Did you know that swimmers sweat?

Even though you are in water, your body produces sweat as a natural response to keep your body cool while you are exercising.

Obviously if you are training in a heated pool, you will produce more sweat than if you are swimming in the cooler waters of an ocean. The amount of sweat you generate depends on a number of factors, including:

  • The temperature of the water.
  • The intensity of the training.
  • Your level of fitness and body condition.

Why would you care?

If you are doing serious swimming training and competition (including triathletes), playing water-based sports like water polo or surfing for long sessions, it is well known amongst elite athletes that you need to ensure that you replenish fluids and electrolytes. But you may not be aware, that you are also losing copious amounts of high-demand amino acids as well.

These amino acids are used in multiple processes in the body as well as the production of protein, hence the term “high-demand”.

To give you some insight into sweat losses from swimming, here are some statistics published in scientific journals:

For context, runners on average generate around 1,500mL per hour.

  • Study 1 found that swimmers on average generated around 900 mL per hour.
  • Study 2 found that swimmers on average generated 300 mL per hour.
  • Study 3 found that
    • Male swimmers lost around 140 mL per Km
    • Female swimmers lost 110 mL per Km
    • Male water polo players lost around
      • 290 mL per hour during training
      • 790 ml per hour during matches

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