10 Innovations That Changed the Way We Exercise
In the late 19th century, physiologist Charles-Edouard Brown-Sequard discovered he felt "rejuvenated" after injecting himself with testicular extracts from dogs and guinea pigs. Decades later, in 1935, scientists isolated and chemically synthesized testosterone (two of them, Adolf Butenandt and Leopold Ruzicka, won a Nobel for their work). Anabolic steroids, synthetic derivatives of testosterone, were used as performance enhancers among Olympic weightlifters in the 1950s. Although now illegal in professional athletics due to their long-term negative health affects and performance-altering effects, steroids grab the spotlight every sports season with the stars that take them spurring no shortage of controversy along the way.