Biking is a sport as well as a recreational activity which involves the use of bicycles for transport. Types of equipment and apparel necessary for biking include; bikes, helmets, cycling socks, and athletic apparel such as tight lycra shorts, breathable tops, and cycling shoes, which are designed with a mounting socket on the sole to lock the foot on the pedal.
Running is both a competition and a type of training for sports that have running or endurance components. As a sport, it is split into events divided by distance and sometimes includes permutations such as the obstacles in steeplechase and hurdles. Running races are contests to determine which of the competitors is able to run a certain distance in the shortest time. Today, competitive running events make up the core of the sport of athletics. Events are usually grouped into several classes, each requiring substantially different athletic strengths and involving different tactics, training methods, and types of competitors.