Hydration during exercise
- Created by: KatieHe
- Created on: 18-04-17 19:42
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- Hydration during exercise
- During exercise
- More water produced during tissue respiration as well as heat energy
- In order to prevent the body from overheating too much, water is bought to skin where sweating occurs
- Loss of water from skins surface causes skin to decrease in temperature, reduces heat production in muscle
- Amount of sweat determined by external temp, body mass and metabolic rate
- Increased water loss via expired air due to increased breathing, kidneys reduce urine flow in attempt to decrease dehydration
- More water lost than produced/ retained, must be replaced to continue at maximal rate
- More water lost as heat than produced in water respiration
- In order to prevent the body from overheating too much, water is bought to skin where sweating occurs
- More water produced during tissue respiration as well as heat energy
- Loss of water
- Means raises osmotic pressure in body fluids because the electrolytes become more concentrated in body fluids
- More fluid should be consumed than thirst dictates
- Only by replenishing water content can the electrolytes return to normal concentration
- Dehydration and loss of performance
- Excessive loss of fluid impairs performance as blood plasma volume decreases and body temperature rises
- Heart rate kept constant if water is consumed during exercise
- Heart rate rises without fluid intake
- Potential benefits of sports drinks
- Sports drinks are designed to supplement energy, fluid, and protein needs of an athlete
- Hypotonic
- Designed to quickly replace fluids lost because they are low in carbs around 4 % glucose
- Isotonic
- Contain concentrationof salt and glucose(5-7%), match levels of conc in blood to maximise fluid intake and absorption
- Hypertonic
- During recovery, drink contains higher levels of glucose, up to 20%, used to replenish depleted glycogen stores, drink asap after exercise period
- During exercise
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