hydration Flashcards
1
Q
water percentages in the body
A
- 50-60% water - lean body tissues 75% water - fat mass 5-10% water
2
Q
what are the functions of water in the body?
A
- nutrient transport - protection (tears and synovial) - temp reg - a medium for reactions like water in cells
3
Q
how does a bodies rate balance stay balanced
A
- fluid loss has to be equalled by fluid gain - loss from respiration, skin, feces and urine - gain from drink, food and metabolic
4
Q
what does a negative fluid balance mean
A
- likely dehydrated and will need fluid to rehydrate
5
Q
what does the net body water balance mean?
A
- different between fluid gain and loss - maintained for day to day basis due to thirst and hunger drives - balance challenged in periods of high sweat rates
6
Q
what is dehydration?
A
- hypo hydration - deficit grate then daily fluctuation - develop due to inadequate fluid intake relative to fluid losses - sweating and evaporative heat loss control body temp preventing hyperthermia
7
Q
why do we sweat?
A
- heat production in exercise - - consume O2 - hypothalamus senses increase in heat and work - increased blood flow initiating sweating
8
Q
what does sweating prevent?
A
- rises in body temp (hyperthermia) - evaporative cool - removes heat from the body
9
Q
what does sweat loss cause?
A
- reduction of plasma and blood volume - increase plasma osmolality
10
Q
what does hypo hydration impair
A
- 2% and over BM loss can impact body negatively (degrading of aerobic performance, impaired cognitive function)
11
Q
how does dehydration link to performance?
A
- no maintenance of fluid balance and hypo hydration developing = negatively impact physiology performance - hypohydration can cause cardiovascular strain
12
Q
A
