12 Week Beginner Half Distance Plan: Built for Speed

Most beginner plans are boring. They rely on slow miles that lead to stagnation. This 12 week program is different. Built for the athlete who already has speed in the water but is stepping up to the 70.3 distance, we focus on sessions with a clear objective. You will follow a science based schedule designed to make you stronger. Every workout has a purpose, ensuring you arrive at the start line ready to race rather than just trying to survive.

How You Will Succeed

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


• Personalized Pacing: Stop guessing how fast you should go. Every session uses your personal pace targets to ensure effective training for your current fitness.


• 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. This is the key to a strong finish.


• 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 even when 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.


• Front Pack Swimmer: You have a strong swimming background and want a plan written by a pro swim coach to maintain your edge.


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

Requirements and Inclusions

You should be able to swim 100m faster than 1:50, cycle for 60 mins, and run for 40 mins.

• 12 weeks of structured training syncing to TrainingPeaks.


• 5 to 8 sessions per week: 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.