Hi, thanks for your query on Healthcare Magic. An athlete, including a wrestler needs more nutritional intake and more water than the average person. An athlete is also vulnerable to dehydration. The percentage of body fluids lost depends of course by the type of exercise or the intensity of physical activity performed and also by the duration of exercise / physical activity. When only doing daily activities, lost body fluids are usually only 1.5 - 2 liters / day. But if doing sports or activities with heavy intensity, as much as 3 liters / hour of body fluids can be lost. According to the study: 1. Loss of fluid 2% weight can interfere with cognitive / mental performance and decrease aerobic ability of a person. 2. Losing 9-10% of body weight is even fatal because it interferes with the delivery of nutrients and oxygen to the muscles and vital organs in the body. The most important thing in dehydration is the replacement of lost body fluids, so actually drinking water is the best thing for rehydration. However, in the case of someone exercising for long periods (more than 1 hour) or high intensity exercise, the consumed fluid should contain electrolytes to prevent the occurrence of hyponatremia (decreased plasma electrolyte concentration). Hyponatremia can cause nausea, muscle weakness, and decreased cognitive function. In cases such as marathon athletes, drinks consumed should even contain carbohydrates because it is a source of energy for the body that performs heavy activities for long periods of time. A few hours before wrestling, you should drink 400-600 ml of fluid, then when exercising should consume 200-250 ml every 15-20 minutes. When finished wrestling, it is advisable to drink 500-1000 ml of fluid in the first 3 hours (depending on temperature / weather, and intensity of wrestling). And for hypertension, unfortunately you don t mention whether this is a routine or momentary examination. I suggest that you regularly check your blood pressure and limit salty foods. Take care.