I have serious problem with athlete loseing 3L of watter per hour even during light exercise. During extreme endurance events (Ironman) it is almost impossible to replenish water losts.
Dear Viktor, the basic principle to reduce sweat rate is reducing the core temperature. This can be achieved during exercise through regular ingestion of cold water, then applying cold spray, cold towel, direct ice application during play intervals. however your problem seems little serious so better to consult a physician (dermatologist) so that some pharmacological interventions can be started.
The goal would be to minimize fluid losses during exercise. Having appropriate hydration strategies during activity to do so would be the best bet in this athlete. Although gut absorption is less that this athlete's sweat rate, minimizing the difference between total body water losses and fluid intake is a good way of minimizing losses to prevent any performance deficits. It may also be a good idea to assess the amount of sweat electrolyte lost in the sweat of the athlete both unacclimatized and acclimatized to know what those needs may be as well.
Pharmacologic intervention, although possible, may not be the best, especially during intense exercise in the heat. Reducing whole body sweat rate drastically reducing evaporative capacity, thus increasing the risk of exertional heat illness and exertional heat stroke. Appropriate hydration strategies before, during, and after exercise to replenish fluid losses would be the recommended goal for this athlete.
Fully agree with William Adams. Following his rationale - look at a product called Dripdrop. While available OTC, some medical services use it instead of IV fluid replenishment for dehydration or to minimize risk of dehydration. This is NOT electrolyte supplementation, but a way of minimizing electrolyte loss. Adequate info on the manufacturer's website. What's ore - no drugs. If you try it for your purposes - please share findings.
