LST is 'low stress training'...I'm arguably NOT using LST even though I said I was as most people understand LST to begin in the early stages, when one ties down the main stem (so that it's practically horizontal / parallel to the ground) in order to encourage side branches to grow and flower ...a good description of this method can be found at Marijuana Growing - DUBMAN'S guide to low stress training (LST)

What I'm really doing is training the main stem to bend quite late in the day (like a 45 degree angle) so side branches have some time to catch up and, hopefully, flower more than they otherwise would. The plant gets 'bushier' that way. Let me add that I'm still a 'newbie' as this is only my third grow! I'm sure more experienced hands would have more to say on the subject.

best,
jash