This usually involves a support crew who supply food and water at the major transitions areas, where change of discipline usually occurs. Adventure racers must plan their food and sleep requirements as these events are non-stop. A team is only as fast as the slowest member. Physical aptitude is only part of it of race requirements - each team member needs to be mentally tough as well. If the fastest team member can't handle the added stress of sleep deprivation, or being lost in the woods, then that member will become the slowest.
Teamwork is the key to winning.
Each individual must compromise some for the greater good of the team. Each team member must support the others.