Anyone wanting to improve their performance on a road bike needs to understand the two key energy production processes: aerobic and anaerobic energy production . Both play a crucial role in training, but the way you train them differs significantly. This article explains how the body generates energy, when each system dominates, and how to design training plans for maximum efficiency.
By Vincent Augustin 3 minutes read time
Published: September 19, 2026
During cycling, the body needs energy to supply the muscles with ATP (adenosine triphosphate). ATP is the universal "fuel source" for cells. This ATP is produced in two different ways:
Aerobic energy production – with oxygen
Anaerobic energy production – without oxygen
The choice of system depends on intensity, duration, and training level.
During aerobic training , ATP is produced in the mitochondria of muscle cells using oxygen. This process oxidizes carbohydrates, fats, and to a lesser extent, proteins.
Characteristics:
Low to moderate intensity (e.g., 60–75% of maximum heart rate)
Prolonged stress (30 minutes to several hours)
Oxygen uptake is sufficient to meet energy needs.
Improving basic endurance
Improvement of cardiovascular function
Increased fat burning and metabolic efficiency
Faster recovery between intense training sessions
Example: A long, moderate ride in hilly terrain or a 2-hour time trial at a low intensity level primarily trains aerobic capacity.
Tip: Zone 2 training: The key to more endurance and performance
Anaerobic energy production generates ATP without oxygen. There are two subforms:
Anaerobic lactic acid (glycolysis)
Glucose is broken down into lactate.
Quickly available, but produces lactic acid → fatigue
Intensity: high (sprints, short climbs, attacks)
Anaerobic alactic acid (ATP-CP system)
Uses creatine phosphate for instant energy
Very short, very intense (5-10 second sprints)
Quick energy for sprints or attacks
Improvement of maximum power and explosiveness
Increased lactate tolerance
Example: A 30-second sprint on the home straight or an attack on a short incline.
| Goal | Dominant system | Training format |
|---|---|---|
| Improve basic endurance | Aerobic | Long drives, Zone 2 training |
| Sprint power & explosiveness | Anaerobic alactic | Short sprints, interval training |
| Increase lactate threshold | Anaerobic lactic acid | Steady-state intervals, high intensity 5–15 minutes |
| Increase VO2max | Aerobic/anaerobic-lactic combined | Intensive intervals, hill climbs |
Conclusion: Road cyclists benefit from a balanced ratio of both systems. Aerobic base training lays the foundation, while anaerobic sessions ensure peak performance.
Only train anaerobically:
→ leads to rapid fatigue, no increase in endurance.
Only train aerobically:
→ Good stamina, but lacking explosiveness and sprinting strength.
Faulty intensity control:
→ Many athletes overestimate their aerobic zone and unconsciously end up in the anaerobic zone, which prolongs regeneration.
70–80% of weekly kilometers are driven at low intensity
Zone 2 training, long base rides
Focus: Cardiovascular system, fat metabolism, regeneration
20–30% of training time at high intensity
Interval training: sprints, short climbs, intense hill climbs
Focus: Lactate tolerance, explosiveness, maximum performance
Tip: Periodized training, in which aerobic and anaerobic sessions are strategically distributed, ensures sustainable performance improvement without overtraining.
For long-term success on a road bike, the balance between aerobic base and anaerobic peak performance is crucial. Those who neglect their base endurance cannot consistently achieve high performance levels. Those who train only aerobically will remain limited during short, intense bursts of activity.
Practical recommendation:
3-4 aerobic sessions per week (Zone 2, long rides)
1–2 anaerobic sessions (sprints, interval training)
Regular performance diagnostics to correctly target personal zones
Understanding these two energy systems allows for targeted training, increased performance, and optimized recovery. Aerobic training forms the foundation, anaerobic training ensures peak performance – together, they take road cyclists to the next level.
Zwischen den Sitzknochen verläuft der Damm – und mit ihm der Nervus pudendus, der für Empfindung im gesamten Genitalbereich zuständig ist, sowie die Arterien, die den Penis mit Blut versorgen. Anders als beim Gehen oder Laufen liegt beim Radfahren ein Großteil des Körpergewichts dauerhaft auf genau dieser schmalen Zone.
Wenn im Radsport über Ernährung gesprochen wird, geht es fast immer um die Stunden rund um die Belastung: wie viele Gramm Kohlenhydrate pro Stunde, welches Gel wann, wie viel Protein nach der Einheit. Das ist wichtig – aber es betrifft, selbst bei ambitioniertem Training, vielleicht zehn bis fünfzehn Prozent Deiner gesamten Nahrungsaufnahme. Die anderen 85 Prozent sind schlicht: Frühstück, Mittagessen, Abendessen, das, was zwischendurch im Kühlschrank steht. Genau dieser Teil entscheidet über Knochendichte, Immunsystem, Hormonhaushalt, Eisenstatus und darüber, wie gut Du drei Trainingsblöcke hintereinander wegsteckst, ohne einzubrechen.
Road cyclists know: nutrition makes all the difference. After discussing the benefits of beetroot juice, powder, and raw beetroot in our last article, today we're looking at a delicious, everyday option – beetroot salad . Read on to find out why it's not only a great meal, but also a smart choice for rides and training .
