# Exercise Physiology 2 - use lecture graphs

version from 2017-11-06 13:57

## Section 1

power/velocity vs durationstart at max power and see how long they can maintain it for. then after resting period, repeat again at lower intensity each time,measuring time they can maintain it for until you get to the power they can maintain for 20/30mins.
what is critical power (CP)Highest power output that can be maintained over time. homeostasis is key, can only be maintained if kept in equilibrium.
What is critical power related to?maximum lactate steady state.
What does W prime show anaerobic energy store
how do you calculate W prime'supra-CP work rate' (higher than CP) X duration. W= Power (w) X time (s)
What does the area above CR represent Fixed energy store that mainly represents anaerobic capacity. Anaerobic energy store.
Fixed energy store that mainly represent anaerobic capacity; what contributes. – PCr, glycolysis (->lactate) – Small contribution from myoglobin and haemoglobin-bound O2 stores. – Once depleted / speed of required energy production exceeded -> exhaustion – However, fatigue-related products may contribute, too (for example, H+)
Athlete A can maintain a power output of 600 W for 30 s, and his/her CP has been estimated at 300 W. How long will this athlete be able to exercise at 400 W?W'= 300W x 30 s = 9000j. 9000j/100w=90s
Athlete A can maintain a power output of 620 W for 30 s, and the CP has been estimated at 300 W. Athlete B can maintain a power output of 500 W for 45 s, and the CP has been estimated at 280 W. Which athlete will win a time trial over 40 km?trick. time trial- W' not really important. Athlete A has a higher critical power so A would win.
Critical power- practical applications • Characterisation of athletes: what is highest sustainable power? • Power zones: training prescription • Athlete tracking over season / training cycle
Low intensity domain Below the LT; BLa < 2 mmol/L; < 70 % Vሶ O2max; steady state in < 3 min
Moderate domain Between the LT and the MLSS / critical power; BLa elevated but stable at 2 to 8 mmol/L; 70-90 % Vሶ O2max; steady state delayed.
Severe domain (interval): Above the MLSS ; critical power; BLa > 2-8 mmol/L; > 90 % Vሶ O2max; steady state not attainable.