Is This Plan For You?

This 12-week Olympic Distance Intermediate Base plan by GA Endurance is designed for triathletes who want to build a strong and sustainable aerobic foundation before entering a race-specific training phase.

It is ideal for athletes who already have a consistent training background and want to further develop endurance, efficiency, and durability across swim, bike, and run disciplines.

If you are looking to improve your aerobic capacity and prepare your body for higher intensity and race-specific work, this plan provides a clear and structured pathway.

What You Can Expect

• A complete 12-week structured Base phase for Olympic Distance Intermediate athletes

• Moderate and progressively increasing training load

• Strong emphasis on aerobic development, efficiency, and consistency

• Balanced progression across swim, bike, and run disciplines

• Progressive long sessions adapted to Olympic distance demands

• Controlled introduction of sub-threshold and tempo efforts

• Bike sessions focused on aerobic strength and pedaling efficiency

• Run sessions designed to improve aerobic capacity and durability

• Swim sessions including technique refinement and aerobic conditioning

• Light and consistent brick sessions to maintain neuromuscular coordination

• Strategically placed recovery weeks to support adaptation and reduce injury risk

• Clear, easy-to-follow workouts using pace, heart rate, or perceived effort

• Optional strength guidance to support durability and injury prevention

Coaching & Support

This plan includes Coach Access.

If you have any questions during your training, you can reach out anytime via:

coachsupport@gaendurance.com

Requirements

To start this plan, you should be able to:

• Swim at least 1,000–2,500 meters continuously

• Ride consistently for 90–180 minutes

• Run continuously for 45–75 minutes

• Train consistently 4–6 days per week

• Have prior experience with structured endurance training

A GPS watch and heart rate monitor are recommended, and a bike power meter can further enhance training accuracy.

Final Note

This 12-week intermediate base plan is designed to establish a strong and durable physiological foundation before progressing into more demanding race-specific training.

With a focus on consistency, aerobic development, and controlled progression, this phase prepares your body for higher intensity and performance demands. If followed with discipline, you will transition into your next phase stronger, more efficient, and ready to perform at a higher level.

Explore more training plans at GA Endurance