Strength Training Frequency for Endurance Athletes: A Scientific Guide and Practical Recommendations

Strength training frequency is an important factor influencing endurance sports performance. This article introduces scientifically based frequency settings and practical recommendations.

Defining Strength Training Frequency

Strength training frequency refers to the number of days or sessions of strength training performed per week. For endurance athletes, frequency must strike a balance between strength development and endurance training.

Recommended Strength Training Frequency

Based on Training Phase

Base Phase (6-10 weeks)

Recommended: 2-3 sessions/week

Rationale:

• Establish a strength foundation
• Provide adequate training stimulus
• Allow sufficient recovery time

Scheduling:

• Full-body training: 2 sessions/week (Monday, Thursday)
• Upper/lower body split: 3 sessions/week (Monday lower body, Wednesday upper body, Friday lower body)

Session Duration:

• 45-60 minutes

Strength Phase (4-8 weeks)

Recommended: 2 sessions/week

Rationale:

• Focus on power and sport-specific training
• Reduce training volume to focus on endurance
• Maintain strength while developing endurance

Scheduling:

• Monday and Thursday
• Upper/lower body split training

Session Duration:

• 40-50 minutes

Competition Phase (4-12 weeks)

Recommended: 1-2 sessions/week

Rationale:

• Maintain rather than develop strength
• Prioritize endurance and race-specific training
• Shorter, more focused sessions

Scheduling:

• Single session on Monday or Friday
• Or one session each on Tuesday and Friday

Session Duration:

• 30-45 minutes

Recovery Phase (1-3 weeks)

Recommended: 0-1 sessions/week

Rationale:

• Complete recovery
• Prepare for the next training cycle

Frequency Recommendations by Sport

Cyclists

Characteristics:

• Require lower body strength and core stability
• Long training hours

Recommended Frequency:

• Base phase: 2-3 sessions/week (lower body × 2, upper body/core × 1)
• Strength phase: 2 sessions/week (lower body × 1, upper body/core × 1)
• Competition phase: 1 session/week (maintenance training)

Runners

Characteristics:

• Lower body absorbs significant impact
• Require power and stability

Recommended Frequency:

• Base phase: 2-3 sessions/week (lower body × 2, upper body × 1)
• Strength phase: 2 sessions/week (emphasize plyometric training)
• Competition phase: 1-2 sessions/week (maintenance and stability)

Triathletes

Characteristics:

• Full-body training demands
• High training volume

Recommended Frequency:

• Base phase: 2 sessions/week (full-body training)
• Strength phase: 2 sessions/week (sport-specific training)
• Competition phase: 1 session/week (maintenance training)

Full-Body Training vs. Split Training

Full-Body Training

Advantages:

• Fewer training sessions required
• Beginner-friendly
• Each muscle group stimulated 2 sessions/week

Suitable For:

• Beginners
• Limited training time
• Base phase

Example:

Monday: Full-body training
- Squat 3×6-8
- Pull-up 3×6-8
- Leg curl 3×8-10
- Barbell row 3×6-8
- Core training 2×10

Thursday: Full-body training (light)
- Leg press 3×8-10
- Push-up 3×8-10
- Hamstring curl 3×10-12
- Cable row 3×10
- Core training 2×10

Upper/Lower Body Split

Advantages:

• More work per individual muscle group
• Better recovery
• Allows for higher training intensity

Suitable For:

• Intermediate trainees and above
• Strength phase
• Sufficient training time available

Example:

Monday (Lower Body Day):
- Squat 4×5-6
- Hip thrust 3×8
- Leg curl 3×10
- Lateral lunge 3×10

Wednesday (Upper Body Day):
- Pull-up 3×6-8
- Barbell row 3×6-8
- Overhead press 3×6-8
- Biceps curl 3×10

Friday (Core and Functional):
- Single-leg Romanian deadlift 3×8
- Woodchop 3×10
- Plank variations 3×45 seconds

Push/Pull/Legs Split

Advantages:

• More refined muscle group division
• Highest training intensity
• Optimal recovery

Suitable For:

• Advanced trainees
• Periodized training
• Ample training time

Disadvantages:

• Requires 3 sessions/week or more
• Competes with endurance training

Training Frequency and Recovery

Neuromuscular Recovery

Muscle Recovery Time:

• Light to moderate training: 24-48 hours
• High-intensity training: 48-72 hours
• Complete neuromuscular recovery: 72-96 hours

Best Practices:

• Allow at least 48 hours between high-intensity sessions
• Different muscle groups can be trained more frequently
• Allow a minimum of 48 hours between sessions for the same muscle group

Recovery Factors

1. Sleep: 7-9 hours/night
2. Nutrition: Adequate protein and carbohydrates
3. Stress Management: Reduce psychological stress
4. Active Recovery: Light exercise, stretching, massage

Training Frequency by Intensity

High-Intensity Strength Training (1-6RM)

Recommended: 1-2 sessions/week

• High neurological fatigue
• Requires full recovery
• Not suitable for beginners

Moderate-Intensity Hypertrophy Training (6-12RM)

Recommended: 2-3 sessions/week

• Balances stimulus and recovery
• Most suitable for endurance athletes
• 2 sessions/week per muscle group is ideal

Low-Intensity Muscular Endurance Training (12-15+RM)

Recommended: 2-3 sessions/week or more

• Low recovery demands
• Aerobic in nature
• Can be combined with endurance training

Coordinating Strength Training Frequency with Endurance Training

Weekly Training Distribution Examples

Base Phase Weekly Example:

Monday: Strength (lower body) + light aerobic
Tuesday: Aerobic training (moderate intensity)
Wednesday: Strength (upper body + core)
Thursday: Aerobic training (moderate intensity)
Friday: Strength (functional) + light aerobic
Saturday: Aerobic training (long distance)
Sunday: Rest or recovery

Strength Phase Weekly Example:

Monday: Strength (lower body power) + light aerobic
Tuesday: Aerobic training (high-intensity intervals)
Wednesday: Strength (upper body strength)
Thursday: Aerobic training (moderate intensity)
Friday: Functional and core training
Saturday: Aerobic training (long distance)
Sunday: Rest

Competition Phase Weekly Example:

Monday: Strength (maintenance training, light)
Tuesday: Aerobic training (high intensity)
Wednesday: Rest
Thursday: Aerobic training (moderate intensity)
Friday: Core and functional training
Saturday: Race or long distance
Sunday: Recovery

Progression of Training Frequency

Beginners (0-3 months)

Starting Frequency: 2 sessions/week

• Full-body training
• Learn proper technique
• Build habits

Novice (3-6 months)

Progress to: 2-3 sessions/week

• May try an upper/lower body split
• Increase training intensity
• Improve muscular coordination

Intermediate (6-12 months)

Progress to: 2-3 sessions/week (depending on training phase)

• Periodized training
• Refined split routines
• High-intensity training

Advanced (12+ months)

Individualized Frequency: 1-3 sessions/week

• Adjust according to the endurance training cycle
• May require relatively lower strength training frequency

Monitoring Adaptation and Making Adjustments

Tracking Metrics

1. Strength Progress: Training load and repetitions
2. Endurance Performance: Speed, power, heart rate variability
3. Recovery Indicators: Sleep quality, muscle soreness, fatigue levels
4. Body Composition: Body fat, muscle mass

When to Adjust Frequency

Signals to Increase Frequency:

• Performance progress has stalled
• Adequate recovery
• Still feeling energetic

Signals to Decrease Frequency:

• Excessive fatigue
• Insufficient recovery
• Declining endurance performance
• Injury or soreness

Common Frequency-Related Mistakes

Mistake	Consequence	Correction
Overtraining (4+ sessions/week)	Excessive fatigue, decreased performance, injury	Reduce to 2-3 sessions/week
Undertraining (1 session/week)	Slow progress, insufficient adaptation	Increase to 2-3 sessions/week
Never deloading	Accumulated fatigue, decreased performance	Schedule a deload week every 4-5 weeks
Neglecting recovery	Increased injury risk	Prioritize sleep, nutrition, and rest

Conclusion

Strength training frequency is a key factor in optimizing endurance athletes’ performance. Based on scientific evidence, 2-3 strength training sessions per week is most suitable for the majority of endurance athletes, particularly during the base phase. As training progresses and the competition season approaches, frequency can be gradually reduced to 1-2 sessions per week. By adjusting frequency according to training phase, recovery capacity, and endurance training demands, athletes can achieve an optimal balance, reaping the dual benefits of strength development and endurance performance.

Related Reading

• Periodized Strength Training for Endurance Athletes: A Scientifically Integrated Training Plan
• Strength Training Frequency for Runners: How Many Sessions Per Week Are Most Effective
• The Effect of Strength Training Frequency on Muscle Hypertrophy: A Meta-Analysis of 1 vs. 5 Sessions Per Week
• How to Maintain Hard-Earned Off-Season Strength During the Season (Just Once a Week)