ArticleJournal of athletic training
Mild dehydration and cycling performance during 5-kilometer hill climbing.
Article in Journal of athletic training. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers, 2 of them syntheses that pooled it.
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Who cites it
30 citing papers in PubMed, 2 syntheses or guidelines pooled it.
- Impact of Pre-exercise Hypohydration on Aerobic Exercise Performance, Peak Oxygen Consumption and Oxygen Consumption at Lactate Threshold: A Systematic Review with Meta-analysis.Sports medicine (Auckland, N.Z.) · 2020Pooled it
- Performance Changes Following Heat Acclimation and the Factors That Influence These Changes: Meta-Analysis and Meta-Regression.Frontiers in physiology · 2019Pooled it
- Effects of Quercetin and Citrulline on Nitric Oxide Metabolites and Antioxidant Biomarkers in Trained Cyclists.Nutrients · 2025Trial
- The effect of quercetin and citrulline on cycling time trial performance.Journal of the International Society of Sports Nutrition · 2024Trial
- A randomized, cross-over trial assessing effects of beverage sodium concentration on plasma sodium concentration and plasma volume during prolonged exercise in the heat.European journal of applied physiology · 2023Trial
- Effects of Heat Acclimation Following Heat Acclimatization on Whole Body Heat Exchange in Trained Endurance Athletes.International journal of environmental research and public health · 2022Trial
- Hypohydration impairs endurance performance: a blinded study.Physiological reports · 2017Trial
- Comparison of pilocarpine- versus exercise-induced sweat sodium concentration across exercise intensities in trained athletes.Physiological reports · 2026Article
- Hydration Status in Adolescent Alpine Skiers During a Training Camp.Journal of human kinetics · 2021Article
- Contribution of Dietary Composition on Water Turnover Rates in Active and Sedentary Men.Nutrients · 2021Article
- Article
- Review
- Acute Kidney Injury Biomarkers and Hydration Outcomes at the Boston Marathon.Frontiers in physiology · 2021Article
- Effects of electrolyzed hydrogen water ingestion during endurance exercise in a heated environment on body fluid balance and exercise performance.Temperature (Austin, Tex.) · 2020Article
- Fluid Balance and Hydration Considerations for Women: Review and Future Directions.Sports medicine (Auckland, N.Z.) · 2020Review
- Does Hypohydration Really Impair Endurance Performance? Methodological Considerations for Interpreting Hydration Research.Sports medicine (Auckland, N.Z.) · 2019Review
- Self-Selected Pacing during a 24 h Track Cycling World Record.International journal of environmental research and public health · 2019Article
- Hydration Status and Cardiovascular Function.Nutrients · 2019Review
- Hydration Status and Fluid Needs of Division I Female Collegiate Athletes Exercising Indoors and Outdoors.Sports (Basel, Switzerland) · 2019Article
- Observational study of the effects of upper respiratory tract infection on hydration status.Multidisciplinary respiratory medicine · 2019Article
Corrections and comments
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Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
contextHydration has been shown to be an important factor in performance; however, the effects of mild dehydration during intense cycling are not clear.
objectiveTo determine the influence of mild dehydration on cycling performance during an outdoor climbing trial in the heat (ambient temperature = 29.0°C ± 2.2°C).
designCrossover study.
settingOutdoor. PATIENTS OR OTHER
participantsTen well-trained, male endurance cyclists (age = 28 ± 5 years, height = 182 ± 0.4 cm, mass = 73 ± 4 kg, maximal oxygen uptake = 56 ± 9 mL·min(-1)·kg(-1), body fat = 23% ± 2%, maximal power = 354 ± 48 W). INTERVENTION(S): Participants completed 1 hour of steady-state cycling with or without drinking to achieve the desired pre-exercise hydration level before 5-km hill-climbing cycling. Participants started the 5-km ride either euhydrated (EUH) or dehydrated by -1% of body mass (DEH). MAIN OUTCOME MEASURE(S): Performance time, core temperature, sweat rate, sweat sensitivity, and rating of perceived exertion (RPE).
resultsParticipants completed the 5-km ride 5.8% faster in the EUH (16.6 ± 2.3 minutes) than DEH (17.6 ± 2.9 minutes) trial (t1 = 10.221, P = .001). Postexercise body mass was -1.4% ± 0.3% for the EUH trial and -2.2% ± 0.2% for the DEH trial (t1 = 191.384, P < .001). Core temperature after the climb was greater during the DEH (39.2°C ± 0.3°C) than EUH (38.8°C ± 0.2°C) trial (t1 = 8.04, P = .005). Sweat rate was lower during the DEH (0.44 ± 0.16 mg·m(-2)·s(-1)) than EUH (0.51 ± 0.16 mg·m(-2)·s(-1)) trial (t8 = 2.703, P = .03). Sweat sensitivity was lower during the DEH (72.6 ± 32 g·°C(-1)·min(-1)) than EUH (102.6 ± 54.2 g·°C(-1)·min(-1)) trial (t8 = 3.072, P = .02). Lastly, RPE after the exercise performance test was higher for the DEH (19.0 ± 1.0) than EUH (17.0 ± 1.0) participants (t9 = -3.36, P = .008).
conclusionsWe found mild dehydration decreased cycling performance during a 5-km outdoor hill course, probably due to greater heat strain and greater perceived intensity.
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Registered trials
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.