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Exertional heat stress-induced gastrointestinal perturbations: prevention and management strategies
  1. Rhiannon M J Snipe1,2
  1. 1Department of Nutrition, Dietetics and Food, Monash University, Melbourne, Victoria, Australia
  2. 2Centre for Sport Research (CSR), School of Exercise and Nutrition Sciences, Deakin University, Burwood, Victoria, Australia
  1. Correspondence to Dr Rhiannon M J Snipe, Centre for Sport Research, School of Exercise and Nutrition Sciences, Deakin University, Burwood VIC 3125, Australia; r.snipe{at}deakin.edu.au

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What did I do?

I investigated the effects of heat stress and nutrition strategies on gastrointestinal and associated systemic disturbances during endurance running. I aimed to identify the effect of heat stress on gastrointestinal perturbations during prolonged running and subsequently explore the effectiveness of nutrition prevention strategies.

Why did I do it?

Gastrointestinal disturbances are common during endurance running events affecting ≥60% of athletes and may contribute to impaired nutrition intake, poor performance and withdrawal from competition.1 2 The greatest prevalence of gastrointestinal and associated systemic disturbances (eg, endotoxaemia and cytokinaemia) has been reported during endurance running (≥2 hours of running at ≥60% maximal oxygen uptake (VO2max)) events held in the heat.1 No studies had previously explored the effects of heat exposure during endurance running on gastrointestinal symptoms and/or in conjunction with gastrointestinal integrity, systemic endotoxaemia and cytokinaemia. Further, research on prevention strategies targeting the underlying primary mechanisms, such as hyperthermia …

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Footnotes

  • Contributors RMJS developed the manuscript based on research from her PhD which was conducted under the supervision of Dr Ricardo Costa.

  • Funding These studies were supported by a Monash University, Faculty of Medicine, Nursing and Health Sciences, Faculty Strategic Grant Scheme SGS15-0128 and a 2015 Sports Medicine Australia Research Foundation Grant.

  • Patient consent Obtained.

  • Ethics approval Monash University Human Ethics Research Committee.

  • Provenance and peer review Not commissioned; internally peer reviewed.

  • Author note All food and fluid provided in these studies were formulated in-house to produce equivalent solutions that only varied in macronutrient content (hydrolysed whey protein vs glucose-based carbohydrate).

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