Test Final- Temperature/ Altitude adaptations

Question 1

Acclimitization in heat

Answer 1

• exercise in heat 10-14 days
• Increased plasma volume + capacity to sweat
• increased VO2max, Qmax, LT
• lower body temp +hr responses
• less NA+ lost

Question 2

T/F- inverse relationship b/w VO2 and body fatness

Answer 2

-T

Question 3

VO2 and core temp in fat and thin men

Answer 3

thin- Increased Vo2 and decreased core temp (subcutaneous fat is good insulator)

Question 4

Fuel use during shivering

Answer 4

• fat primarily used

- shivering can lead to muscle glycogen depletion

Question 5

Hypoxia, Normoxia, Hyperoxia

Answer 5

Hypoxia- low PO2(altitude)

Normoxia- Normal PO2

Hyperoxia- High PO2

Question 6

Effects of altitude on performance (short/long)

Answer 6

short- low PO2 should have no effect on performance
- lower air resistance may increase performance

long term- low pO2 results in poorer aerobic performance
- Dependent on O2 delivery to muscle

Question 7

Max aerobic power @ altitude ( med and high)

Answer 7

med- low VO2 mx due to lower astrial po2

high- Vo2 max low also due to low Q max, low max HR

Question 8

acclimatization to high altitude

Answer 8

• increased RBC production
• increased Hgb conc (EPO hormone)
• Increased O2 saturation (due to increased BF to lungs)

Question 9

what does hyperventilation do at high altitudes

Answer 9

• drives down PO2 + H+ in blood

- allows more O2 to bind with Hbg

Question 10

Live high/ Train high

Answer 10

live/train at moderate altitude

Question 11

live high/train low

Answer 11

• 2000-2500 is required for blood change
• elicits increase in RBC via EPO
• min 12hr/day

Question 12

best training method

Answer 12

Live high train low is best method to increase o2 carrying capacity

Question 13

Lactate paradox

Answer 13

• exposure to altitude- increases HR, VE, Lactate

after acclimitization- lactate response decreases despite hypoxia

• same hypoxic stim but less lactate