I was a Junior C middle weight when I was in highschool. I've done boxing, football, soccer, baseball and amateur body building and box, by far, is the toughest training I have ever gone through. Although obviously the sparring and bag work is important, the cardio and
resistance training is as well. I had a trainer monitoring my nutrition as well as motivating me which is definately advantageous but good training can be accomplished without one.
My routine went: (Note NSBT refers to non sparring bout training. It means skipping, specific ab routines, and footwork)
Monday 12 km bike ride/NSBT
Tuesday Resistance training/windsprints/sparring
Wednesday: 5 km jog/NSBT
Thursday (AKA Hellday by my trainer): Resistance training starting at 2PM, windsprints, sparring as well as NSBT all until the point of failure (usually around 8 or 9 PM)
Friday 8 km bike ride
The biggest skills you need to develop are:
Stamina - It is ridiculously tough to keep your arms swinging, midsection and core flexed, and be able to keep footing for round after round after round
Core strength - Your abs are your best line of defense. You'll never see more abdominal/oblique work than that of a boxing
training routine
Breathing - I had a real hard time with this. During the first 8-12 monthes your core won't be strong enough to protect you so you need to "flex" during a bout. Breathing while flexing your midsection is tough, but not nearly as painful as when your opponent connects with a weak and relaxed stomach.
My advice would be to pick your weight class, and no its not just weigh yourself and look at the charts. Find a target weight class and work towards it. I aimed for a middle weight is pretty heavy for the age I was when I started. Thats because I wanted my advantage to be overall strength, most of my components spent half the time I did performing resistance training.
How much do you weigh, how tall are you, and whats your current build?
After you've picked a weight class you need to decide if you want to just reap the benefits of some of the toughest training in the world (which by all means is a smart decision) or if you want to proceed. If you do you need to get "associated" with a local club. Be forewarned though this is a big step. Being associated is a very legal thing (I am in Canada but the laws are very similar). This means if you get in a fight and are charged with assault, it's assault with a deadly weapon because you are associated.
Brendan