Horse First Heavy Sweat A horse in work can loose from between five and twenty five litres of sweat per day, depending on a number of factors such as temperament, duration and intensity of exercise and temperature and humidity. The most important electrolytes lost in sweat are sodium, potassium, chloride, and magnesium. The major losses are of chloride followed by sodium and potassium, so it follows that these are the most important to replace. Heavy Sweat is designed to match the proportion of electrolytes lost in sweat following exertion. It is important to note that sweat evaporates quickly in breezy, non-humid conditions. A horse in work may loose a lot of sweat even though sweat may not be seen running down the neck. The amount of Heavy Sweat used should be calculated by the intensity of the work done rather than the amount of sweat visible to the naked eye. Heavy sweat contains salts in similar proportions as those lost in sweat. No filler, Glucose, Bicarbonate or Lactate. Pure body salts. All horses and ponies loose fluid during hard work, exercise and travelling. They loose fluid on cold days as well as warm. Remember to give to all equine athletes when they sweat from pony club to Grand prix: from hunting to racing. Remember: you normally only need to feed an electrolyte supplement when your horse sweats.