I would also like to add that the month off is great for the mental aspect of boredom with training (not climbing). I am 95% positive most of us that
actually train, hate the process. It gets boring. I don't want to get back on that wall and run through another battery of bouldering problems I have already done once. I don't want to put another 15 minutes on the treadwall. I can't do another set of lock-offs. Weighted pull-ups just suck. Another run and I will puke from lack of interest.
I start to feel the desire to give up on my training sessions at about six to seven weeks in. If I drop off of a problem and don't get back on during that time it is not because I can't do it or I am physically drained. I am just plain tired of training. I will usually last two more weeks of serious training and then I am about done. I will find other things to do.
A brief break of a 4 to 7 day period usually allows my mind to keep pushing it, and if I change my workouts to super intense so that I need those breaks to allow my body to rebuild (remember that your body rebuilds itself best when you are sleeping) from the necessary physical trauma then it is actually beneficial for my body too.
I believe that most people that just climb and progress naturally into the 12 range within a year or two of climbing could have hit the thirteen range by adding training to their regimen. I know that sounds crazy, but I know I am a slightly natural climber just because I have a natural athletic ability. I am not exceptionally gifted at climbing. My progress so far has been due to my training and not natural talent.
Read Siegrist's blog on how many breaks he has taken
http://www.jstarinorbit.com/2010/12/me-vs-rest.html. He doesn't take breaks and climbs and trains all the time. He has made 14d in nearly the same amount of time it took me to get to 12a. (However, during that same time I got a BA and a MFA, got married, had a child, and got a fulltime job. Maybe if I just climbed and trained I would be sending all the tough projects the Red has. Details. Details). He was far more naturally gifted at climbing then most people. He rose above all the naturally gifted people because of his training. If we (you) are not as gifted at climbing then you (we) need to train to get better. However, that gifted climber that also trains will be even better. (Sorry to get into the philosophy of training, but my minor was in physical education. I only took one education class for that program though. All my classes were in physical training, designing weight and training programs, and athletic training).
Everybody has a set limit of physical ability, however you will never achieve it without proper training. Period. No ifs, ands, or buts. Period.
Everybody also has to train for sport specificity (although some things can crossover), has to train for what their body will allow (and mind), and take the appropriate amount of rest their body needs to reach that limit of ability. Everything is different for everybody. We are not all the same no matter what the modern PC world wants to push on us. Give me someone that climbs mid thirteens and has never done one single training program and I could make them better. No doubts. If you can't notice the holes in your game, and do not know what your body needs (or inversely can
actually put out), getting someone in your climbing group that can actually see those things might be crucial for you to achieve your desire to get better.
Notice in J-Star's blog that he finally sees the holes in his game. He finally learns what his body demands. That demand is rest. His rest is different than what my rest (mentally and physically) is, and yours. However, he is in that top percent. I would say that most (all) of us are not where he is and to copy his gameplan, or any gameplan that is similar, would be detrimental and possibly dangerous for the normal climber. Even read Odubs blog on training and about Bronaugh telling him he just doesn't try. Odub finally learned what he was capable of. If you are training and you are experiencing no progression and physical trauma I would suggest that you actually analyze your own potentials, then your own body's needs and demands. Then finally after you have an
accurate view of yourself, redesign your whole training and climbing plan to fit into that reality.
To get better you need to train. To get better you need rest. However, it will all look different for every different climber. If you train the exact same way as your buddy or your hero you will not live up to your own potential. Period.
There is a complete difference from climbing and training. Climbing is fun. Training is boring (to me).
That month off each year recharges both my physical and mental batteries.
You might not need a month, but all of us need to rest.