8-Week Sprint Intermediate Triathlon Training Plan

Plan Overview

This 8-week sprint triathlon plan is designed for intermediate athletes who have completed at least one sprint event and are ready to race faster. You should be comfortable swimming 750m continuously, cycling for 60 minutes, and running a 5K without stopping before starting week one. By the end of the plan you will have sharpened your race-pace fitness across all three disciplines and improved your transitions.

Prerequisites

• Can swim 750m continuously at a comfortable pace
• Can cycle for 60 minutes at moderate effort
• Can run 5K without walking
• Has completed at least one sprint or super-sprint triathlon event
• Access to a pool, road bike or turbo trainer, and a running route

Plan Structure

The plan is divided into three phases: a 3-week base-building phase to refresh your fitness and establish consistency, a 3-week build phase introducing race-pace intervals across all three disciplines, and a final 2-week peak and taper phase designed to sharpen your speed and reduce fatigue ahead of race day.

• Weeks 1-3: Base Phase — Building aerobic fitness and muscular endurance across all three disciplines; sessions at Zone 2 with short technique work; weekly hours 4 to 6
• Weeks 4-6: Build Phase — Introducing race-pace intervals in swim, bike and run; brick sessions added from week 5; weekly hours 6 to 8
• Week 7: Peak Phase — Highest volume of the plan with one race-simulation session; total race-distance swim, bike and run within a single week; weekly hours 7 to 8
• Week 8: Taper — Volume reduces by 40%; intensity maintained; race-day prep sessions only; rest 2 days before race

Sample Week (Build Phase — Week 5)

This sample week from the build phase gives you a clear picture of the workload and variety in the plan.

• Monday: Rest or 20-minute easy recovery swim (technique only)
• Tuesday: Pool interval swim — 45 minutes including 6 x 100m at race pace with 20 seconds rest
• Wednesday: Turbo trainer FTP builder — 60 minutes with 3 x 10-minute threshold intervals
• Thursday: 30-minute threshold run — race pace effort with warm-up and cool-down
• Friday: Rest or light stretching
• Saturday: Brick session — 40-minute bike at race effort followed immediately by 15-minute run at target pace
• Sunday: Long easy run — 45 to 50 minutes at Zone 2 for aerobic base maintenance

Key Tips for Success

• Consistency beats heroics — hitting 90% of sessions every week will outperform one perfect week followed by missing sessions due to injury or fatigue
• Use this plan alongside a heart rate monitor or power meter on the bike to ensure your easy days are genuinely easy
• Practise your transitions in training — even 10 minutes of T1 and T2 drills in the final 3 weeks will save you time on race day
• Race week: follow the 7-day taper guide, prioritise sleep, and trust the fitness you have built over the previous 7 weeks