Chapter 3: bioenergetics of exercise and training

Question 1

this begins at approx. 50-60% of VO2max

Answer 1

Lactate threshold

Question 2

this occurs when the concentration of blood lactate reaches 4 mmol/l

Answer 2

onset of blood lactate accumulation (OBLA)

Question 3

Total energy yield from the oxidation of one glucose molecule: (slow glycolysis) substrate level phosphorylation

Answer 3

4 (2net gain –> 2 in 4out)

Question 4

Total energy yield from the oxidation of one glucose molecule: (slow glycolysis) oxidative phosphorylation

Answer 4

6

Question 5

Total energy yield from the oxidation of one glucose molecule: (Krebs cycle) substrate-level phosphorylation

Answer 5

2

Question 6

Total energy yield from the oxidation of one glucose molecule: (Krebs cycle) oxidative phosphorylation

Answer 6

24

Question 7

Total energy yield from the oxidation of one glucose molecule: (Krebs cycle) via GTP

Answer 7

4

Question 8

Total energy yield from the oxidation of one glucose molecule: (slow glycolysis, Krebs cycle) total

Answer 8

40 (38 if starting from blood glucose) 38 net gain

Question 9

Primary energy system used (time, intensity): 0-6s, extremely high

Answer 9

phosphagen

Question 10

Primary energy system used (time, intensity): 6-30s, very high

Answer 10

phosphagen and fast glycolysis

Question 11

Primary energy system used (time, intensity): 30s-2m, high

Answer 11

fast glycolysis

Question 12

Primary energy system used (time, intensity): 2-3m, moderate

Answer 12

fast glycolysis, and oxidative system

Question 13

Primary energy system used (time, intensity): >3min, low

Answer 13

oxidative system

Question 14

This has the greatest effect on EPOC

Answer 14

intensity

Question 15

Interval training to train specific energy systems (%of maximum power, typical exercise type, range of work-rest period ratios): phosphagen

Answer 15

90-100%
5-10s
1:12 to 1:20

Question 16

Interval training to train specific energy systems (%of maximum power, typical exercise type, range of work-rest period ratios): fast glycolysis

Answer 16

75-90%
15-30s
1:3-1:5

Question 17

Interval training to train specific energy systems (%of maximum power, typical exercise type, range of work-rest period ratios):fast glycolysis and oxidative

Answer 17

30-75%
1-3m
1:3 to 1:4

Question 18

Interval training to train specific energy systems (%of maximum power, typical exercise type, range of work-rest period ratios):oxidative

Answer 18

20-30%
>3m
1:1 to 1:3

Question 19

Cori cycle

Answer 19

Lactate transported to liver - transported to glucose
this makes your lactate threshold your ability to control the amount of lactate in your body

Question 20

What slows you down as fatigue builds

Answer 20

H ion in blood is what slows you down and builds fatigue