Triathlon Distances: Choosing Your First Race
Before building your training plan, pick your target distance:
| Format | Swim | Bike | Run | Typical Finish (Beginner) |
|---|---|---|---|---|
| Super Sprint | 400m | 10 km | 2.5 km | 45–75 min |
| Sprint | 750m | 20 km | 5 km | 1:15–1:45 |
| Olympic | 1,500m | 40 km | 10 km | 2:30–3:30 |
| 70.3 (Half Ironman) | 1,900m | 90 km | 21.1 km | 5:00–7:00 |
| Ironman | 3,800m | 180 km | 42.2 km | 10:00–17:00 |
Recommendation for first-timers: Sprint triathlon. It's long enough to be a genuine challenge but short enough to complete on relatively modest training volume (8–10 hours per week at peak). This plan covers Sprint first, with an Olympic distance adaptation in Phase 3.
Prerequisites
Before starting Week 1, you should: - Swim: Complete 400m continuously (not fast — just non-stop) - Bike: Ride 30–45 minutes comfortably - Run: Run 20–30 minutes without stopping
If you can't yet meet these minimums, spend 4–6 weeks building each discipline before starting the structured plan.
12-Week Sprint Triathlon Training Plan
Phase 1: Base Building (Weeks 1–4)
| Week | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|---|
| 1 | Rest | Swim 20 min | Bike 30 min | Run 20 min | Rest | Bike 45 min | Run 25 min |
| 2 | Rest | Swim 25 min | Bike 35 min | Run 25 min | Rest | Bike 50 min | Run 30 min |
| 3 | Rest | Swim 30 min | Bike 40 min | Run 25 min | Rest | Bike 60 min | Run 35 min |
| 4 | Rest | Swim 20 min | Bike 30 min | Run 20 min | Rest | Bike 40 min | Run 25 min |
Phase 1 focus: Volume and discipline consistency. All sessions at easy effort (Zone 2). No speed work. The goal is making swim-bike-run a regular habit and building aerobic base in all three disciplines.
Phase 2: Development (Weeks 5–8)
| Week | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|---|
| 5 | Rest | Swim 35 min | Bike 45 min | Run 30 min | Rest | Brick* 60+20 min | Run 35 min |
| 6 | Rest | Swim 35 min | Bike 50 min | Run 30 min | Rest | Brick 70+20 min | Run 40 min |
| 7 | Rest | Swim 40 min | Bike 50 min | Run 30 min | Rest | Brick 75+25 min | Run 40 min |
| 8 | Rest | Swim 25 min | Bike 35 min | Run 25 min | Rest | Brick 50+15 min | Run 30 min |
Brick sessions: Bike immediately followed by run (transition included). The specific fatigue of running on "bike legs" — heavy, stiff quads — must be trained. Without brick sessions, the run leg of a triathlon feels far harder than standalone run training suggests.
*Brick notation: Bike duration + Run duration*
Phase 3: Peak and Taper (Weeks 9–12)
| Week | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|---|
| 9 | Rest | Swim 40 min | Bike 55 min | Run 35 min | Rest | Brick 80+25 min | Run 40 min |
| 10 | Rest | Swim 40 min | Bike 55 min | Run 35 min | Rest | Brick 85+30 min | Run 45 min |
| 11 | Rest | Swim 30 min | Bike 40 min | Run 25 min | Rest | Brick 60+20 min | Run 30 min |
| 12 | Rest | Swim 20 min | Bike 25 min | Run 15 min | Rest | Rest | Race Day |
Swim Training for Triathletes
Triathlon swimming differs from lap swimming: - No flip turns (open water) - Mass start or wave start — drafting and contact possible - Sighting required every 6–10 strokes to navigate buoys
Key swim sessions for beginners:
| Session | Protocol | Purpose |
|---|---|---|
| Endurance | 10–12 × 75m with 15-sec rest | Build distance capacity |
| Pace work | 6 × 100m at target race pace, 20-sec rest | Race-day pacing |
| Sighting drills | 200m with eyes-open sighting every 6 strokes | Open water navigation |
| Open water sim | Continuous 600–800m without wall touch | Race simulation |
Sprint triathlon swim target: Complete 750m in 18–25 minutes (2:24–3:20 per 100m). Focus on smooth, consistent stroke over maximum speed — the swim is the shortest leg and burning matches in the water costs you on the bike.
Bike Training for Triathletes
Triathlon bike training focuses on sustained aerobic power — you ride for 20–40 minutes (sprint) or 60–90 minutes (Olympic) at a level that still allows you to run afterward. This requires practicing race-pace effort on the bike.
Target bike cadence: 85–95 RPM. Higher cadence (easier gear, pedaling faster) is more metabolically efficient and leaves the legs less fatigued for the run than "mashing" big gears at low RPM.
Race intensity: Zone 3–4 heart rate (75–88% MHR) for sprint distance; Zone 2–3 (65–78% MHR) for Olympic distance.
Run Training for Triathletes
The run always hurts more than standalone running. "Brick legs" — the heavy, cement-like sensation of running after cycling — is universal and only improves through regular brick training.
Key adaptation: Run off the bike at your target race pace in training, not at your comfortable standalone run pace. Most beginners are surprised to discover their triathlon run pace is 30–60 sec/km slower than their standalone 5K pace.
Race Day Strategy
Transition Setup (T1 and T2)
Fast transitions are free time — the only part of triathlon where you don't need fitness.
Pacing Strategy
Nutrition and Hydration
Frequently Asked Questions
Do I need a triathlon bike? No — a road bike is perfectly adequate for sprint and Olympic distance. A triathlon-specific bike (TT/tri bike with aero bars) provides approximately 3–5% speed advantage on the bike leg. This matters for competitive age-groupers, not first-timers.
Do I need to be good at swimming? You need to be able to complete the swim distance safely, not quickly. In a sprint triathlon, a 20-minute swim vs. a 14-minute swim is 6 minutes — completely insignificant compared to minutes you can save with better pacing and training on the bike and run. Swim enough to be safe and efficient; don't over-invest training time in the shortest leg.
How do I handle the open water fear? Practice in open water before race day. The combination of cold water, waves, mass start contact, and no lane lines disorients most pool swimmers on their first open water attempt. Two to three open water swims before your first race dramatically reduces anxiety. Wear a wetsuit (if permitted) — buoyancy reduces fatigue and increases confidence.
