Multi-Sport
Multisport Training Guide: Duathlon, Aquabike, and Hybrid Formats
How to train for multisport races beyond triathlon — duathlon (run-bike-run), aquabike (swim-bike), and off-road multisport, with transition and pacing strategies.
The multisport landscape beyond triathlon
Multisport racing encompasses any event that combines two or more disciplines in a single race. Beyond the standard triathlon (swim-bike-run), the common formats are duathlon (run-bike-run), aquabike (swim-bike), aquathlon (swim-run), and off-road multisport (often called XTERRA-style: swim-mountain bike-trail run). Each format offers a way to race multiple disciplines without the full complexity of a triathlon, and each appeals to athletes who are strong in certain disciplines but want to avoid others.
Duathlon is ideal for athletes who cannot or prefer not to swim — it is a run-bike-run format, typically with a 5K run, 30K bike, and 5K run for a standard distance, or a 10K run, 40K bike, and 5K run for a longer format. Aquabike is swim-bike, ideal for athletes who enjoy swimming and cycling but do not want to run. Aquathlon is swim-run, a growing format that is simpler than triathlon (no bike) and often held in scenic locations. Off-road multisport (XTERRA) combines open-water swimming, mountain biking, and trail running. Browse multisport races to find events across all formats.
Duathlon: the run-bike-run challenge
Duathlon is the most popular non-triathlon multisport format, and it has a unique challenge: the run-bike-run sequence means you start with a hard run, then must transition to the bike, then run again on tired legs. The first run is often fast — there is no swim to spread the field, so the race starts as a road race — and the challenge is to run hard enough to be competitive without burying yourself before the bike. The second run is the real test, as you must run on legs that have just cycled at threshold.
Training for duathlon resembles triathlon training without the swim: two runs, two bikes, and one brick (run-bike or bike-run) session per week. The brick is essential — practice running hard, then biking, then running again, to simulate the race's demands. The second run in a duathlon is often the deciding factor, so train the bike-to-run transition specifically. Use the race calendar to find a duathlon and map your training to it.
Aquabike and aquathlon
Aquabike (swim-bike) is a growing format that appeals to swimmers and cyclists who want to avoid the run. The training is similar to triathlon without the run: two swims, two bikes, and one brick (swim-bike) session per week. The race is typically the swim and bike legs of a triathlon, with the finish at the bike-to-run transition area. Aquabike is a good option for athletes with running injuries or for triathletes who want to race without the impact of the run.
Aquathlon (swim-run) is a simpler format that is growing in popularity, especially in scenic locations. The format is a swim followed by a run, with distances ranging from a 1K swim and 5K run to longer combinations. The training is two swims, two runs, and one brick (swim-run) session. The transition from swimming to running is less jarring than the bike-to-run transition in triathlon, as the legs are not pre-fatigued from cycling. Aquathlon is a good entry point for swimmers who want to try multisport. Save your target multisport race to My Season so the countdown keeps your training balanced.
Off-road multisport (XTERRA)
Off-road multisport, popularized by the XTERRA series, combines open-water swimming, mountain biking, and trail running. The format is more demanding than road triathlon because all three disciplines are on technical terrain. The swim is in open water (often a lake or ocean), the mountain bike is on singletrack with climbs and descents, and the trail run is on dirt with elevation. The training adds technical skills to the standard triathlon base: mountain bike handling, trail running technique, and open-water swimming.
If you are coming from road triathlon, the transition to off-road requires new skills. Practice mountain biking on singletrack — the technical handling is different from road cycling. Practice trail running — the footing and elevation are different from road running. The swim is similar, but the open-water conditions may be rougher. Browse multisport races and look for off-road or XTERRA-style events. The mountain bike training guide and the trail running training guide cover the technical skills for the off-road disciplines.
Choosing your multisport format
The multisport format you choose depends on your strengths and preferences. If you are a strong runner and cyclist who does not swim, duathlon is the natural choice. If you are a swimmer and cyclist who does not run, aquabike fits. If you want a simpler two-discipline format, aquathlon is ideal. If you want the challenge of technical terrain, off-road multisport offers the most adventure. Use the race directory to filter by state and date, and check the format and distances before registering.
For your first multisport race, choose a short format — a sprint duathlon (2K run, 15K bike, 2K run) or a short aquathlon (500m swim, 3K run). The transitions are simpler than a full triathlon, and the distances are manageable. Gear is minimal: running shoes, a bike and helmet (for duathlon and aquabike), and a swimsuit and goggles (for aquabike and aquathlon). After your first multisport race, the natural progression is to longer distances or to the full triathlon format, covered in the triathlon training guide.