Cycling and running – two disciplines, one sport. The duathlon is the perfect alternative for anyone who wants to experience the thrill of multisport but wants to avoid swimming or doesn't have the opportunity to do so.

The typical format: run – cycle – run. You start with a run, switch to the bike, and finish with a second run. This structure presents its own tactical challenges: How do you pace yourself when there's still a run to go at the end?

Why duathlon?

The reasons for choosing duathlon are varied. Some people don't enjoy swimming, others don't have a pool or lake nearby. For runners looking to get into multisport training, duathlon is a logical step. For triathletes, duathlon can be a welcome change of pace during the off-season. The combination of running and cycling provides a well-rounded workout, the risk of injury is lower than with running alone, and the races are exciting and challenging.

The distances

Standard Duathlon (Sprint): 5 km run – 20 km bike – 2.5 km run. Standard Duathlon (Short): 10 km run – 40 km bike – 5 km run. Long Distance: 10 km – 60 km – 10 km (and longer). Powerman Format: 10 km – 60 km – 10 km (classic Powerman distance).

This guide shows you how to get started in duathlon and successfully master your first competition.

Duathlon is not simply 'triathlon without swimming' – it is a sport in its own right with its own challenges.

The structure: run-wheel-run

Unlike a triathlon, you start with a run. This means your legs are under strain from the very first meter. The first run shouldn't be too fast – you need to conserve energy for the bike and the final run. The bike course is the middle section – here you partially recover from the first run, but you also need to prepare for the second. The second run begins with legs still feeling the effects of the bike ride – similar to the run in a triathlon, but after a more intense start.

Pacing is everything

The biggest challenge in duathlon: managing your energy. Beginner mistake number 1: Running the first run too fast. You feel fresh, run at your normal pace – and pay the price later. Beginner mistake number 2: Cycling too fast. After the first run, the bike feels 'relaxed'. Your legs are running on fumes for the final stretch. The second run is the ultimate test, both mentally and physically – whoever still has reserves wins.

The transitions

Two transition zones instead of one in a triathlon: T1 (run → bike): Take off your running shoes, put on your helmet, put on your cycling shoes if necessary, and grab your bike. T2 (bike → run): Put down your bike, take off your helmet, and put on your running shoes. The transitions are quick – no wetsuit hassles like in a triathlon.

Who is duathlon for?

Runners who want to get into multisport. Triathletes who can't or don't want to swim. Athletes without access to swimming facilities. Anyone who loves the combination of running and cycling. Triathletes in the off-season (fitness check without swimming).

In a duathlon you run twice – running training is therefore very important.

The special feature

You need to be able to run twice: once fresh (first run) and once after intense training (second run). Both runs require different skills. The first run needs to be controlled – discipline over speed. The second run requires mental strength and the ability to cope with fatigue.

Training structure

Frequency: 3-4 times per week. Types: Easy runs (40-60 min, Zone 2). Tempo runs (20-30 min at a brisk pace). Intervals (e.g., 6 x 1000m or 10 x 400m). Long run (1 x per week, 60-90 min).

Example units

Easy run (50 min): Zone 2, conversational. Base endurance. Tempo (45 min): 10 min warm-up. 25 min at a comfortably hard pace (slightly slower than 10k pace). 10 min cool-down. Intervals (50 min): 15 min warm-up. 6 x 1000m fast (90 sec to 2 min recovery). 10 min cool-down. Long run (75 min): Steady, moderate intensity.

Simulate the second run

Train to run with tired legs: Run after a hard workout the day before. Brick sessions: Cycle and run back-to-back. Double runs: Run in the morning and evening (rare, but effective).

Pace strategy

First run: 10-15 seconds per kilometer slower than your current 10k pace. Second run: Another 10-20 seconds slower – fatigue will do the rest. Example: 10k time: 50 min (5:00/km). First run: 5:10-5:15/km. Second run: 5:20-5:30/km (in a good race).

Cycling is the longest part of the duathlon – here you save time and conserve (or use up) your legs for the final run.

The challenge

You get on your bike with already tired legs. You have to ride 20-60 km efficiently. You need to get off the bike with reserves for the final run. This requires: strong cycling endurance, smart pacing, and the ability to recover your legs while on the bike.

Training structure

Frequency: 2-3 times per week. Types: Endurance rides (60-90 min, easy). Tempo rides (45-60 min with threshold sections). Intervals (short, hard efforts). Long ride (1x per week/every 2 weeks, 90-120 min).

Example units

Endurance (75 min): Easy pace, Zone 2. Focus on a constant cadence (85-95 rpm). Tempo (60 min): 15 min warm-up. 2 x 15 min at race pace (Zone 3-4), 5 min easy in between. 10 min cool-down. Intervals (50 min): 10 min warm-up. 6 x 3 min hard (Zone 4-5), 3 min easy. 10 min cool-down.

Pacing on the bike

Your duathlon bike pace should be controlled – similar to a triathlon. Don't push yourself so hard that your second run suffers. Rule of thumb: 80-85% of the power you would use in a pure bike race. Power metering is ideal: 75-80% FTP. Heart rate: Zone 3, no higher. The last 3-5 km: Pedal a little easier, prepare your legs for the run.

Cadence

A high cadence (90-100 rpm) conserves leg muscles for the second leg. Too low a gear means too much force per pedal stroke, leading to increased muscle fatigue. Especially in the last few kilometers: shift to an easier gear and pedal faster.

In duathlon there are two transitions – brick training is therefore important.

Why combined training?

The body needs to learn to cycle efficiently after running – and, more importantly, to run efficiently after cycling. The second transition (bike → run) is the more critical one: the legs feel heavy and uncoordinated.

Coupling variants

Run-bike brick: 15-30 min run, then immediately 45-60 min bike. Trains the first transition and cycling with pre-fatigued legs. Bike-run brick: 45-60 min bike, then immediately 15-30 min run. Trains the critical second transition. Full simulation: 20-30 min run – 40-60 min bike – 15-20 min run. Complete race simulation in a shorter format. Bricks: 3-4x (15 min bike + 10 min run) without a break. Intense transition training.

frequency

One to two brick workouts per week are ideal. At least one bike-run workout per week. Occasionally (every two to three weeks) a full simulation.

The bike-to-run transition

The first 500-1000m after cycling feel strange. Your legs are heavy, and your gait is uneven. This improves after 2-5 minutes. Strategies: Don't start too fast! Short, quick strides (high cadence). Pay attention to your posture (don't fall forward). After a few brick workouts, the transition will improve.

Tips for paddock training

Practice the transitions: changing shoes, putting on/taking off your helmet. Test your equipment: cycling shoes, running shoes, everything you'll use in competition. Nutrition: test what you eat and drink while cycling.

Compared to a triathlon, the equipment for a duathlon is simpler – no wetsuit, no swimming gear. Here's what you need.

Run

Running shoes: Your most important piece of equipment. Well-broken-in shoes that you're familiar with. Lighter shoes might be suitable for the race. Some athletes use different shoes for runs 1 and 2 – this requires space in the transition area. Running clothes: These can be the same as for cycling (triathlon suit) or separate shorts/shirt.

Ride a bike

The bike: A road bike or fitness bike is ideal. A triathlon bike with aero bars offers advantages over longer distances. Important: It must be in good working order and fit properly. Helmet: Mandatory! Cycling shoes: Clipless pedals and cycling shoes are more efficient, but regular sneakers will also work. Sunglasses: Protection and better vision.

Duathlon-specific

Triathlon suit (tri-suit): A one-piece or two-piece suit that you can wear continuously. Saves transition time. Not strictly necessary – running shorts and a cycling jersey will also work. Race number belt: An elastic band for your race number. Quick to put on in T2 (often the number needs to be at the front for the run). Shoelace alternative: Lock laces or elastic shoelaces for faster transitions.

In the transition area

Towel (for standing, orientation). Helmet (open, within easy reach). Cycling shoes (if clipless pedals). Running shoes (for run 2, possibly different from run 1). Race number + belt. Optional: Sunglasses, gel, drink.

Budget tip

To start: Good running shoes (you probably already have them). A functioning bicycle and helmet. Running/cycling gear you already own. A tri suit, clipless pedals, and a race belt are upgrades for later.

This plan will take you from 'I can run and ride a bike' to 'I'm ready for my first duathlon'.

Requirements

You can run 5 km. You can cycle for 30-45 minutes. You already train 3-4 times a week.

Weekly effort

Weeks 1-6: 5-7 hours. Weeks 7-10: 7-9 hours. Weeks 11-12: Taper, 4-6 hours.

Phase 1: Foundation (Weeks 1-4)

Focus: Foundation in both disciplines. Per week: 3x running (30-45 mins). 2x cycling (45-60 mins). 1x brick workout (30 mins cycling + 15 mins running). 1x rest. Intensity: Mostly easy, occasionally moderate sections.

Phase 2: Development (Weeks 5-9)

Focus: Increase volume, introduce intensity. Per week: 3x running (incl. 1x tempo or intervals). 2-3x cycling (incl. 1x tempo). 1x brick workout (longer: bike 45-60 min. + run 20-30 min.). Key sessions: Long run (60-75 min.). Long bike ride (75-90 min.). Full brick workout simulation (every 2-3 weeks).

Phase 3: Specific (Week 10)

Focus: Race simulation. Key session: Full distance as training (or close to it). Practice transitions. Pace close to race pace.

Phase 4: Taper (Weeks 11-12)

Focus: Getting fresh. Volume: 50-60% of peak week volume. Intensity: Short, intense sessions. Last week: Only easy sessions.

Example week (Phase 2)

Mon: 40 min run (easy). Tue: 60 min bike (incl. tempo sections). Wed: 45 min run (intervals: 6x1 km). Thu: Rest or very easy cycling. Fri: 30 min run (easy). Sat: Brick workout: 20 min run – 50 min bike – 15 min run. Sun: 75 min bike (endurance).

Tactics are key in duathlon – here's your race plan.

Before the start

Set up your transition area: Bike to the designated spot. Helmet open on the handlebars or next to it. Running shoes for run 2 ready (if different from run 1). Keep everything neatly arranged on a small towel. Memorize the location (landmarks).

Race 1

Start: Controlled! The most common mistake: Starting too fast. Pace: 10-15 sec/km slower than your normal 10k race pace. Feeling: 'I could go faster' = correct. 'This feels like race pace' = too fast! Last 500m: Accelerate slightly, prepare your legs for the cycling rhythm.

T1 (Run → Bike)

Run into the transition area. Put on your helmet (mandatory!). Put on your cycling shoes (if your shoes and pedals aren't clipless). Grab your bike and run/push it to the mounting line. Mount only after passing the line. Goal: Under 1:30 min.

Cycling route

The first 3-5 km: Find your pace, don't overpace. Pacing: Controlled, 75-80% of your maximum cycling power. Your legs are partially recovering from the first run – take advantage of this. Cadence: High (90-100 rpm), especially towards the end. Last 3-5 km: Pedal a little easier, prepare your legs for run 2. Nutrition: For distances over 30 km, drink/eat something.

T2 (Wheel → Run)

Dismount before the finish line. Park your bike, remove your helmet. Put on your running shoes (fasten your laces!). Turn your race number to face forward (if necessary). Run out. Goal: Under 1 minute.

Run 2

Km 1-2: Hold back! Your legs will feel strange – that's normal. Then: Find your own pace. It will get better after 1-2 km. Last 500m: Give it everything you've got!

In shorter duathlons (sprint), nutrition is less critical than in triathlons – but still important.

Before the competition

The day before: Normal, carbohydrate-rich diet. Stay well hydrated. In the morning: Eat breakfast 2-3 hours before the start. Tried-and-tested, easily digestible options: toast, banana, porridge. 50-100g of carbohydrates is usually sufficient. Shortly before the start: Optionally, a small gel or sports drink.

During the competition (sprint distance)

In a sprint duathlon (5-20-2.5 km, duration 60-90 min.), you usually don't need any nutrition during the race. Water on the bike is optional. No solid food is necessary. Focus on good preparation rather than nutrition during the competition.

During the competition (short/long distance)

Nutrition becomes more important in longer duathlons (2+ hours). On the bike: Replenish fluids on bike legs of 40+ km. Use a sports drink or water + gel. Consume 30-60g of carbohydrates per hour for long distances. Run 2: For very long distances (10 km final run), consider using gels at aid stations.

Hydration

Sprint distance: Being well hydrated beforehand is usually sufficient. Longer distances: Water bottle on the bike, drink on the course. Don't overdo it – extreme drinking is unnecessary for races under 90 minutes.

After the competition

Consume carbohydrates and protein within 30-60 minutes. Rehydrate well. Celebrate!

You've completed your first duathlon – what's next?

Option 1: More duathlon

The duathlon scene is thriving – there are events for all distances. Sprint duathlons: Several are possible per season. Short/standard distance: The next challenge. Powerman events: The long-distance version of duathlon. You can do duathlon for years and always find new goals.

Option 2: Triathlon

Many duathletes eventually switch to triathlon. You already have the cycling and running training. Swimming can be learned – even as an adult. Your duathlon fitness is an excellent foundation. The next step: take swimming lessons or develop your technique on your own. Gradually build up your swimming volume. Make sprint triathlon your first goal.

Option 3: Specialize

Focus on one discipline: Running: Cycling fitness for injury prevention will make you a better runner. Cycling: Time trials, road races, Gran Fondos. Combining both disciplines as cross-training is ideal.

Option 4: Run-Bike-Run variants

There are creative formats: Aquathlon: swimming + running (no cycling). Cross-duathlon: mountain biking + trail running. Winter duathlon: cross-country skiing + mountain biking (rare). The multisport world has many niches.

Duathlon as training

Even triathletes use duathlon: off-season competitions (when swimming is on hold). A way to check your fitness for cycling and running. Variety and motivation. No matter which path you choose: you've mastered a multisport. The ability to combine two disciplines stays with you – wherever your journey takes you.