Evidence map›Paper›PMID 26664350›Full record

ArticleJournal of the International Society of Sports Nutrition2015

Short-term creatine supplementation has no impact on upper-body anaerobic power in trained wrestlers.

Martin Aedma, Saima Timpmann, Evelin Lätt, Vahur Ööpik

Open access · goldAbstract read
In one paragraph

Article in Journal of the International Society of Sports Nutrition, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed, 4 pooled it
0.9field-weighted citation impact, top 26% 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

14 citing papers in PubMed, 4 syntheses or guidelines pooled it, 33 citations in OpenAlex.

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  4. Acute caffeine supplementation in combat sports: a systematic review.Journal of the International Society of Sports Nutrition · 2018
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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.

Martin AedmaInstitute of Exercise Biology and Physiotherapy, Estonian Centre of Behavioral and Health Sciences, University of Tartu, 18 Ülikooli St, Tartu, 50090 Estonia.
Saima TimpmannInstitute of Exercise Biology and Physiotherapy, Estonian Centre of Behavioral and Health Sciences, University of Tartu, 18 Ülikooli St, Tartu, 50090 Estonia.
Evelin LättInstitute of Sport Pedagogy and Coaching, University of Tartu, 18 Ülikooli St, Tartu, 50090 Estonia.
Vahur ÖöpikInstitute of Exercise Biology and Physiotherapy, Estonian Centre of Behavioral and Health Sciences, University of Tartu, 18 Ülikooli St, Tartu, 50090 Estonia.
University of Tartu · EE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundCreatine (CR) is considered an effective nutritional supplement having ergogenic effects, which appears more pronounced in upper-body compared to lower-body exercise. Nevertheless, results regarding the impact of CR loading on repeated high-intensity arm-cranking exercise are scarce and in some cases conflicting. Interestingly, few of the conducted studies have structured their research designs to mimic real world sporting events. Therefore, our purpose was to address the hypothesis that CR ingestion would increase anaerobic power output in consecutive upper-body intermittent sprint performance (UBISP) tests designed to simulate wrestling matches on a competition-day.

methodsIn a double-blind, placebo-controlled, parallel-group study, 20 trained wrestlers were assigned to either placebo or CR supplemented group (0.3 g ∙ kg(-1) of body mass per day). Four 6-min UBISP tests interspersed with 30-min recovery periods were performed before (trial 1) and after 5 days (trial 2) of supplementation. Each test consisted of six 15-s periods of arm-cranking at maximal executable cadence against resistance of 0.04 kg ∙ kg(-1) body mass interspersed with 40-s unloaded easy cranking periods and 5-s acceleration intervals (T1-T4). Mean power (MP), peak power (PP), fatigue index and heart rate parameters were measured during UBISP tests. Also, body weight and hydration status were assessed. Principle measures were statistical analysed with mixed-model ANOVAs.

resultsMean individual CR consumption in the CR group was 24.8 ± 2.5 g ∙ d(-1). No significant (P > 0.05) differences occurred in body mass or hydration status indices between the groups or across trials. MP, PP and fatigue index responses were unaffected by supplementation; although, a significant reduction in MP and PP did occurred from T1 to T4 in both trial 1 and 2 (P < 0.001). Overall heart rate responses in the tests tended to be higher in the CR than PLC group (P < 0.05); but, trends in responses in trials and tests were comparable (P > 0.05).

conclusionThese results suggest that 5-day CR supplementation has no impact on upper-body muscle anaerobic power output in consecutive UBISP anaerobic tests mimicking wrestling matches on a competition day.

Indexed as

WrestlingAdultAthletic PerformanceBody Mass IndexCreatineDietary SupplementsDouble-Blind MethodFatigueHumansLactatesMaleMuscle, SkeletalPhysical ExertionSports Nutritional Physiological PhenomenaTorsoCreatineLactatesBrazilian Jiu JitsuDietary supplementErgogenic aidPhysical performanceSubmission wrestling

Identifiers

PMID26664350
PMCPMC4673838
OpenAlexW2190205007

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.