.83 ± 5.98 years) or control group (reading (CG), n  = 14, 67.07 ± 2.37 years). Blood samples were taken immediately before and 5 min after each condition. During each condition, heart rate was monitored. The mean heart rate of aOSE and aCSE were equivalent (65 ± 5% of heart rate reserve). In a subsequent 12-week training-intervention, twenty-two participants were randomly assigned to either a sport-games (cOSE, n  = 6, 64.50 ± 6.32) or a strength-endurance training (cCSE, n  = 9, 64.89 ± 3.51) group to assess for chronic effects. Training intensity for both groups was adjusted to a subjective perceived exertion using the CR-10 scale (value 7). Blood samples were taken within one day after the training-intervention.

resultsBDNF

conclusionOur results indicate that both exercise types are efficient to acutely increase BDNF

Indexed as

AgedAgingBrain-Derived Neurotrophic FactorExerciseHeart RateHumansInsulin-Like Growth Factor IInterleukin-6MaleBDNF protein, humanBrain-Derived Neurotrophic FactorIGF1 protein, humanInsulin-Like Growth Factor IInterleukin-6AgingBrain-derived neurotrophic factor (BDNF)Closed skill exerciseInsulin-like growth factor 1 (IGF-1)Interleukin-6 (IL-6)Open skill exercise

Identifiers

PMID34823469
PMCPMC8614060
OpenAlexW3214921363

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.