12 Week Intermediate Half Distance Plan: Built for Progress

Many intermediate plans are boring because they rely on repetitive volume that fails to challenge your fitness. This 12 week program is designed for the balanced athlete whose swimming ability matches their cycling and running performance. We included a wide variety of sessions to keep you engaged while targeting improvements across all three disciplines equally. This blueprint replaces junk miles with science based training that has a clear purpose, ensuring you arrive at the start line sharp and ready to race.

How You Will Succeed

• Balanced Improvement: Follow a structured build that develops your swim, bike, and run speed at a consistent rate to ensure a well-rounded race day performance.


• Personalized Pacing: Every session uses your personal targets so you know exactly how hard to work. You will stop guessing and start training with precision.


• Energy Control: Learn to manage your effort on the bike so you have the strength and fuel to finish the half marathon with a powerful run.

The Science of Your Progress

• Sustained Speed: Targeted intervals help you hold a faster pace for longer periods without your technical form breaking down.


• Saving Energy: Improve how your body uses fuel during the bike leg so you do not hit the wall during the half marathon finish.


• Better Technique: Simple focus points help you move through the water faster and run with improved mechanics. All swim sessions are written by a professional coach.


• Aerobic Capacity: High intensity blocks increase your top speed, making your target race pace feel significantly easier and more manageable.

Your 12 Week Roadmap

• Weeks 1 to 4: Foundation. Establish benchmarks and build the stamina needed for higher intensity work.


• Weeks 5 to 8: Specificity. Shift to sessions that mimic the exact effort and speed you will need on race morning.


• Weeks 9 to 12: Peak and Taper. Reduce training volume while keeping the quality high so your systems are primed for maximum performance.

This Plan Is For You If:

• Balanced Athlete: Your swimming, cycling, and running abilities are at a similar level and you want a plan that develops them all.


• PB Chaser: You have some triathlon experience and are ready for a schedule designed to break through previous records.


• Dedicated Performer: You value structure, variety, and science based progression over just doing more miles.

Requirements and Inclusions

You should be able to swim 100m in roughly 1:50 to 2:30, cycle for 1 hour, and run for 45 minutes.

• 12 weeks of detailed training designed for maximum impact.


• 6 to 9 sessions per week: 2 swims, 3 bikes, 3 runs, and 1 strength session.


• 1 strategic rest day to allow your body to recover and adapt to the training.

Check out our other Half Distance Training Plans Here

Take the Next Step

Don't leave your next race to chance or waste time with a generic plan. Follow a system built for your specific profile. Trust the process and reach your true potential.