Consequences of Dehydration

Consequences of Dehydration

Studies show that up to 87% of endurance athletes are physically impaired during their workouts and competitions due to dehydration, despite ample access to fluids. Dehydration causes the following physiological phenomena.

  • Decreased blood pressure
  • Increased heart rate
  • Increased respiratory rate
  • Decreased blood flow to extremities

These physiological changes can lead to cardio-respiratory stress, impaired thermoregulation, and fatigue – all of which have a significant impact on athletic performance.

Because the symptoms of mild dehydration are subtle – often imperceptible – athletes suffer the consequences without always knowing it.


Proper hydration is central to feeling energized and motivated. Fatigue and physiological strain manifest at dehydration levels as low as 2%, making a workout feel sluggish and heavy-legged. This not only leads to an athlete feeling flat and listless, but also compromises the quality of the workout and training potential.

Studies show a significant drop in performance at mild dehydration levels as low as 2-3%. This impairment manifests itself in multiple ways.