General Characteristics of the Energy Systems (Comparison Table)
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A side-by-side comparison of the ATP-CP, lactic acid, and oxygen systems across oxygen need, speed, fuel, capacity, endurance, and power.
Detail
With a particular activity, one or two systems dominate as the provider of energy; the other systems may continue to function as well.
| Characteristic | ATP-CP (Phosphagen) System | Lactic Acid System | Oxygen System |
|---|---|---|---|
| Need for Oxygen | Anaerobic | Anaerobic | Aerobic |
| ATP Production Rate | Very rapid | Rapid | Slow |
| Energy Source | Chemical fuel: CP | Food fuel: glycogen | Food fuels: glycogen (glucose), fats, (very little, if any, protein) |
| Capacity for ATP Production | Very limited | Limited | Unlimited |
| Endurance Capacity | Low | Low | High |
| Power Production | Very high | High | Moderate to low |
| Types of activities* | Explosive, high-power output (sprints, jumps, throws) | Principal source for activities lasting one to three or four minutes | Endurance activities |
| Other | Muscular stores limited | Product: Lactic acid (associated with onset of muscle fatigue) — source's original framing; see Lactic Acid (Glycolytic) System for the 2026 update (lactate is not itself the fatigue culprit) | No fatiguing by-products |
* With a particular activity, one or two systems dominate as the provider of energy. The other systems may continue to function as well.
Key facts
- ATP-CP: anaerobic, very rapid, very high power, very limited capacity, low endurance.
- Lactic Acid: anaerobic, rapid, high power, limited capacity; product is fatiguing lactic acid.
- Oxygen: aerobic, slow, moderate-to-low power, unlimited capacity, high endurance, no fatiguing by-products.
Connections
- ATP-PC (Phosphagen) System — full detail on the phosphagen system.
- Lactic Acid (Glycolytic) System — full detail on the glycolytic system.
- Oxygen (Aerobic) Energy System — full detail on the oxygen system.
- Bioenergetics — Anaerobic vs. Aerobic Energy Production — anaerobic vs. aerobic framing.
Sources
Keep this lesson, or ask how it applies to you.
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