Unicycles are one-wheeled vehicles that evolved from the original bicycle, the Penny Farthing, which consisted of a large front wheel and a much smaller back wheel. Unicycling builds strength as riders must balance using only their abdominal muscles and leg muscles. This helps you build a healthier core. It increases your levels of coordination, concentration and balance. You'll never run out of challenges on a unicycle. Once you master riding forward, you can focus on riding backward, one foot... And once you excel at riding, you can learn how to play unicycle hockey, ride in the mountains, master trial obstacles, go on tours, or learn freestyle tricks to name a few disciplines.