20-WEEK IRONMAN 70.3 TRAINING PLAN: WEEKS 9 THROUGH 13
by OXB Staff on Sep 05
20-WEEK IRONMAN 70.3 TRAINING PLAN: WEEKS 9 THROUGH 13

This training plan is designed for those who want to train for a half Ironman. The plan lasts 20 weeks.

Start with 8 weeks of base training, followed by 6 weeks of build-up training and 6 weeks of peak training. On odd-numbered training weeks, you’ll do 3 swimming sessions, 3 bike rides, and 3 runs.
Weeks 2, 6, 10, 14, and 18 include 3 swimming sessions, 2 bike rides, 3 running sessions, and one combined bike-run workout. Weeks 4, 8, 12, 16, and 20 include 3 swimming sessions, 3 bike rides, 2 running sessions, and one combined bike-run workout. There is a rest week every four weeks. The final 10 days constitute a “cool-down” period. The plan begins with 3.5 km of swimming, 2.45 hours of cycling, and 1.45 hours of running per week. The peak is reached in the 17th week with 6 km of swimming, 5.20 hours of cycling, and 3.07 hours of running.

Construction phase
The construction phase begins this week. During this six-week phase, you’ll tackle some intense, high-intensity workouts—including intervals in all three disciplines—to maximize your aerobic capacity and improve your ability to sustain higher speeds. At the same time, you’ll continue to build endurance with long swims, runs, and bike rides.


Week 9

Monday

Rest

Tuesday

Bikes: long, varied routes with elevation changes: 1 h

Warm-up: 10 minutes at moderate aerobic intensity

Workout: 4 sets of 5-minute intensity variations @ maximum VO2 intensity, with 5 minutes of recovery between sets

Cool-down: 10 minutes at moderate aerobic intensity

Wednesday

Basic Swimming: 1.6 km

Warm-up: 300 @ low aerobic intensity

8 x 25 fast, REST = 0:10

Workout: 3 x 100 @ moderate aerobic intensity, RECOVERY=0:05

4 x 75 at VO2 max intensity, REST = 0:45

6 x 25 @ fast intensity, REST = 0:20

8 sets of 25 leg raises, REST = 0:15

Cool-down: 300 @ low aerobic intensity

Duration of variations: 32 minutes

Warm-up: Run for 10 minutes at low aerobic intensity

Workout: 12 sets of 30 seconds at VO2 max intensity with 30-second recovery periods at low aerobic intensity

Cool-down: 10-minute run at low aerobic intensity

Thursday

Bici Basics: 1:15

Warm-up: 10 minutes @ moderate aerobic intensity

Work: 55 minutes @ moderate aerobic intensity

Cool-down: 10 minutes @ moderate aerobic intensity

Friday

Threshold Swimming + Sprint: 1.6 km

Warm-up: 300 @ low aerobic intensity

8 x 25 fast, REST = 0:10

Workout: 3 x 200 @ intensity threshold, REST = 0:45

4 x 50 at fast intensity, REST = 0:20

8 sets of 25 leg raises, REST = 0:15

Cool-down: 300 @ low aerobic intensity

Basics: Running: 45 Minutes

Warm-up: Run for 10 minutes at moderate aerobic intensity

Workout: 25-minute run @ moderate aerobic intensity

Cool-down: 10-minute run at moderate aerobic intensity

Final workout: 6 x 20-second runs at a fast pace, with 40-second recovery periods immediately after completing today’s running workout

Saturday

Bike Ride: 2 hours

Warm-up: 10 minutes at moderate aerobic intensity

Workout: 1 hour and 40 minutes at moderate aerobic intensity

Cool-down: 10 minutes at moderate aerobic intensity

Sunday

Basic Swimming: 1.9 km

Warm-up: 300 @ low aerobic intensity

Workout: 1,500 @ moderate aerobic intensity

Cool-down: 300 @ low aerobic intensity

Basics: 1 Hour

Warm-up: Run for 10 minutes at moderate aerobic intensity

Workout: 40-minute run @ moderate aerobic intensity

Cool-down: 10-minute run at moderate aerobic intensity


Week 10

Monday

Rest

Tuesday

Bike Rides: 1 Hour

Warm-up: 10 minutes at moderate aerobic intensity

Workout: 8 x 3-minute intervals at VO2max intensity on flat or undulating terrain with 2′ of recovery

Cool-down: 10 minutes at moderate aerobic intensity

Wednesday

Basic Swimming: 1.7 km

Warm-up: 300 @ low aerobic intensity

8 x 25 fast, REST = 0:10

Workout: 3 x 100 @ moderate aerobic intensity, RECOVERY=0:05

5 x 75 at VO2 max intensity, REST = 0:45

6 x 25 @ fast intensity, REST = 0:20

8 sets of 25 leg raises, REST = 0:15

Cool-down: 300 @ low aerobic intensity

Run Duration: 34 Minutes

Warm-up: Run for 10 minutes at low aerobic intensity

Workout: 14 sets of 30 seconds at VO2 max intensity with 30 seconds of recovery at low aerobic intensity

Cool-down: 10-minute run at low aerobic intensity

Thursday

Bici Basics: 1:30

Warm-up: 10 minutes at moderate aerobic intensity

Workout: 1 hour and 10 minutes at moderate aerobic intensity

Cool-down: 10 minutes at moderate aerobic intensity

Friday

Threshold Swimming + Sprint: 1.7 km

Warm-up: 300 @ low aerobic intensity

8 x 25 fast, REST = 0:10

Workout: 3 x 200 @ intensity level REST=0:45

6 x 50 @ fast intensity, REST = 0:20

8 sets of 25 leg raises, REST = 0:15

Cool-down: 300 @ low aerobic intensity

Basics: Running: 45 Minutes

Warm-up: Run for 10 minutes at moderate aerobic intensity

Workout: 25-minute run @ moderate aerobic intensity

Cool-down: 10-minute run at moderate aerobic intensity

Final workout: 6 x 20-second runs at a fast pace, with 40-second recovery periods immediately after completing today’s running workout

Saturday

Combined Workout: 1:20

Warm-up: 1 hour of cycling at moderate aerobic intensity

Workout: 20-minute run @ moderate aerobic intensity

Sunday

Basic Swimming: 2.1 km

Warm-up: 250 @ low aerobic intensity

Workout: 1,800 @ moderate aerobic intensity

Cool-down: 250 @ low aerobic intensity

Basics: Running—30 Minutes

Warm-up: Run for 10 minutes at moderate aerobic intensity

Workout: 10-minute run @ moderate aerobic intensity

Cool-down: 10-minute run at moderate aerobic intensity


Week 11

Monday

Rest

Tuesday

Bike ride with significant changes in gradient: 1:05

Warm-up: 10 minutes at moderate aerobic intensity

Workout: 5 sets of 5-minute incline variations at maximum VO2 intensity with 5′ of recovery

Cool-down: 10 minutes at moderate aerobic intensity

Wednesday

Basic Swimming: 1.7 km

Warm-up: 300 @ low aerobic intensity

8 x 25 fast, REST = 0:10

Workout: 3 x 100 @ moderate aerobic intensity, RECOVERY=0:05

6 x 75 at VO2max intensity, RECOVERY = 0:45

6 x 25 @ fast intensity REST = 0:20

8 sets of 25 leg raises, REST = 0:15

Cool-down: 300 @ low aerobic intensity

Run Duration: 36 Minutes

Warm-up: Run for 10 minutes at low aerobic intensity

Workout: 16 x 30 seconds at VO2 max intensity with 30 seconds of recovery at low aerobic intensity

Cool-down: 10-minute run at low aerobic intensity

Thursday

Bici Basics: 1:30

Warm-up: 10 minutes at moderate aerobic intensity

Workout: 1 hour and 10 minutes at moderate aerobic intensity

Cool-down: 10 minutes at moderate aerobic intensity

Friday

Threshold Swimming + Sprint: 1.8 km

Warm-up: 300 @ low aerobic intensity

8 x 25 fast, REST = 0:10

Workout: 4 x 200 at threshold intensity, REST = 0:45

4 x 50 at fast intensity, REST = 0:20

8 sets of 25 leg raises, REST = 0:15

Cool-down: 300 @ low aerobic intensity

Basics: Running: 45 Minutes

Warm-up: Run for 10 minutes at moderate aerobic intensity

Workout: 25-minute run @ moderate aerobic intensity

Cool-down: 10-minute run at moderate aerobic intensity

Final workout: 6 x 20-second runs at a fast pace, with 40-second recovery periods immediately after completing today’s running workout

Saturday

Bike Ride: 2:15

Warm-up: 10 minutes at moderate aerobic intensity

Workout: 1 hour and 55 minutes at moderate aerobic intensity

Cool-down: 10 minutes at moderate aerobic intensity

Sunday

Basic Swimming: 1.9 km

This is a timed workout. Swim at maximum intensity, as if you were in a race.

Warm-up: 250 @ low aerobic intensity

Work: 1,650 @ maximum intensity

Cool-down: 250 @ low aerobic intensity

Long Run: 1:05

Warm-up: Run for 10 minutes at moderate aerobic intensity

Workout: 45-minute run @ moderate aerobic intensity

Cool-down: 10-minute run at moderate aerobic intensity


Week 12

This is a recovery week.

Monday

Rest

Tuesday

Bike Rides: 1 Hour

Warm-up: 10 minutes at moderate aerobic intensity

Workout: 2 x 3-minute intervals at VO2 max intensity on flat or undulating terrain, with sufficient active recovery to reach a total workout time of 1 hour (including warm-up and cool-down) Cool-down: 10 minutes at moderate aerobic intensity

Wednesday

Basic Swimming: 1.3 km

Warm-up: 300 @ low aerobic intensity

8 x 25 fast, REST = 0:10

Workout: 3 x 100 @ moderate aerobic intensity, RECOVERY=0:05

4 x 75 at VO2 max intensity, RECOVERY = 0:45

Cool-down: 300 @ low aerobic intensity

Run Duration: 32 Minutes

Warm-up: Run for 10 minutes at low aerobic intensity

Workout: 12 sets of 30 seconds at VO2 max intensity with 30-second recovery periods at low aerobic intensity

Cool-down: 10-minute run at low aerobic intensity

Thursday

Bici Basics: 1:15

Warm-up: 10 minutes @ moderate aerobic intensity

Work: 55 minutes @ moderate aerobic intensity

Cool-down: 10 minutes @ moderate aerobic intensity

Friday

Threshold Swimming + Sprint: 1.4 km

Warm-up: 300 @ low aerobic intensity

8 x 25 fast, REST = 0:10

Workout: 3 x 200 @ intensity threshold, REST = 0:45

8 sets of 25 leg raises, REST = 0:15

Cool-down: 300 @ low aerobic intensity

Basics: Running: 35 Minutes

Warm-up: Run for 10 minutes at moderate aerobic intensity

Workout: 15-minute run at moderate aerobic intensity

Cool-down: 10-minute run at moderate aerobic intensity

Final workout: 6 x 20-second runs at a fast pace, with 40-second recovery periods immediately after completing today’s running workout

Saturday

Bike Recovery: 20 Minutes

Warm-up: 10 minutes at recovery intensity

Cool-down: 10 minutes at recovery intensity

Sunday

Sprint Triathlon!

If you can’t find a triathlon to enter today, try doing a triathlon on your own

Warm-up: 800-meter swim

Commute: 19 km by bike

Cool-down: 5 km run

 


 

Work out in an OXYBURN outfit

TRAX Tank Top – Made with ultralight fabric that maintains the perfect body microclimate. The self-ventilating micro-mesh structure accelerates sweat evaporation, keeping the body dry. The complete absence of seams and raw-edge finishes provide a feeling of absolute comfort.

AXO Shorts – Medium compression with lightweight yet durable fabric. It’s like being wrapped in a protective shell that supports, protects, compresses, and helps your muscles work efficiently.

SPEED Beanie – The lightweight technical fabric provides pleasant warmth and comfort in cold weather, while preventing overheating thanks toits excellent breathability.

ESCAPE Socks – Medium compression; shortens muscle recovery time and accelerates the elimination of lactic acid. The seamless integration of an anatomical elastic structure ensures a perfect fit and total protection. The layer in contact with the skin is made of Dryarn® polypropylene .

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