Why do steroid-taking athletes pay attention to their physical exercise regimens?

To Boost Brain Health and Per­for­mance, Har­ness Neu­ro­plas­tic­i­ty The Right Way (Cre­ativ­i­ty Post):

“…How­ev­er, despite large invest­ments, evi­dence that “smart” drugs or brain sup­ple­ments actu­al­ly work is scarce at the present. The recent exten­sive NIH meta-analy­sis found no evi­dence that any of the med­ica­tions tracked (name­ly statins, anti­hy­per­ten­sive med­ica­tions, cholinesterase inhibitors, or estro­gen) were suc­cess­ful at improv­ing or main­tain­ing cog­ni­tive func­tion­ing over time. Some drugs have pro­duced pos­i­tive effects for peo­ple who have neu­ro­log­i­cal dis­or­ders such as Alzheimer’s dis­ease, Parkin­son’s dis­ease, or Atten­tion Deficit Dis­or­der — when patients take these drugs, their symp­toms are usu­al­ly less­ened. How­ev­er, no sol­id sci­en­tif­ic evi­dence has shown so far that these drugs are reli­ably ben­e­fi­cial or safe for peo­ple with nor­mal func­tion­ing. Even in the sup­posed sce­nario that a smart drug or sup­ple­ment that can “dou­ble brain­pow­er” with no side effects is dis­cov­ered, it would be mis­guid­ed to believe that the drug alone would be enough. If things worked that way, why do steroid-tak­ing ath­letes still have to pay atten­tion to their phys­i­cal exer­cise regimens?”

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