Ironman 70.3 Training Plan: 20-Week Guide

Photo by Jorge Romero on Unsplash

The Challenge: 1.2-mile swim, 56-mile bike, 13.1-mile run

Four Training Phases

Phase 1: Base Building (Weeks 1–8)

• 6–8 hours/week of easy, conversational-pace training
• Build aerobic foundation across all three sports
• Focus on consistency over intensity

Phase 2: Build (Weeks 9–14)

• 8–11 hours/week adding intervals and speed work
• Recovery week every 3–4 weeks
• Increase long workout duration

Phase 3: Peak Training (Weeks 15–18)

• 10–12 hours/week at race pace
• Practice nutrition and race-day logistics
• Simulate race conditions with brick workouts

Phase 4: Taper (Weeks 19–20)

• 5–6 hours/week to rest and recover
• Maintain light intensity, reduce volume by 50%
• Let body absorb 18 weeks of training

Weekly Structure

• 3 swims: technique, endurance, speed
• 3 bikes: recovery, intervals, long ride
• 3 runs: recovery, tempo, long run
• 1–2 brick workouts: bike-to-run transitions

Key Principles

• Recovery: 7–9 hours sleep, easy days truly easy
• Nutrition: 30–60g carbs/hour for workouts over 90 minutes
• Strength: 1–2 sessions/week focusing on legs, core, stability
• Consistency beats perfection: Missing workouts happens — just get back on track

Trust the process. Your finish line is waiting.

Ready to Train With Confidence?

If you want a structured plan that’s built around beating cutoffs and finishing strong, check out this Ironman 70.3 Training Plan. It’s designed for busy athletes who want to:

**Follow a progressive 24-week system**

• Train with cutoff-focused pacing strategies
• Use brick workouts to handle fatigue on race day
• Arrive fresh with a smart taper