Evidence map›Paper›PMID 30411235›Full record

ReviewSports medicine (Auckland, N.Z.)2019

Review of WADA Prohibited Substances: Limited Evidence for Performance-Enhancing Effects.

Jules A A C Heuberger, Adam F Cohen

Abstract readReview
In one paragraph

Review in Sports medicine (Auckland, N.Z.), 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed, 1 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

20 citing papers in PubMed, 1 synthesis or guideline pooled it.

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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

2 authors.

Jules A A C HeubergerCentre for Human Drug Research, Zernikedreef 8, 2333 CL, Leiden, The Netherlands. jheuberger@chdr.nl.ORCID http://orcid.org/0000-0001-7202-5088
Adam F CohenCentre for Human Drug Research, Zernikedreef 8, 2333 CL, Leiden, The Netherlands.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The World Anti-Doping Agency is responsible for maintaining a Prohibited List that describes the use of substances and methods that are prohibited for athletes. The list currently contains 23 substance classes, and an important reason for the existence of this list is to prevent unfair competition due to pharmacologically enhanced performance. The aim of this review was to give an overview of the available evidence for performance enhancement of these substance classes. We searched the scientific literature through PubMed for studies and reviews evaluating the effects of substance classes on performance. Findings from double-blind, randomized controlled trials were considered as evidence for (the absence of) effects if they were performed in trained subjects measuring relevant performance outcomes. Only 5 of 23 substance classes show evidence of having the ability to enhance actual sports performance, i.e. anabolic agents, β2-agonists, stimulants, glucocorticoids and β-blockers. One additional class, growth hormone, has similar evidence but only in untrained subjects. The observed effects all relate to strength or sprint performance (and accuracy for β-blockers); there are no studies showing positive effects on reliable markers of endurance performance. For 11 classes, no well-designed studies are available, and, for the remaining six classes, there is evidence of an absence of a positive effect. In conclusion, for the majority of substance classes, no convincing evidence for performance enhancement is available, while, for the remaining classes, the evidence is based on a total of only 266 subjects from 11 studies.

Indexed as

Athletic PerformanceAdrenergic beta-AntagonistsAnabolic AgentsCentral Nervous System StimulantsDoping in SportsEvidence-Based PracticeHuman Growth HormoneHumansIntercellular Signaling Peptides and ProteinsPeptide HormonesPerformance-Enhancing SubstancesRandomized Controlled Trials as TopicSteroidsAdrenergic beta-AntagonistsAnabolic AgentsCentral Nervous System StimulantsHuman Growth HormoneIntercellular Signaling Peptides and ProteinsPeptide HormonesPerformance-Enhancing SubstancesSteroids

Identifiers

PMID30411235
PMCPMC6422964

What OpenQuestion holds

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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.