12 Week Beginner Half Distance Plan: Built for Real Progress

Most beginner plans are boring. They rely on the same slow miles that lead to stagnation. This 12 week program is different. Built for the athlete stepping up to the 70.3 distance for the first time, we focus on sessions with a purpose. You will follow a science based schedule that makes you stronger and faster, ensuring you reach the finish line ready to race rather than just hoping to survive the day.

How You Will Succeed

• Finish with Confidence: Follow a safe, steady build for the 1.9km swim, 90km bike, and 21.1km run.


• Personalized Pacing: Stop guessing. Every session uses your personal pace targets to ensure you are working at the right intensity.


• Energy Control: Learn to manage your effort on the bike so you have strong legs for the half marathon finish.

The Science of Your Progress

• Aerobic Efficiency: Improve fuel burning to avoid hitting the wall when the race gets tough.


• Race Speed Practice: Train at the exact speeds you need to hold on race day so they feel natural.


• Better Technique: Simple focus points help you swim faster and run with less effort. All swim sessions are written by a professional swim coach.


• Mental Readiness: Includes rehearsal sessions so you know exactly what your body can do before the start line.

Your 12 Week Roadmap

• Weeks 1 to 4: The Base. Build a consistent routine and foundational fitness for the work ahead.


• Weeks 5 to 8: The Build. Introduce sessions that teach your body to maintain speed while tired.


• Weeks 9 to 12: Peak and Taper. Reduce volume while keeping quality high so you feel powerful on race morning.

This Plan Is For You If:

• First Time Half Distance: You want a professional schedule for your first 70.3.


• Developing Swimmer: You expect to finish the swim in the back third and want a plan written by a pro swim coach.


• Goal Oriented Beginner: You prefer structure over a random schedule.

Requirements and Inclusions

To get the best results, you should be able to swim 100m in 2:30 to 3:30, cycle for 60 minutes, and run for 40 minutes.

• 12 weeks of structured training syncing to TrainingPeaks.


• 5 to 8 sessions per week including 2 swims, 3 bikes, 2 runs, and 1 strength session.


• 2 strategic rest days to allow your body to rebuild and get stronger.

Check out our other Half Distance Training Plans Here

Take the Next Step

Don't leave your first race to chance or waste time with a boring plan. Follow a system grounded in science and built for your needs. Trust the process and cross that finish line with a smile.