Cyclists’ Off-Season Training: How to Maintain Base Fitness in Winter

After the season ends, many riders fall into two extremes: stopping training completely or forcing themselves to maintain race-season intensity. Both are mistakes. The correct winter training strategy should involve a planned reduction in intensity, rebuilding the base, and laying a stronger foundation for the next season.

The Physiological Basis of Winter Training

Why Do You Need a “Base Period”?

The body’s adaptation mechanisms require specific stimulus patterns. Long-term high-intensity training leads to:

• Accumulated nervous system fatigue: Slower reaction times, reduced coordination
• Endocrine system imbalance: Persistently elevated cortisol, decreased testosterone
• Mental burnout: Reduced motivation, inability to maintain training quality

Winter base training provides the body with an opportunity to recover and rebuild, while maintaining sufficient training stimulus to avoid detraining effects.

The Timeline of Detraining Effects

Time Off Training	Primary Effects
1-2 weeks	VO2max begins to decline (approximately 5-7%)
3-4 weeks	Muscle strength and endurance decline by approximately 10%
6-8 weeks	Heart chamber volume decreases, aerobic capacity significantly declines
12+ weeks	Requires rebuilding from near-zero training volume

Therefore, completely stopping training for more than 2 weeks produces significant negative effects.

The Four Pillars of Winter Training

1. Low-Intensity Aerobic Base (Zone 2 Training)

Winter should focus primarily on Zone 2 aerobic riding, comprising 70-80% of total training volume.

Zone 2 Definition:

• Heart rate: 60-70% of maximum heart rate
• Perceived exertion: Can easily speak in full sentences
• Power: 55-75% of FTP
• Metabolic profile: Fat as the primary fuel source

Why Is Zone 2 So Important?

Zone 2 training effectively enhances mitochondrial density and efficiency, which is the fundamental basis of endurance performance. Many professional riders center their winter training around high-volume, low-intensity work, reaching 20-30 hours per week, but at very low intensity.

2. Integrating Strength Training

Winter is the golden period for adding weight training, as it won’t interfere with the high-intensity training plan during the race season.

Recommended Exercise List:

Exercise	Sets/Reps	Target Muscle Groups	Frequency
Squats	4x6-8	Quadriceps, glutes	2x per week
Single-leg squats	3x8-10	Balance, stability	2x per week
Deadlifts	3x6-8	Posterior chain	1-2x per week
Step-ups	3x10-12	Climbing muscles	2x per week
Core training	Daily	Stability	Daily

Important Note: Strength training should be performed after rides or on non-riding days to avoid fatigue interfering with riding technique.

3. Indoor Riding (Zwift/Trainer Road)

Taiwan’s winter climate is relatively mild, but the cold, damp weather brought by the northeast monsoon still makes indoor training an important option.

Advantages of Indoor Training:

• Precise control of power zones
• Unaffected by weather
• High time efficiency (no wasted time at red lights, descents, etc.)
• Structured workouts are easy to execute

Sample Winter Indoor Training Plan (Weekly):

Monday: Rest or light core training
Tuesday: 1 hour Zone 2 + 3x10 minutes Zone 3 (sweet spot)
Wednesday: 45 minutes Zone 2 + weight training
Thursday: 1.5 hours Zone 2
Friday: Rest or low-intensity ride
Saturday: 2.5-3 hours Zone 2 long ride (outdoors preferred)
Sunday: Rest or easy ride

4. Technique and Efficiency Improvement

Winter is a great time to improve riding technique, which can be done without high intensity.

Cadence Training:

• Practice high-cadence (90-100 rpm) riding
• Improve neuromuscular efficiency
• Reduce unnecessary muscular effort

Position Adjustment:

• Winter is a great time to get a new Bike Fitting
• There is ample time to adapt to a new position without affecting important races

Special Considerations for Winter Training in Taiwan

Climate Characteristics

The main challenges of winter riding in Taiwan:

• Northeast monsoon: Strong winds and heavy rain in northern Taiwan from November to March, with poor visibility
• Mountain road closures: High-elevation routes may be closed due to low temperatures or road conditions
• Shorter daylight hours: No natural light after work, requiring lights

Regional Recommendations

Region	Winter Conditions	Recommendations
Northern Taiwan (Taipei, Taoyuan)	Rainy, northeast winds	Increase the proportion of indoor training
Central Taiwan (Taichung, Nantou)	Relatively dry	Can maintain more outdoor riding
Southern Taiwan (Kaohsiung, Tainan)	Sunny, warm	Most suitable for winter training
Eastern Taiwan (Hualien, Taitung)	More stable climate	Suitable for long-distance aerobic riding

Transition Strategy from Winter to Race Season

Six to eight weeks before the season begins, gradually introduce intensity training:

8-6 weeks out: Add a small amount of Sweet Spot training (88-93% of FTP)
6-4 weeks out: Begin adding short VO2max intervals
4-2 weeks out: Introduce race-simulation intensity, mixing A/B intensity
2 weeks before racing: Taper, maintaining intensity while reducing volume

Conclusion

Winter training is an invisible investment in building race-season competitiveness. The seemingly monotonous Zone 2 long rides and tedious weight training are all quietly accumulating energy for breakthroughs in the next season. Taiwanese riders have warmer winter training conditions than their European and American counterparts; making good use of this advantage will yield results in spring races.

Related Reading

• Building Base Aerobic Mileage on the Bike: The Importance of Long Winter Rides
• Winter Base Period Training Plan: Building the Fitness Foundation for the Next Season
• Maintaining Winter Fitness on a Road Bike: Indoor Riding and Base Aerobic Maintenance Strategies
• Interval Ratios in the Winter Base Period: How to Preserve Speed in a Low-Intensity-Focused Cycle