Endurance Performance

Question 1

What is endurance performance?

Answer 1

The capacity sustain a given speed for the longest possible time

Question 2

What are limitations for middle distance events?

Answer 2

power & anaerobic capacity of energy pathways

ability to tolerate metabolic acidosis

Question 3

What are limitations for long distance events?

Answer 3

availability of metabolic substrate

ability to regulate core body temp

Question 4

Physiological factors relating to endurance running (4)

Answer 4

Maximal oxygen uptake

Running economy

Fractional utilization of 02 uptake

Oxygen uptake kinetics

Question 5

What do the 4 physiological factors of endurance running determine?

Answer 5

Average race pace

Question 6

What is the maximal rate ATP can be resynthesized through aerobic pathways in elite man/female athletes

Answer 6

Male - 70-85 ml.kg-1/min-1

Female - 60-75 ml.kg-1/min-1

Question 7

Which event has the highest maximal oxygen uptake?

Answer 7

5000m

1500m lower because more anaerobic

marathon lower because lower intensity

Question 8

How is maximal oxygen uptake assessed?

Answer 8

A step incremental test to exhaustion

1 km/hr ^ every 3 mins

also a constant speed test with increasing gradient can be used

Question 9

Running economy definition

Answer 9

oxygen cost of running a certain speed or distance

Question 10

How to calculate running economy for a distance

Answer 10

oxygen uptake sub lactate threshold measured (ml.kg/min)

divide by speed (km/min)

= mL.kg/km

lower the better, 200 is average

Question 11

Why is having a lower value for running economy good?

Answer 11

lower VO2 used for a given speed

less muscle glycogen utilisation

less anaerobic glycolysis

less metabolic acidosis

Question 12

How to calculate running speed at VO2 max

Answer 12

divide maximal oxygen uptake by running economy value

max O2 x body weight / RE = x km/h

Question 13

What determines how close you can run to your V02 max

Answer 13

occurrence of lactate threshold & turn point (second spike w/ continuous increase)

these can be mapped on a lactate profile

Question 14

Normal compared to elite athletes lactate threshold as a % of VO2 max

Answer 14

normal - 50-70%

elite - 80-85%

Question 15

Why is lactate profile test (3 min step incremental test) good?

Answer 15

Gives lots of data:

Maximal oxygen uptake (MOU)

Lactate threshold & turnpoint

Running economy

Running speed @ MOU