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Exercise Physiology 2230 > LESSON 9 - exercise intensity and metabolism > Flashcards

LESSON 9 - exercise intensity and metabolism Flashcards

1
Q

define the lactate threshold :

A

point is the exercise intensity at which the blood concentration of lactate and/or lactic acid begins to increase rapidly

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2
Q

what are the four sources of ATP resynthesis ?

A
  • ATP
  • PCr
  • glycolysis/glycogenesis
  • oxidative phosphorylation
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3
Q

what are the three exercise intensity domains ?

A
  • moderate
  • heavy
  • severe
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4
Q

what is the name of the moderate exercise intensity domaine ?

A

rest

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5
Q

what is the name of the heavy exercise intensity domaine ?

A

lactate threshold

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6
Q

what is the name of the severe exercise intensity domaine ?

A

critical power

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7
Q

what domain do you hit right before achieving that VO2 max ?

A

critical power (severe)

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8
Q

what are the two metabolic boundaries that define “exercise intensity” ?

A

lactate threshold and critical power

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9
Q

what is the term defined as “the highest metabolic rate (or VO2) at which blood lactate can be maintained at resting levels” ?

A

lactate threshold

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10
Q

what is the term defined as “the highest VO2 at which oxidative metabolism can provide all the ATP synthesis requirements” ?

A

critical power

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11
Q

what separates moderate from heavy intensity exercise domains ?

A

“comfortable sustainable” from “uncomfortably sustainable”

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12
Q

what separates heavy from severe intensity exercise domains ?

A

“uncomfortable sustainable” from “uncomfortably unsustainable”

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13
Q

what are the two contributions of “aerobic” systems ?

A

Phosphocreatine and glycolysis

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14
Q

what is sub maximal exercise ?

A

ex. going for walk, no muscle cramps, not crazy occurring yet

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15
Q

when do muscle cramps occur ?

A

with lactic acid buildup

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16
Q

FILL IN THE BLANK

_____________ efficiently sustains all the ATP resynthesis once steady state is achieved

A

oxidative phosphorylation

17
Q

FILL IN THE BLANK

if exercise is “easy” this also means that it is ________

A

sustainable

18
Q

what is the energy source in stead state of moderate intensity domain ?

A

aerobic

19
Q

what is the energy source in stead state of heavy intensity domain ?

A

aerobic

20
Q

what is the energy source in stead state of severe intensity domain ?

A

aerobic + anaerobic

21
Q

what is the average exercise duration for moderate exercise intensity domain ?

A

hours

22
Q

what is the average exercise duration for heavy exercise intensity domain ?

A

up to 60 mins or more

23
Q

what is the average exercise duration for severe exercise intensity domain ?

A

2-30 minutes

24
Q

what is the upper boundary for moderate exercise intensity domain ?

A

lactate threshold

25
Q

what is the upper boundary for heavy exercise intensity domain ?

A

critical power

26
Q

what is the upper boundary for severe exercise intensity domain ?

A

VO2 max

27
Q

is VO2 at a steady state during the moderate exercise intensity domain ?

A

yes

28
Q

is VO2 at a steady state during the heavy exercise intensity domain ?

A

yes

29
Q

is VO2 at a steady state during the severe exercise intensity domain ?

A

no

30
Q

is lactate at a steady state during the moderate exercise intensity domain ?

A

N/A (lactate does not change from resting concentration)

31
Q

is lactate at a steady state during the heavy exercise intensity domain ?

A

yes

32
Q

is lactate at a steady state during the severe exercise intensity domain ?

A

no

33
Q

TRUE OR FALSE ?

all metabolic pathways work together and simultaneously ?

A

TRUE

34
Q

TRUE OR FALSE ?

the two metabolic boundaries create three exercise intensity domains ?

A

TRUE

35
Q

TRUE OR FALSE ?

exercise in the different intensity domains require different contributions of the metabolic pathways to provide the needed energy

A

TRUE

36
Q

which of the three exercise intensity domains is defined as the following :

  • no metabolic & physiological steady state
  • oxidative & anerobic
  • progressively worsening efficiency
  • muscle & blood lactate accumulation
  • accumulating acidoses
A

severe

37
Q

which of the three exercise intensity domains is defined as the following :

  • rapid metabolic & physiological steady state
  • all oxidative
  • high efficiency
  • no muscle & blood lactate change
  • no acidosis
A

moderate

38
Q

which of the three exercise intensity domains is defined as the following :

  • delayed metabolic & physiological steady state
  • all oxidative (anaerobic until steady state achieved)
  • reduced efficiency
  • elevated but stable muscle & blood lactate
  • slight, stable acidosis
A

heavy

Exercise Physiology 2230 (21 decks)

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