Effects of Acute Caffeine Supplementation on Performance and Physiological Responses in CrossFit: A Systematic Review and Three-Level Meta-Analysis.

Jishu Xiao, Jinlong Zheng, Qixin Lin, Xin Wang, Linyin Xu, Yanzheng Xie, Yixiang Peng, Yun Gong, Yinhang Cao

Abstract readMeta-AnalysisSystematic Review

In one paragraph

Synthesis in Nutrients, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it

0cells of the map it votes in

0citing papers in PubMed

–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

0 citing papers in PubMed.

No citing paper in PubMed yet.

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

9 authors.

Jishu XiaoDepartment of Public Physical Education, Fujian Agriculture and Forestry University, Fuzhou 350002, China.

Jinlong ZhengSchool of Athletic Performance, Shanghai University of Sport, Shanghai 200438, China.

Qixin LinSchool of Athletic Performance, Shanghai University of Sport, Shanghai 200438, China.

Xin WangChina Institute of Sport and Health Science, Beijing Sport University, Beijing 100084, China.ORCID 0009-0005-6157-3579

Linyin XuFaculty for Physical Education, Shanghai International Study University, Shanghai 200083, China.

Yanzheng XieSchool of Physical Education, Hunan University, Changsha 410082, China.

Yixiang PengFaculty of Health Sciences and Sports, Macao Polytechnic University, Macao 999078, China.ORCID 0009-0000-4333-8499

Yun GongSchool of Physical Education, Shanghai University of Sport, Shanghai 200438, China.

Yinhang CaoSchool of Athletic Performance, Shanghai University of Sport, Shanghai 200438, China.ORCID 0000-0003-2323-3707

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

PubMed holds no abstract for this paper.

Indexed as

Athletic PerformanceCaffeineDietary SupplementsCross-Over StudiesFemaleHumansLactic AcidMaleRandomized Controlled Trials as TopicCaffeineLactic AcidcaffeineCrossFitergogenic aidshigh-intensity functional exercisephysiological indicators

Identifiers

PMID42796953

DOI10.3390/nu18182969

PMCPMC13610431

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.