The duathlon is similar to a triathlon but only combines two sports -- running and cycling. Competitions start with the athletes running a specific distance before transitioning onto the bikes for the cycling leg; they finish with another running leg. To ensure the safety of the athletes, spectators and race staff, duathlons must be conducted according to rules related to the cycling and running legs, as well as general course rules.
Transition Area
The transition area in the duathlon is similar to that of a triathlon, with a specific mount and dismount line. This line marks the area within the transition zone where you can't ride the bike. For example, you must run with the bike past the dismount line and then mount the bike on the course. After finishing the cycling leg, you must dismount the bike before the line and then run the bike into your specific transition area.
Support Crew
Duathlons restrict outside assistance or support crews during the race. Friends and family are encouraged to show moral support and cheer, but you may only receive support from race staff regarding details about the course. For example, if you experience a flat tire or bike problem, you must fix the tire by yourself before proceeding on the course. This rule for support crews ensures that the duathlon is an individual -- not team -- sport.
Equipment
Every athlete must wear his race number visibly on the front of his body during the entire race along with the supplied timing device. While on the bike, he must wear an ANSI-approved bike helmet and have it fastened before mounting the bike. Riders will be disqualified if they don't obey the rules regarding equipment and helmets. The also must obey all traffic laws and orders from police or park officials.
Wave Start
Duathlons with a large number of competitors use a wave start to control congestion at the starting line and within the transition area. The wave start allows the fastest athletes to start first and gradually progresses to the recreational athletes. Some races require that you preregister with a running or cycling time to qualify for a specific wave and make it mandatory to start within your assigned wave.
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