Domains of exercise

Question 1

What is a domain of exercise?

Answer 1

The boundary between the severity of exercise

Question 2

What speed is associated with the MLSS?

Answer 2

19.5 km/h

Question 3

What is critical power?

Answer 3

The theoretical power output that the athlete should be able to maintain indefinitely

Question 4

What is the process of finding critical power?

Answer 4

1. Set the athlete to do a very hard exercise and time how long they can do it for
2. Send them home and come in the next day and do the same thing for a slightly lower power
3. Do this until the athlete can do the exercise for 30 minutes
4. Plot the hyperbolic graph, critical power is the x-axis asymptote.

Question 5

What variables must be in a steady state for critical power?

Answer 5

• VO2
• Blood lactate concentration
• Heart rate
• “Fatigue products”
• “Musclec cell physiology”

Question 6

What is critical power related to?
Power at:
1. Lactate threshold
2. Lactate turnpoint
3. MLSS
4. VO2max

Answer 6

3 & 4, lactate turnpoint is an estimation of MLSS as well

Question 7

What is W’?

W Prime

Answer 7

“Power above CP” x “Duration”, that corresponds to a fixed energy store mainly represening anaerobic capacity

Question 8

Where does the energy above critical power come from?

Answer 8

• PCr, glycolysis
• Small contribution from myoglobin and haemoglobin stores
• Once these are used, fatigue kicks in and exercise stops

Question 9

An athlete can maintain a power output of 600W for 30s, CP is 300W. How long can they exercise at 400W for?
1. ~ 25s
2. ~ 45s
3. ~ 60s
4. ~ 90s

Answer 9

~ 90s, W’: 300 x 30 = 9000 J
9000 / 100 = 90s

Question 10

A : W’ = 8000 J and CP = 300 W
B : W’ = 9000 J and CP = 280 W
Which athlete is more likely to win a time trial over 40km?

Answer 10

A : Higher CP means better at endurance events

Question 11

What can we do with knowledge of CP?

Answer 11

• Power zones: Training zones
• Who is the fittest athlete
• Athlete tracking over season