7.1 Energy for Exercise 2 Flashcards
What is ATP-PC/ glycolytic threshold
-give example
-e.g. netballer WA sprints out to receive centre pass over 3-4 secs -> ATP-PC system
-losing possession -> man-man marking for period of a minute -> glycolytic systems takes over
What is glycolytic/ aerobic threshold
-give example
after goal is scored in netball, player jogs back in position ready for next centre
-intensity significantly reduced -> sufficient oxygen for aerobic system to take over
Why is recovery periods such as quarter and half time breaks in basketball and netball beneficial
-these sports rely on ATP-PC & glycolytic systems
–tho PC stores deplete in 8s -> replenished after 3 mins
-also oxygen stored in myoglobin -> depleted after bouts of exhuastive exercise -> replenished after 3 mins
-so these breaks aid recovery & maintain intensity of game
Name the 4 benefits of quater and half time breaks within sport
-aid recovery -> oxygen & energy stores can be replenished
-allow for rehydration
-allow for glycogen/ glucose replenishment
-lactic acid build up can be reduced
Why is quarter and half time breaks beneficial in helping reduce rising blood lactate levels
-lactic acid removal is aided by low-intensity activity -> which maintains blood flow &oxygen transport
-lactic acid levels rise durimg high intensity bouts & fall during relief intervals
-this prolongs the duration of an activity
What is VO2 max
it is the max volume of oxygen taken, utilised, consumed by working muscles per minute
What happens to OBLA as fitness increases and why is this beneficial
as fitness increases you delay OBLA
-due to trained athletes being able to utilise much more of their VO2 max
-increasing their ability to tolerate lactic acid, remove waste products & supply O2 to working muscles
-allowing them to exercise for longer and at a higher intensity
Name 4 factors in which affect the duration and effectiveness of recovery
-type of energy system used for exercise
-original fitness level of the player
-position of the player
-tactics and strategies used
ATP-PC SYSTEM
-energy source
-site of reaction
-intensity
-duration
-energy yield
-catalyst enzyme
energy source- phosphocreatine
site of reaction- sarcoplasm
intensity- high
duration- 0-10s
energy yield- 1:1
catalyst enzyme- ATPase, Creatine Kinase
Glycolytic
-energy source
-site of reaction
-intensity
-duration
-energy yield
-catalyst enzyme
-energy source- glycigen, glucose
-site of reaction- sarcoplasm
-intensity- high mdoerate
-duration- 10s - 3mins
-energy yield- 2:1
-catalyst enzyme- PFK, LDH
Aerobic system
-energy source
-site of reaction
-intensity
-duration
-energy yield
-catalyst enzyme
-energy source- glycogen, fat
-site of reaction- mitochondria
-intensity- moderate, low
-duration- 3 mins +
-energy yield- 38: 1
-catalyst enzyme- PFK, GPP
Explain the 3 stages in the krebs cycle
stage 1 -> ACETYL COA -> produced from breakdown of glucose combines with OXALOACETIC ACID -> citric acid
stage 2 -> citric acid is oxidised through
