Anaerobic System
The anaerobic system produces energy without oxygen — for explosive, intense efforts. Limited but powerful, it fuels strength and sprints.
Anaerobic system - The explosive energy
Definition
The anaerobic system produces energy without using oxygen. It instantly powers short, intense efforts: sprints, heavy lifts, jumps. Two distinct subsystems make up this pathway.
💡 The anaerobic system delivers fast but burns out fast. It's the dragster vs. the long-distance car (aerobic system).
The 2 anaerobic subsystems
1. ATP-PC system (alactic anaerobic)
Uses phosphocreatine stored in muscle to instantly regenerate ATP. Maximum power, ~10 seconds of duration.
Used for: 100 m sprint, 1RM, jumps, heavy throws.
2. Glycolytic system (lactic anaerobic)
Breaks down glucose without oxygen, producing ATP + lactate as a byproduct. Lasts 30 sec to 2 minutes.
Used for: 400-800 m sprint, hypertrophy sets, mid-distance efforts.
Comparing the energy systems
| System | Duration | Power | Fuel |
|---|---|---|---|
| ATP-PC | 0-10 sec | ★★★★★ | Phosphocreatine |
| Glycolytic | 10 sec - 2 min | ★★★★ | Glucose (no O2) |
| Aerobic | 2 min+ | ★★ | Glucose, fats (with O2) |
Why develop your anaerobic system?
- Stronger and more explosive
- Better short-effort performance
- Higher anaerobic capacity
- Better lactate clearance
- Boosted heart rate, more efficient cardio
How to develop the anaerobic system
For ATP-PC (max power)
- ✅ Heavy lifting: 1-5 reps at 85-100% 1RM
- ✅ Short sprints: 50-100 m all out, 2-3 min rest
- ✅ Plyometrics: jumps, throws, explosive movements
For glycolytic (lactate capacity)
- ✅ HIIT: Tabata, 4x4 bursts
- ✅ Mid-distance sprints: 400-800 m
- ✅ Hypertrophy sets: 8-15 reps with short rest
- ✅ Circuit training / EMOM: high lactate buildup
The myth of lactic acid
⚠️ The anaerobic system produces lactate, NOT lactic acid. Lactate is now considered a useful energy source, not pure waste. The "burn" is caused by H+ ions, not lactate itself.
Key takeaways
The anaerobic system is essential for any lifter: it powers heavy sets and explosive efforts. Develop it via heavy lifting (ATP-PC) and HIIT/hypertrophy (glycolytic). Don't neglect it just because you're not a sprinter.
Termes associés
Training intensity measures the difficulty of effort. Calculate it with % of 1RM, RPE or RIR to adapt your sessions.
ATP is the fundamental energy molecule that powers all muscle contractions and underlies all your sports performance.
Rest time between sets impacts your performance and results. Adapt duration to your goal: strength, hypertrophy or cardio.
The aerobic system uses oxygen to produce energy during prolonged efforts. Improves cardiovascular endurance and stamina.
