Effects of dehydration, hyperthermia, cognition aspects and fatigue balance on sport performance
type: CreativeWork
description: This dissertation presents two studies. The first is a systematic review, aimed at investigating the effects of hypohydration and fluid balance on athlete’s cognitive function. PubMed, Sports Discuss, and Ebsco databases from 2005 to 2020 were searched for studies reporting on hypohydration, fluid balance, and heat on cognitive performance in sport. Search phrases included hydration, dehydration, fluid balance, mood, cognition, vigilance, decision-making, and brain. Participants in the studies received either fluid or none during exercise. Twenty-four trials (n=493 participants) from 24 articles met the inclusion criteria. Significant hypohydration, >2% body mass loss was reported consistently in 16 publications. Five articles reported that hypohydration was associated with heat stress and that limited fluid intake (3-5% body mass loss) impaired cognitive performance. Mood disturbance, fatigue, and ratings of perceived exertion constantly complemented hypohydration impairment on cognition. The second study examined the effects of exercise heat-stress, hyperthermia, dehydration, and fatigue on cognitive performances in semi-professional athletes. Eighteen healthy, active male athletes from individual and team sports who met the following criteria were chosen to participate in the study: age (25 ± 5) years, weight (69.3±6.6) kg; height (172.5±7.8) cm, BMI (23.2±0.9) kg/m² and body fat % (9.2±1.8). Participants completed a cognitive and mood test battery prior, immediately after, and post 120 minutes of treadmill exercise. A soccer-specific intermittent treadmill exercise protocol was completed in four experimental trials in temperate (normothermic) and hot (hyperthermic) conditions. Participants were hydrated and dehydrated in both conditions. Trial conditions were normothermic 16.4±0.02°C and 52±1% relative humidity, while hyperthermic 33.9±0.3°C and 61±1% relative humidity. Response times for the Stroop effect and Visual search tasks were quicker (584 to 690ms, p=0.…
abstract: This dissertation presents two studies. The first is a systematic review, aimed at investigating the effects of hypohydration and fluid balance on athlete’s cognitive function. PubMed, Sports Discuss, and Ebsco databases from 2005 to 2020 were searched for studies reporting on hypohydration, fluid balance, and heat on cognitive performance in sport. Search phrases included hydration, dehydration, fluid balance, mood, cognition, vigilance, decision-making, and brain. Participants in the studies received either fluid or none during exercise. Twenty-four trials (n=493 participants) from 24 articles met the inclusion criteria. Significant hypohydration, >2% body mass loss was reported consistently in 16 publications. Five articles reported that hypohydration was associated with heat stress and that limited fluid intake (3-5% body mass loss) impaired cognitive performance. Mood disturbance, fatigue, and ratings of perceived exertion constantly complemented hypohydration impairment on cognition. The second study examined the effects of exercise heat-stress, hyperthermia, dehydration, and fatigue on cognitive performances in semi-professional athletes. Eighteen healthy, active male athletes from individual and team sports who met the following criteria were chosen to participate in the study: age (25 ± 5) years, weight (69.3±6.6) kg; height (172.5±7.8) cm, BMI (23.2±0.9) kg/m² and body fat % (9.2±1.8). Participants completed a cognitive and mood test battery prior, immediately after, and post 120 minutes of treadmill exercise. A soccer-specific intermittent treadmill exercise protocol was completed in four experimental trials in temperate (normothermic) and hot (hyperthermic) conditions. Participants were hydrated and dehydrated in both conditions. Trial conditions were normothermic 16.4±0.02°C and 52±1% relative humidity, while hyperthermic 33.9±0.3°C and 61±1% relative humidity. Response times for the Stroop effect and Visual search tasks were quicker (584 to 690ms, p=0.…
author: Dube, Adiele
keywords: Cognitive function, fluid replenishment, hypohydration, intermittent exercise
license: https://devspace.unizulu.ac.za/bitstreams/ea03fff0-f5cd-47bc-bf96-f809dec70ae6/download
date published: 2021
date modified: 2026-07-24T06:17:08Z
provider: University of Zululand
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: University of Zululand