Evidence map›Paper›PMID 34716905›Full record

SynthesisSports medicine (Auckland, N.Z.)2022

The Hydrating Effects of Hypertonic, Isotonic and Hypotonic Sports Drinks and Waters on Central Hydration During Continuous Exercise: A Systematic Meta-Analysis and Perspective.

David S Rowlands, Brigitte Hani Kopetschny, Claire E Badenhorst

Open access · hybridAbstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in Sports medicine (Auckland, N.Z.), 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed
4.6field-weighted citation impact, top 4% 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

26 citing papers in PubMed, 51 citations in OpenAlex.

  1. Hydrating with a higher-fructose sport drink does not worsen acute kidney injury risk during simulated work-related heat stress.American journal of physiology. Regulatory, integrative and comparative physiology · 2026
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  16. Osmolality and Tonicity of Isotonic Beverages.Foods (Basel, Switzerland) · 2024
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  19. Osmotic Pressure and Its Biological Implications.International journal of molecular sciences · 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

3 authors at 1 institution in 1 country.

David S RowlandsSchool of Sport, Exercise and Nutrition, College of Health, Massey University, Albany Highway, Auckland, New Zealand. D.S.Rowlands@massey.ac.nz.ORCID http://orcid.org/0000-0003-0017-1515
Brigitte Hani KopetschnySchool of Sport, Exercise and Nutrition, College of Health, Massey University, Albany Highway, Auckland, New Zealand.
Claire E BadenhorstSchool of Sport, Exercise and Nutrition, College of Health, Massey University, Albany Highway, Auckland, New Zealand.
Massey University · NZ

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundBody-fluid loss during prolonged continuous exercise can impair cardiovascular function, harming performance. Delta percent plasma volume (dPV) represents the change in central and circulatory body-water volume and therefore hydration during exercise; however, the effect of carbohydrate-electrolyte drinks and water on the dPV response is unclear.

objectiveTo determine by meta-analysis the effects of ingested hypertonic (> 300 mOsmol kg

methodsA systematic review produced 28 qualifying studies and 68 drink treatment effects. Random-effects meta-analyses with repeated measures provided estimates of effects and probability of superiority (p

resultsMean drink effects on dPV were: hypertonic - 7.4% [90% compatibility limits (CL) - 8.5, - 6.3], isotonic - 8.7% (90% CL - 10.1, - 7.4), hypotonic - 6.3% (90% CL - 7.4, - 5.3) and water - 7.5% (90% CL - 8.5, - 6.4). Posterior contrast estimates relative to the smallest important effect (dPV = 0.75%) were: hypertonic-isotonic 1.2% (90% CL - 0.1, 2.6; p

conclusionHypotonic carbohydrate-electrolyte drinks ingested continuously during exercise provide the greatest benefit to hydration.

Indexed as

DehydrationExerciseBayes TheoremHumansOsmolar ConcentrationSodiumWater-Electrolyte BalanceSodium

Identifiers

PMID34716905
PMCPMC8803723
OpenAlexW3209266537

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.