The basis of high intensity training
Arthur Jones created HIT back in the 1970's as an alternative to the high volume routines that often gave his gym followers little results. He scientifically tested his methods in order to convince skeptics in the training industry. Mike Mentzer and others that he trained took what they learned from Jones and created their own twists to the system. The most influential spokespersons for modern day HIT training would likely be people like the sadly departed Mike Mentzer, 6-time Mr. Olympia Dorian Yates, and others who you'll no-doubt find if you do a simple Internet search.
Here's a list of the most important exercises:
Legs and lower back - deadlifts, squats, leg presses
Back and biceps - rows, chins, shrugs
Chest, shoulders and triceps - Bench press or dips, overhead press
Abs - sit-ups or crunches
With these exercises you keep in mind poundage targets that are hard but achievable, and when you accomplish them, raise the stakes and set new ones. "Ah", you say, "but I'm a bodybuilder! Unconcerned with strength, I only want big arms and bulging pecs, big enough to make the girls drool over my better than perfect body!"
Nope. The reason why poundage targets are used is that poundage targets are not only the simplest indicators of progress, but also the best. There may not be a completely linear relationship between size and strength, but one does exist and if today you can curl 100 lbs for 6 repetitions, yet in 6 months you manage 140 lbs in the same fashion, your arms will undoubtedly be bigger. Focus on getting stronger in the "big basics" and your body will develop much better than it would by measuring yourself each week.
Here are some good targets to work to over the medium to long term, once you reach these you will have surpassed 99% of all weight trainers all over the world, and will likely be one of the stronger guys in your gym.
Squats to 1? above parallel: 315 lbs x 15, 400 lbs x 1
Deadlifts: 385 lbs x 10, 500 lbs x 1
Bench press: 275 lbs x 8, 335 lbs x 1
Standing shoulder press: 180 lbs x 6
Bent over rows: 255 lbs x 10
Lifting these poundages at 210 lbs bodyweight, would roughly equate to an arm of over 16 inches and a chest of over 45 inches, depending on your height obviously. Do these sound small? Arnold Schwarzenegger's arms were 19 inches, he may have claimed otherwise but at his peak they were measured by Arthur Jones in fair and controlled conditions. Nowadays bodybuilders still claim measurements that are far in excess of what they truly are, and if I were you I would take those (and their poundage claims) with a pinch of salt. The only bodybuilder I would believe when it comes to his lifts would be Ronnie Coleman. He has powerlifter strength in a bodybuilder's body, just check out his videos.