Originally Posted by Brisco
While he does argue the effect is small, I cannot find anywhere where Dr. Adair has ever said, implied or argued that PEDs had "no impact" on home run power in baseball. He is reported as having said the added bulk from PEDs would cause 2-3 more home runs per year. To quote "There is no question the drug use helps..."
More importantly, Adair's study of physics was limited to effect of added bulk resulting from steroids. He did not study the effect of steroids on speeding up the healing process nor their ability to extend careers. See Rick's excellent post above concerning the effects of this change.
Adair and others have written extensively that steroids had very minimal effects on home runs. Steroids have not been shown to improve the healing process either, on the contrary steroids are damaging to health and are much more likely to cause injuries than to heal them.