12-Week Olympic Intermediate Training Plan

Plan Overview

This 12-week plan is designed for intermediate triathletes who have completed at least one triathlon and are ready to race the Olympic distance more competitively. You should be comfortable swimming 1500m, riding 40km, and running 10km before starting. By the end of 12 weeks you will have developed race-specific fitness across all three disciplines, with a particular focus on threshold tolerance and pacing discipline. Expect 8-12 hours of training per week during peak weeks.

Prerequisites

• Can swim 1500m continuously without stopping
• Can ride 40-50km comfortably on the bike
• Can run 5-8km without significant difficulty
• Has at least one completed triathlon race (any distance)
• Access to a pool, open water venue, road bike or turbo trainer, and running route

Plan Structure

This plan is divided into four phases, each building on the previous. Volume increases progressively with a recovery week every fourth week to allow adaptation before the next training block.

• Weeks 1-3: Base Phase — Focus on aerobic fitness and technique across all three disciplines. Establish your training routine and identify your current FTP and CSS paces through time trials.
• Weeks 4-6: Build Phase — Introduce race-pace intervals, sweet spot bike work, and threshold swim sets. Volume increases by 10-15% from the base phase. Week 4 is a recovery week.
• Weeks 7-9: Peak Phase — Highest volume and intensity block. Race-pace efforts in all disciplines, brick sessions, and open water practice. This is the most demanding phase of the plan. Week 10 is a recovery week.
• Weeks 10-12: Taper — Volume reduces by 30-40% while maintaining intensity. Race simulation sessions in the final two weeks. Rest and sharpen for race day.

Sample Week (Build Phase)

Here is a typical week from the build phase (weeks 4-6) to give you a sense of the workload and session variety:

• Monday: Rest or easy 20-min recovery swim
• Tuesday: Threshold swim — CSS pace work (45 min, pool)
• Wednesday: Cadence work high RPM turbo session (60 min)
• Thursday: Tempo run 60 minutes steady effort
• Friday: Rest or light stretching and mobility work
• Saturday: Long endurance ride — 90 minutes aerobic base with sweet spot finish
• Sunday: Bike-run brick session — 60 min ride + 20 min transition run

Key Tips for Success

• Consistency is everything — an imperfect 12 weeks of regular training beats a perfect 8 weeks followed by burnout or injury
• Listen to your body and use the traffic light system when managing any niggles or fatigue — never push through red-light pain signals
• Nail your nutrition, particularly pre- and post-workout fuelling — recovery nutrition significantly impacts your ability to train hard the following day
• Include at least two open water swims in the final 4 weeks to practise sighting, buoy turns, and wetsuit swimming in race conditions