UK Anti-Doping (UKAD) has asked sports to raise awareness of hyponatraemia, sometimes referred to as water intoxication.
Hyponatraemia is very rare but can be serious. It can occur when excessive amounts of fluid are consumed over a short period of time, causing the sodium level in the blood to become abnormally low.
Athletes may sometimes be tempted to drink large amounts of fluid when waiting to provide a urine sample during doping control. However, overhydrating does not necessarily speed up the process. It can result in a sample being too dilute, meaning further samples may be required and the process could take longer.
Athletes should avoid overhydrating before, during and after doping control and make their own informed decisions about hydration. Athletes are not restricted to drinking water during sample collection and may choose other fluids, such as isotonic drinks.
Where possible, athletes may also wish to have a representative with them throughout the doping control process.
Signs and symptoms of hyponatraemia can include headache, nausea or vomiting, dizziness, confusion, fatigue, muscle cramps, seizures and, in severe cases, loss of consciousness.
If there are concerns about any of these symptoms, appropriate medical attention should be sought.
The risk of hyponatraemia following doping control is exceptionally rare. This information is being shared to raise awareness and help athletes make informed decisions around hydration.
