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Related Experiment Video

Updated: Jul 3, 2026

Determining the Contribution of the Energy Systems During Exercise

Determining the Contribution of the Energy Systems During Exercise

Published on: March 20, 2012

Sports drinks, exercise training, and competition.

Serge P von Duvillard¹, Paul J Arciero, Tara Tietjen-Smith

¹Human Performance Laboratory, Department of Health and Human Performance, Texas A&M University-Commerce, Commerce, Texas 75429-3011, USA. serge_vonduvillard@tamu-commerce.edu

Current Sports Medicine Reports

|July 9, 2008

Summary

Proper hydration is crucial for athletes to maintain physical performance and prevent heat-related illnesses. Both dehydration and overhydration can negatively impact health and athletic outcomes.

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Area of Science:

Sports Science
Exercise Physiology
Nutrition Science

Background:

Adequate fluid intake before, during, and after exercise is vital for optimal physical performance.
Research indicates that insufficient hydration can significantly impair performance and increase risks of heat-related injuries.
Conversely, excessive fluid consumption may lead to dangerous conditions like hyponatremia.

Purpose of the Study:

To review the effects of fluid intake on athletic performance and health.
To highlight the importance of maintaining proper hydration status in training and competition.
To discuss the risks associated with both dehydration and overhydration.

Main Methods:

Literature review of studies on fluid intake and exercise.
Analysis of the physiological impacts of hydration status on performance.
Examination of recommendations for fluid and electrolyte replacement during prolonged exercise.

Main Results:

Inadequate fluid intake leads to decreased performance, increased thermal stress, reduced plasma volume, and accelerated fatigue.
Athletes in prolonged endurance events benefit from fluids containing carbohydrates and electrolytes.
Overhydration carries risks such as sodium depletion and hyponatremia.

Conclusions:

Maintaining proper hydration is essential for reducing fluid loss and heat stress.
Optimal hydration supports sustained performance, lower heart rate during exercise, and preserved plasma volume.
Athletes should carefully manage fluid intake to avoid the detrimental effects of both dehydration and overhydration.