the published study was quite small and the results were temporary, once you stopped riding the benefits disappeared. and the results seemed to require very vigorous exercising, i have a recumbent bike and 70-80 rpm for even 5 minutes is quite a pace.

i'm reserving judgement until the results of the current trial are published. i've read studies where less strenuous exercise requiring little or no equipment has been beneficial.

can't disagree that exercise is beneficial, just not jumping in whole hog that this is proven beyond a shadow of a doubt.