lecture 32

Question 1

what does training do to lactate threshold power

Answer 1

increase threshold

Question 2

if testing lactate what must you consider?

Answer 2

mode, intensity, time @ intensity, prior activity, hydration, nutrition and temp.

Question 3

how does hydration effect lactate

Answer 3

dehydrated = more lactate

Question 4

what is lactate a marker of?

Answer 4

lactate is just a marker of rate of anaerobic glyolysis relative to oxidative metabolism, and of ability to clear lactate from blood.

Question 5

what influences lactate production?

Answer 5

increase oxygen supply, increase o2 utilisation, change in fibre type recruitment, decrease catecholamines and increase fat usage.

Question 6

what influences lactate clearance

Answer 6

increase in o2 supply, increase in capillarisation, increase in mitochondrial density, increase in la shuttle, increase in core cycle

Question 7

how to train lactate threshold

Answer 7

some high intensity interval training to increase lactate and stimulate clearance.

Question 8

how does increase in fuel availability improves endurance with training.

Answer 8

increase storage (CHO and triglycerides), increase uptake and synthesis (both glucose and FFA) decrease reliance on blood glucose and muscle glycogen.

Question 9

how does decrease in accumulation of lactate and hydrogen improve endurance

Answer 9

change in LDH subtype
increase NADH shuttles into mitochondria
increase ATP (less ADP therefore less PFK activation)

Question 10

how does thermoregulation improve endurance w training.

Answer 10

increase sweat rate power and capacity. increase skin blood flow at given absolute or relative intensity.

Question 11

how does a more favourable body composition help improve endurance.

Answer 11

decrease adipose tissue fat (more economy and heat loss, less heat gain).

Question 12

what structural adaptations improve endurance

Answer 12

INCREASE IN bone density ( in loaded bones/limbs) and cartilage, tendon and ligaments

Question 13

does gut microbiome effect endurance

Answer 13

yes, lactate seems beneficial.

Question 14

what adaptations take years to become measureable

Answer 14

HRmax, left ventricle mass, economy and bone density.

Question 15

what adaptations takes days to become measureable

Answer 15

glucose sensitivity, glycogen storage, skeletal m antioxidant capacity, cardiac antioxidant capacity.