These are shoes that are worn on the bike. They have a stiff sole so that with each pedal stroke there is no power lost on any part of the pedal stroke. A good shoe usually will not bend, is light and has a cleat on the bottom to attach to the pedal. Bike shoes allow a rider to pull during the whole pedal stroke. For triathlons a shoe with velcro is best.
Velcro can make putting on the shoes much easier and faster.
Brick Workout A type of workout that triathletes do to simulate race conditions. Most triathlons are in the order Swim, bike, run. When triathletes switch from bike to run, their legs feel weird. A brick workout lets the racer practice the unusual feeling, so it feels more comfortable during a race. Body marking Because there is a swim involved, paper numbers cannot be used to mark the athletes.