Evidence map›Paper›PMID 33751469›Full record

SynthesisSports medicine (Auckland, N.Z.)2021

Development of Maximal Dynamic Strength During Concurrent Resistance and Endurance Training in Untrained, Moderately Trained, and Trained Individuals: A Systematic Review and Meta-analysis.

Henrik Petré, Erik Hemmingsson, Hans Rosdahl, Niklas Psilander

Open access · hybridAbstract readMeta-AnalysisSystematic Review
PubMed Full text at PMC Publisher
In one paragraph

Synthesis in Sports medicine (Auckland, N.Z.), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers, 13 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
37citing papers in PubMed, 13 pooled it
7.6field-weighted citation impact, top 2% 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

37 citing papers in PubMed, 13 syntheses or guidelines pooled it, 61 citations in OpenAlex.

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  16. Resistance Training for Cyclists: Scientific Evidence and Practical Recommendations.Scandinavian journal of medicine & science in sports · 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

4 authors at 1 institution in 1 country.

Henrik PetréDepartment of Physiology, Nutrition and Biomechanics, The Swedish School of Sport and Health Sciences, SE-114 86, PO Box 5626, Stockholm, Sweden. henrik.petre@gih.se.ORCID http://orcid.org/0000-0001-8767-5235
Erik HemmingssonDepartment of Physical Activity and Health, The Swedish School of Sport and Health Sciences, SE-114 86, PO Box 5626, Stockholm, Sweden.
Hans RosdahlDepartment of Physiology, Nutrition and Biomechanics, The Swedish School of Sport and Health Sciences, SE-114 86, PO Box 5626, Stockholm, Sweden.
Niklas PsilanderDepartment of Physiology, Nutrition and Biomechanics, The Swedish School of Sport and Health Sciences, SE-114 86, PO Box 5626, Stockholm, Sweden.
Swedish School of Sport and Health Sciences · SE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe effect of concurrent training on the development of maximal strength is unclear, especially in individuals with different training statuses.

objectiveThe aim of this systematic review and meta-analysis study was to compare the effect of concurrent resistance and endurance training with that of resistance training only on the development of maximal dynamic strength in untrained, moderately trained, and trained individuals.

methodsOn the basis of the predetermined criteria, 27 studies that compared effects between concurrent and resistance training only on lower-body 1-repetition maximum (1RM) strength were included. The effect size (ES), calculated as the standardised difference in mean, was extracted from each study, pooled, and analysed with a random-effects model.

resultsThe 1RM for leg press and squat exercises was negatively affected by concurrent training in trained individuals (ES =  - 0.35, p < 0.01), but not in moderately trained ( - 0.20, p = 0.08) or untrained individuals (ES = 0.03, p = 0.87) as compared to resistance training only. A subgroup analysis revealed that the negative effect observed in trained individuals occurred only when resistance and endurance training were conducted within the same training session (ES same session =  - 0.66, p < 0.01 vs. ES different sessions =  - 0.10, p = 0.55).

conclusionThis study demonstrated the novel and quantifiable effects of training status on lower-body strength development and shows that the addition of endurance training to a resistance training programme may have a negative impact on lower-body strength development in trained, but not in moderately trained or untrained individuals. This impairment seems to be more pronounced when training is performed within the same session than in different sessions. Trained individuals should therefore consider separating endurance from resistance training during periods where the development of dynamic maximal strength is prioritised.

Indexed as

Endurance TrainingResistance TrainingHumansMuscle, SkeletalMuscle StrengthPhysical EnduranceWeight Lifting

Identifiers

PMID33751469
PMCPMC8053170
OpenAlexW3137227793

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.