i think most research has shown andro doesnt work. however, the last 10 years or so have seen a large increase in supplement use (the legal and effective stuff like creatine), nutrition, and weightlifting. these things may have been available for years but they didnt really become popular until the 90's. many of the ball players of the 70's and 80's said they hardly ever spent time in a weight room. there are some smaller parks, potentially watered down pitching due to expansion and possibly juiced balls. maybe not everyone can agree on who took roids, but i think we can all agree a sizable amount of players took roids. beyond that though, i think people are hitting more home runs because they are trying to hit more home runs. chicks dig the long ball, bigger contracts for 30+ homers, etc. people are hitting the weights and watching tape because they want to hit more homers.
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