Track and field was very likely among the first sports to be affected by PEDs. Anabolics in the sprints and weight events, and blood doping in distance events. The Soviet bloc was using steroids as early as the 1950s, mainly with their weightlifters. It branched out into track and field from there. Weights are a necessary part of every world class sprinter's training regimen, and athletes who throw the shot, discus or hammer probably spend more time in the gym than they do on the field. Pole vaulting requires an enormous amount of upper body strength. Cycling was long in the dark ages of sports doping, using mostly amphetamines and other stimulants.