How to Complete the 100K Erg Challenge

Understanding the Challenge

One hundred thousand metres on the erg takes approximately 6-10 hours depending on fitness and pacing. It is more than twice a marathon distance and requires fundamentally different preparation. The physical demands are substantial but manageable with correct pacing — the real challenge is mental. Boredom, discomfort, and the desire to stop are your primary opponents. Many who attempt 100K have the fitness but lack the preparation for the non-physical elements.

Training Build-Up

Preparation should span 16-20 weeks. Build your longest single session progressively: start at 60 minutes, add 15 minutes per fortnight until you reach 3-4 hours. You do not need to row 100K in training — reaching 50-60K in a single session is sufficient preparation. Supplement long rows with regular 40-60 minute steady state sessions 3-4 times per week. Total weekly volume should peak at 80-100K metres before tapering.

Pacing and Execution

Pace conservatively — your 100K split should be 20-30 seconds per 500m slower than your 2K pace, or your comfortable UT2 pace. Start the first 20K at a pace that feels genuinely too easy. Settle into your target from 20-80K. Push only in the final 10-20K if you feel good. Break the distance into 10K segments and set a mini-target for each. Stop the erg for brief breaks (2-3 minutes every 20-25K) to stand, stretch, eat, and use the bathroom.

Fuelling, Hydration, and Comfort

You will need to consume 200-300 calories per hour from easily digestible sources: energy gels, bananas, jelly sweets, or diluted sports drink. Sip water every 10-15 minutes. Seat comfort is the biggest physical challenge — use a padded seat cover and wear cycling shorts. Apply anti-chafe cream to any friction points before starting. Set up a table within reach with all your nutrition, water, and entertainment.

Mental Strategies

The 100K is a mental marathon. Use a combination of strategies: segment the distance (10 x 10K), set mini-rewards at each checkpoint, alternate between music, podcasts, and silence. Have a support person present if possible — even just someone checking in every hour helps enormously. Accept that there will be low points (typically around 40-60K) and that they pass. Do not make decisions about quitting during a low point — commit to reaching the next checkpoint first.

Tips

• +Do at least two 3-4 hour training rows in the final month to test your fuelling, seating, and mental strategies.
• +Prepare all nutrition and hydration before you start. Stopping to prepare food mid-row breaks rhythm and wastes time.
• +Set up entertainment in advance — queue playlists, download podcasts, and have a backup plan if technology fails.
• +Wear cycling shorts and use a gel seat pad. Seat soreness ends more 100K attempts than fitness does.
• +Tell someone what you are doing. Accountability makes it harder to quit, and someone checking in at 60K is invaluable.

Further Reading

• Concept2 Training Resources — Official training guides and workout of the day from Concept2.
• British Rowing — Indoor Rowing — Training plans and resources from the national governing body.
• Concept2 Rankings — Global erg rankings by distance, age, and weight category.

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