Dehydration: what happens in your body and how you can avoid the harmful effects.
Fact: When you go out for a run or for a ride, your body’s heat production can increase up to twenty-fold compared to rest.
What happens in your body:
- Loss of body water through sweat manifests primarily in a lowered blood volume, or hypovolemia.
- When blood volume is low, it compromises the body's ability to deliver oxygen as efficiently.
- To compensate, heart rate and respiratory rate increase.
- If dehydration, and therefore blood volume, continues to worsen, circulation can be reduced to the extremities, in order to preserve critical oxygen levels for the vital organs.
How it affects you:
- 87% of endurance athletes are physically impaired during their workouts and competitions due to dehydration.
- In addition to physical impairments, mild dehydration causes cognitive impairments up to 20% affecting speed, accuracy, and memory.
- Mild dehydration can result in an endurance performance impairment of up to 29%.
- When an athlete consumes only water and neglects to replenish electrolytes, hyponatremia can occur, which causes the body’s cells to swell and can be life-threatening.
To avoid dehydration:
- Hydrate early. By the time you feel thirsty it's already too late.
- Put in as much effort to properly hydrate during short distances as you do for longer distances.
- Ensure that you're consuming both water and electrolytes as your body needs both in order to avoid dehydration.
*Nix provides real-time hydration data that tells athletes when, what, and how much to drink during a workout. Athletes can view their individual sweat data on a phone, watch, or bike computer. For more information visit nixbiosensors.com.