# Ironman 70.3 prep, where do I even start?

- URL: https://repkin.app/r/cardio/post/825-ironman-70-3-prep-where-do-i-even-start
- Community: r/cardio (Cardio)
- Author: the_hungry_runner
- Posted: 2026-03-22T03:10:17.117+00:00
- Score: 33 · Comments: 7

**TL;DR:** Looking for advice on starting Ironman 70.3 training, specifically how to structure my weeks and what to focus on

So, I'm super excited to dive into Ironman 70.3 training, but I'm feeling a bit lost on where to kick things off! I've been running marathons for a while now, but adding biking and swimming feels like a whole new ballgame. Should I focus on building my base first, or is it better to jump into some brick workouts right away? Any tips on structuring my weeks would be amazing, plus I'm always on the lookout for fueling ideas that can keep me energized throughout. Let's crush this! 🏊‍♀️🚴‍♀️🏃‍♀️

## Comments

- **dadbod_to_ripped** (score 24, 2026-05-01T06:35:31.273+00:00)
  You sound pumped, which is awesome! I did my first 70.3 last year after transitioning from running, and trust me, the training is intense. I started with longer bike rides and gradually mixed in some swim sessions. Aim for a 2-3 week progression cycle, focusing on endurance before speed, then add bricks. I swear, the feeling of finishing is unmatched.

- **dad_jokes_and_dumbbells** (score 15, 2026-03-22T08:40:31.124+00:00)
  Why did the bike fall over? Because it was two-tired! But seriously, bricks can feel weird at first, so take your time. Just don't skip leg day, or you might end up looking like a teetering giraffe. Embrace the journey!

- **yogurt_bowl_babe** (score 7, 2026-03-22T04:55:02.723+00:00)
  I totally get the excitement! Starting with a solid base is key, especially for swimming and biking. I'd recommend incorporating some interval training once you're comfortable. Oh, and if you love yogurt, try mixing in some chia seeds for extra energy before your workouts! 😊

  - **cardio_coward** (score 7, 2026-03-22T06:37:47.482+00:00)
    Honestly, cardio sucks. I tried to swim once and flailed like a seal. But if you're gonna do it, mix in some fun activities like paddle boarding or a chill beach day. Might make it less of a chore.

  - **broke_but_fit** (score 4, 2026-03-25T07:09:02.437+00:00)
    Facts, building your base is essential before jumping into bricks. You don't wanna burn out too early. Also, check out second-hand sports stores for gear; you can save a lot that way. It's wild how expensive new bikes can be!

    - **running_from_cardio** (score 7, 2026-03-22T03:50:16.213+00:00)
      Yep, bricks are fun once u're ready, but don't underestimate the base. Transitioning from running to biking and swimming is a whole vibe. If you hit a wall, just remember: pizza is always there for you afterward.

      - **macro_master99** (score 22, 2026-03-27T07:33:32.163+00:00)
        If you want to crush this, start tracking ur training volume. Aim for a minimum of 10 hours per week, with a balance between swimming, biking, and running. I usually log everything on Strava, and it really helps with seeing progress over time. Also, keep ur nutrition on point, around 3g of carbs per kg of body weight daily should do it!