AAS (at least testosterones) will build some muscle WITHOUT EXERCISE. It's just the lifting speeds up the process much.
My transsexual friend who used to look anorexic and had no muscle at all, had packed visible, manly-looking biceps and traps and other muscles since starting injecting Testosterone Cypionate and this person never, ever works out except doing yoga stretches, never lifts, no pushups, nothing. He says muscle grow like on a boy during puberty--they'll grow without exercise in the presence of hormone. Say boys might not exercise but they grow bigger and more muscular during puberty. All my friend got to do it eat more. Transgendered people who use testosterone but don't workout always pack on upper body muscle, but how much depends on genetics (similar to male relatives). I'm talking about 400mg testosterone per month for 6 months or so for genetic female... it might be different for genetic guy whose body might not respond by growing extra muscle if they're at normal T levels to start with.
Non-exercising male with a desk job has much more muscle mass in upper body than non-exercising (and often exercising) female. This is cause testosterone alone will build these muscles, but yes it won't be athlete's muscles of course...Yes it makes all sense to lift harder, just scary to cause a blow-out of tendinitis, since tendons don't strengthen as fast as muscles grow and my tendons seem to be problematic.. so I'd lift slightly harder. Wonder if testosterone could help with shoulder impingement that's hindering my lifting--I noticed shoulders respond much better without usual pain when using T.