The half marathon on the Concept2 erg (21,097 meters) is one of the most demanding endurance challenges in indoor rowing. At 75-90 minutes for most rowers, it requires serious aerobic development, careful pacing, and the mental fortitude to keep pulling when everything hurts.
This 12-week plan takes you from solid base fitness to race-ready for 21,097m.
What It Takes to Row a Half Marathon
The half marathon is 98%+ aerobic. There is no anaerobic component to worry about; this is pure engine size and efficiency. The challenge is maintaining technique and focus for over an hour of continuous rowing.
Prerequisites: You should be comfortable rowing 10K continuously before starting this plan. If you can't yet row 10K without stopping, build to that first.
Pacing Strategy
The most important rule: start slower than you think you should.
- First 7000m: Target pace + 2 seconds. This should feel easy.
- 7000-14000m: Target pace. Settle in.
- 14000-19000m: Target pace. Hold.
- Final 2000m: Whatever you have left.
Predict your half marathon pace from a shorter test using our distance predictor.
The 12-Week Plan
Weeks 1-4: Base Building
Goal: Build weekly volume to 60,000-70,000m.
Typical week (4-5 sessions):
- 3x long steady state: 50-70 min at UT2
- 1x UT1 tempo: 3 x 20 min at UT1, 3 min rest
- Optional: easy 30 min
Weeks 5-8: Endurance Extension
Goal: Extend long session duration. Weekly long row builds toward race distance.
Typical week (4-5 sessions):
- 1x long row: build from 12K to 16K to 18K at UT2 pace (one per week, progressive)
- 2x steady state: 45-50 min at UT2
- 1x UT1 tempo: 2 x 25 min at UT1, 3 min rest
- Optional: easy 20 min
Weeks 9-11: Race Specificity
Goal: Practice race pace for extended durations.
Typical week (4 sessions):
- 1x long row: 16-18K at target HM pace
- 2x steady state: 40-45 min at UT2
- 1x race-pace intervals: 4 x 3000m at HM target, 3 min rest
Week 12: Taper + Race
- Monday: 30 min easy
- Wednesday: 5K at HM pace (confidence builder)
- Friday: 15 min very easy
- Saturday or Sunday: Half marathon
Race Day Logistics
- Hydration: Have water within reach. Take small sips every 15-20 minutes.
- Nutrition: For efforts over 60 minutes, consider a small energy gel at the 45-minute mark.
- Entertainment: Many rowers listen to music or podcasts. It helps. Set up before you start.
- Damper setting: Use your normal setting. Don't change it for race day.
Fueling and Recovery
Long sessions deplete glycogen significantly. After any row over 60 minutes:
- Eat within 30 minutes (carbs + protein)
- Rehydrate fully
- Take the next day easy or off
Check your calorie burn to understand your energy expenditure.
Generate Your Personalized Half Marathon Plan
ErgManiac's AI coach creates progressive half marathon plans based on your current endurance level and available training time.