Evidence map›Paper›PMID 25054553›Full record

Trial reportNutrients2014

Caffeine ingestion after rapid weight loss in judo athletes reduces perceived effort and increases plasma lactate concentration without improving performance.

Joao P Lopes-Silva, Leandro J C Felippe, Marcos D Silva-Cavalcante, Romulo Bertuzzi, Adriano E Lima-Silva

Open access · goldAbstract readRandomized Controlled Trial
PubMed Full text at PMC Publisher
In one paragraph

Trial report in Nutrients, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 8 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed, 8 pooled it
2.3field-weighted citation impact, top 13% 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

21 citing papers in PubMed, 8 syntheses or guidelines pooled it, 40 citations in OpenAlex.

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  8. Acute caffeine supplementation in combat sports: a systematic review.Journal of the International Society of Sports Nutrition · 2018
    Pooled it
  9. Trial
  10. Effects of acute ingestion of caffeinated chewing gum on performance in elite judo athletes.Journal of the International Society of Sports Nutrition · 2021
    Trial
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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

5 authors at 2 institutions in 1 country.

Joao P Lopes-SilvaSport Science Research Group, Department of Physical Education and Sports Science (CAV), Federal University of Pernambuco (Universidade Federal de Pernambuco), Alto do Reservatório street, Bela Vista, Vitória de Santo Antão, Pernambuco 55608-680, Brazil. joao_judo@hotmail.com.
Leandro J C FelippeSport Science Research Group, Department of Physical Education and Sports Science (CAV), Federal University of Pernambuco (Universidade Federal de Pernambuco), Alto do Reservatório street, Bela Vista, Vitória de Santo Antão, Pernambuco 55608-680, Brazil. leandrocamati@hotmail.com.
Marcos D Silva-CavalcanteSport Science Research Group, Department of Physical Education and Sports Science (CAV), Federal University of Pernambuco (Universidade Federal de Pernambuco), Alto do Reservatório street, Bela Vista, Vitória de Santo Antão, Pernambuco 55608-680, Brazil.
Romulo BertuzziSport Science Research Group, Department of Physical Education and Sports Science (CAV), Federal University of Pernambuco (Universidade Federal de Pernambuco), Alto do Reservatório street, Bela Vista, Vitória de Santo Antão, Pernambuco 55608-680, Brazil. bertuzzi@usp.br.
Adriano E Lima-SilvaSport Science Research Group, Department of Physical Education and Sports Science (CAV), Federal University of Pernambuco (Universidade Federal de Pernambuco), Alto do Reservatório street, Bela Vista, Vitória de Santo Antão, Pernambuco 55608-680, Brazil. adrianosilva@usp.br.
Universidade Federal de Pernambuco · BRUniversidade de São Paulo · BR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The objective of this study was to examine the effect of caffeine on judo performance, perceived exertion, and plasma lactate response when ingested during recovery from a 5-day weight loss period. Six judokas performed two cycles of a 5-day rapid weight loss procedure to reduce their body weight by ~5%. After weigh-in, subjects re-fed and rehydrated over a 4-h recovery period. In the third hour of this "loading period", subjects ingested a capsule containing either caffeine (6 mg·kg-1) or placebo. One hour later, participants performed three bouts of a judo fitness test with 5-min recovery periods. Perceived exertion and plasma lactate were measured before and immediately after each test bout. Body weight was reduced in both caffeine and placebo conditions after the weight loss period (-3.9% ± 1.6% and -4.0% ± 2.3% from control, respectively, p < 0.05). At three hours after weigh-in, body weight had increased with both treatments but remained below the control (-3.0% ± 1.3% and -2.7% ± 2.2%). There were no significant differences in the number of throws between the control, caffeine or placebo groups. However, plasma lactate was systemically higher and perceived exertion lower in the subjects who ingested caffeine compared to either the control or placebo subjects (p < 0.05). In conclusion, caffeine did not improve performance during the judo fitness test after a 5-day weight loss period, but reduced perceived exertion and increased plasma lactate.

Indexed as

AthletesMartial ArtsWeight LossAdipose TissueAdultAthletic PerformanceBody CompositionBody WeightCaffeineCross-Over StudiesDouble-Blind MethodHeart RateHumansLactic AcidReproducibility of ResultsYoung AdultCaffeineLactic Acid

Identifiers

PMID25054553
PMCPMC4113770
OpenAlexW2154921506

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.