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Can calculating my sweat rate help improve my performance as an athlete?

Yes, knowing your sweat rate empowers you to take control of your hydration, leading to improved performance, better recovery, and reduced risk of dehydration or overhydration. Conducting regular sweat rate tests and maintaining a log allows you to optimize your fluid intake before, during, and after exercise, ensuring you stay hydrated and perform at your best

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Written by: The Athlete’s FoodCoach, on 25-09-2024
Jonas Vingegaard after a realy hot stage of Tour de France 2025

Why can calculating my sweat rate help improve my performance as an athlete?

Regular sweat rate tests and logging your results help you understand your fluid loss in different environmental and training conditions, allowing you to match rehydration to your specific sweat rate:

  1. Prevent dehydration: Dehydration can impair your performance by reducing endurance, increasing heart rate, and making it harder for your body to regulate temperature. By knowing your sweat rate, you can replace lost fluids more accurately, minimizing the risk of dehydration during training or competition and keeping your body functioning optimally
  2. Prevent overhydration: Overhydration, or hyponatremia, occurs when you consume too much fluid, diluting sodium levels in your body. This can lead to serious health risks and affect your performance. Knowing your sweat rate, can help to avoid excessive fluid intake and maintain the right electrolyte balance
  3. Support recovery: Proper rehydration post-exercise aids muscle recovery by replenishing fluids lost during training. By replacing fluids based on your personal sweat rate, you optimize recovery processes such as muscle repair and waste removal, ultimately enhancing your overall recovery time
  4. Support performance: Hydration directly impacts performance, especially in endurance-based sports. Maintaining an optimal fluid balance improves thermoregulation, increases endurance, and ensures consistent power output. A personalized hydration strategy, informed by your sweat rate, ensures you are fueling your body with the right amount of fluids

How do I do a sweat rate test?

  1. Weigh yourself before your ride: Before your ride, go through your usual morning routine, including breakfast, and empty your bladder. Step on the scale just before you go, wearing minimal clothing (naked is preferable for accuracy), and record your weight. This will be your baseline weight before the exercise
  2. During the ride: Keep track of how much bidons you finish and how many pee stops you have. This will be important for calculating fluid intake and output later
  3. Weigh yourself after the ride: Once you finish your ride, avoid drinking or using the bathroom until you've stepped on the scale again. Weigh yourself with minimal clothing (preferably naked) to ensure accuracy, as sweat trapped in clothing can affect the measurement. Record this weight
  4. Use the Sweat Rate Calculator: Input your weight before and after the ride, as well as the volume of fluids you consumed during exercise, into a sweat rate calculator. This will give you an estimate of how much fluid you lost per hour of exercise
  5. Create a sweat log: Start keeping a sweat rate log. For each session, note the date, type of ride, duration, temperature, location, and any other factors that could influence your sweat rate. Over time, this will give you a clearer picture of your hydration needs under different conditions, allowing you to fine-tune your hydration strategy

The FoodCoach app helps you develop your personal hydration strategy before, during, and after training. Use the different challenges to practice hydration strategies

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Popular hydration beverages after cycling

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