Running crazes emerged several times in US history only to fade. One of the was in the 1880s too with cross-US races. The modern running boom started around 19

Running crazes emerged several times in US history only to fade. One of the was in the 1880s too with cross-US races. The modern running boom started around 1968 with Dr Ken Cooper's book called Aerobics. He coined that term. Aerobic exercises were the best exercises in his studies. And running and swimming were the most intense aerobic exercises.