Firstly, what is energy? When referring to energy within the body, we called it ATP which stands for Adenosine Triphosphate. It is the body's 'energy currency.' Here's what it looks like:
So, our bodies need this ATP to power movement. But, did you know that our body's can theoretically provide energy indefinitely? They do this with 3 energy providing systems:
1. The ATP-PC System
Used for short, powerful bursts of exercise
Lasts <10 seconds
High Intensity
Example: 100m sprint
2. Anaerobic Glycolysis or Lactic Acid System
Used for medium length exercise that causes that burning feeling!
High Intensity
Lasts 30 seconds - 3 minutes
Examples: weight-lifting, circuit training, 400m race
3. Aerobic System
Used for long distance exercise
Lasts 3+ minutes up to indefinite
Low Intestity
Example: marathon, riding, swimming
Why is the Aerobic system "unlimited?"
It uses Oxygen
It takes longer to "warm up"
And with fuel and no injuries, theoretically it could continue indefinitely !
Lastly, our 3 energy systems work together! At the beginning of exercise, ALL 3 energy systems are providing ATP, just in difference proportions. They way they work together is called Energy System Continuum or Interplay. This diagram shows the dominant system over time.
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Thanks legends!
Mr D, your online PE Buddy
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