In reply to FL1PD4N:
I'm not into sport climbing and don't know much about training, so take this with a pinch of salt.
I think the time it takes to go from 6b+ to low 7s varies enormously between people. Often seems to me that teenagers seem to be able to get to E6, 7c etc in about 3 weeks (I exaggerate...) whereas those goals don't feel possible to me. Age and natural physiological factors play a big part.
Some general hints though. The best training for climbing is climbing. If your primary goal is getting better at climbing, then all the time you're doing weights or yoga or whatever, you'd be better off climbing. There's very little danger of causing yourself injury from imbalances - it might be an idea to do a few press-ups (or general antagonist exercises) but you don't need to spend sessions doing that instead of climbing. If you do 3 or 4 full-on climbing sessions a week, you should achieve that goal pretty quickly (weeks/months?).
I reckon bouldering is very helpful - it's how you gain strength and learn how to do hard moves. All time spent bouldering is helpful in climbing of any style, you can never have too much strength or technique. Worth bearing in mind that strength is hard won but lasts, and stamina comes and goes easily. So time invested in gaining strength is time well spent.
Also, if you can onsight 6b+, you can probably redpoint 7a anyway. The difference between someone's onsight grade and redpoint is normally a few notches.
Hope that's a useful start.
