Spoiler alert, here's the results for those who can't be bothered clicking the link,
I've never looked into steroids very much. I'm a complete neutral on the topic in general. So i'm not sure if there's been studies like this done before or not but it's the first i've came across it.Group 1 (no exercise, natural) experienced no significant changes. No surprise there.
Group 2 (no exercise, drug use) was able to build about 7 pounds of muscle. That’s not a typo. The group receiving testosterone injections and NOT working out at all gained 7 pounds of muscle.
Group 3 (exercise, natural) was able to build about 4 pounds of muscle.
Group 4 (exercise, drug use) was able to build about 13 pounds of muscle.
What's especially interesting is the guys on roids and doing no training gained more muscle than the natural guys who trained. Proving, at least to an extent, that guys using steroids can make progress doing stupid programs (or, no program, as the case may be).
p.s I never scrutinised the study itself just read the review.