Kinesiology 3339A/B Lecture Notes - Lecture 30: Caffeine, Tonicity, Sports Drink
19 Oct 2016
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What needs to be replaced: fluid losing water and increasing body temperature, cho losing it in fuel for exercise, na+ losing it when sweat losses high and water intake high, prevalent types of rehydration. Glucose electrolyte solutions (ges) - sports drinks. 6-8% cho (mixture of cho including simple sugars, anything higher than this amount will result in osmotic effect that pulls fluid away - not what you want) plus. Nacl, potassium, phosphorous (to enhance thirst mechanism and high fluid absorption) Glucose polymer solutions (gps) - 8-20 molecules of glucose, higher simple sugar concentrations slow gastric emptying - higher glucose concentration and less fluid. They allow more cho in drink without increases osmotic pressure. Glucose polymers do not have this osmotic pressure effect. Fluid requirements are of higher priority, will choose ges more often when sweating a lot. However, if you are in cold situation when sweating less, will choose gps. Factors affecting/limiting gastric emptying (transit through stomach: 1.
