4.5. Energy Continuum Flashcards
1
Q
What does the energy continuum represent?
A
- Shows how the systems interact to provide energy for the resynthesis of ATP.
- It also highlights the dominant energy system at a given time and intensity.
2
Q
What are the energy system threshold points?
A
The point at which one energy system is taken over by another as the predominant energy system to provide energy for the resynthesis of ATP
3
Q
What is OBLA?
A
- Occurs when your body cannot process lactate quickly enough and thus you begin to tire, it lowers pH of the blood, inhibiting enzyme action, stimulating pain receptors and causing muscle fatigue.
- Occurs at 4mmol/L
4
Q
How do intensity and duration affect energy systems?
A
- High intensity/ short duration = ATP/PC and glycolytic systems
- Medium/ low intensity and long duration = aerobic system will be predominant
5
Q
Very high intensity
A
- Duration: 2-10 secs
- e.g. athletic jumps, throws, 100m spring
- ATP/PC system predominant, contributing up to 99% of ATP resynthesis
6
Q
High intensity
A
- Duration: 10 seconds to 3 mins
- e.g. 400m run, 200m freestyle swim
- glycolytic system predominant contributing up to 60-90% of ATP resynthesis
7
Q
Low-moderate intensity
A
- Duration: more than 3 mins
- E.g. marathon, triathlon
- Aerobic system predominant, contributing up to 90% of ATP resynthesis
8
Q
How does intermittent exercise affect energy systems?
A
- Activity where intensity alternates
- e.g. interval training/ games with breaks in play or changes in intensity
9
Q
How do fitness levels affect energy systems?
A
- CV and respiratory fitness will result in better o2 utilisation
- OBLA reached at 50-60% vo2 max for untrained, 85-90% for trained
- Training increases fuel stores and enzyme levels which increases thresholds
- vo2 max = maximum amount of 02 that can be utilised during exercise
10
Q
Other factors that affect energy systems:
A
- recovery periods
- position of player in team games
- tactics
- level of competition
- structure of game
