Water Flashcards

1
Q

What are the functions of water?

A
  1. Regulates body temperature
  2. Transports nutrients, glucose and oxygen to all the cells in the body via blood plasma
  3. Removes waste
  4. Required for expiration (moistens the air passages)
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2
Q

What happens to fluid in the body durning exercise?

A
  1. Exercise leads to exothermic reactions which produce heat
  2. Sweating then occurs to prevent over heating
  3. Loss of water causes a reduction of blood volume and an increased blood viscosity
  4. Leads to a reduction in blood flow
  5. Cardiac activity increases in order to transport the same amount of O2 around the body to working muscles
  6. Blood flow to the skin is reduced (vasoconstriction) to prevent further water loss
  7. As a result core body temperature increases leading to fatigue
  8. Fluid loss which exceeds 3-5% of body weight, negatively effects performance by:
    -decreasing aerobic performance
    -decreasing reaction time
    -decreasing concentration
    -decreasing decision making
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3
Q

Where are electrolytes found?

A

Blood plasma

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4
Q

What is the function of electrolytes?

A

Key for the electrical transmission of nerve impulses that control muscular contraction

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5
Q

Name 3 important electrolytes

A

Sodium
Potassium
Chlorine

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6
Q

What can loss of electrolytes lead to?

A

-muscle weakness and fatigue
-muscle cramps
-impaired decision making and drowsiness
-abnormal heart rhythm due to cardiac interference

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7
Q

How much should you drink 2 hours before exercise?

A

400-600ml

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8
Q

How much should you drink 15 mins before exercise?

A

200-300ml

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