Evidence map›Paper›PMID 34033984›Full record

SynthesisJournal of sport and health science2023

The effects of plyometric jump training on lower-limb stiffness in healthy individuals: A meta-analytical comparison.

Jason Moran, Bernard Liew, Rodrigo Ramirez-Campillo, Urs Granacher, Yassine Negra, Helmi Chaabene

Abstract readMeta-AnalysisReview
PubMed Full text at PMC Publisher
In one paragraph

Synthesis in Journal of sport and health science, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers, 8 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed, 8 pooled it
–field-weighted citation impact
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, 8 syntheses or guidelines pooled it.

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  18. Enhancing clarity and methodological rigor in umbrella reviews.Annals of medicine and surgery (2012) · 2024
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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

6 authors.

Jason MoranSchool of Sport, Rehabilitation and Exercise Sciences, University of Essex, Colchester, Essex CO43SQ, UK. Electronic address: jmorana@essex.ac.uk.
Bernard LiewSchool of Sport, Rehabilitation and Exercise Sciences, University of Essex, Colchester, Essex CO43SQ, UK.
Rodrigo Ramirez-CampilloDepartment of Physical Activity Sciences, Universidad de Los Lagos, Osorno 5290000, Chile.
Urs GranacherDivision of Training and Movement Science, University of Potsdam, Potsdam 14469, Germany.
Yassine NegraHigher Institute of Sport and Physical Education of Ksar Saïd University of Manouba, Tunis 2037, Tunisia.
Helmi ChaabeneDivision of Training and Movement Science, University of Potsdam, Potsdam 14469, Germany; High Institute of Sports and Physical Education of Kef, University of Jendouba, Jendouba 8189 , Tunisia.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThis study aimed to examine the effects of plyometric jump training (PJT) on lower-limb stiffness.

methodsSystematic searches were conducted in PubMed, Web of Science, and Scopus. Study participants included healthy males and females who undertook a PJT programme isolated from any other training type.

resultsThere was a small effect size (ES) of PJT on lower-limb stiffness (ES = 0.33, 95% confidence interval (95%CI): 0.07-0.60, z = 2.47, p = 0.01). Untrained individuals exhibited a larger ES (ES = 0.46, 95%CI: 0.08-0.84, p = 0.02) than trained individuals (ES = 0.15, 95%CI: ‒0.23 to 0.53, p = 0.45). Interventions lasting a greater number of weeks (>7 weeks) had a larger ES (ES = 0.47, 95%CI: 0.06-0.88, p = 0.03) than those lasting fewer weeks (ES = 0.22, 95%CI: ‒0.12 to 0.55, p = 0.20). Programmes with ≤2 sessions per week exhibited a larger ES (ES = 0.39, 95%CI: 0.01-0.77, p = 0.04) than programmes that incorporated >2 sessions per week (ES = 0.20, 95%CI: -0.10 to 0.50, p = 0.18). Programmes with <250 jumps per week (ES = 0.50, 95%CI: 0.02-0.97, p = 0.04) showed a larger effect than programmes with 250-500 jumps per week (ES = 0.36, 95%CI: 0.00-0.72, p = 0.05). Programmes with >500 jumps per week had negative effects (ES = -0.22, 95%CI: -1.10 to 0.67, p = 0.63). Programmes with >7.5 jumps per set showed larger effect sizes (ES = 0.55, 95%CI: 0.02-1.08, p = 0.04) than those with <7.5 jumps per set (ES = 0.32, 95%CI: 0.01-0.62, p = 0.04).

conclusionPJT enhances lower-body stiffness, which can be optimised with lower volumes (<250 jumps per week) over a relatively long period of time (>7 weeks).

Indexed as

Athletic PerformancePlyometric ExerciseFemaleHumansMaleMuscle StrengthJumpsStretch shortening cycleTendon

Identifiers

PMID34033984
PMCPMC10105022

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.