i myself am always on the look out for new ways to train etc. i find the recovery from gear will allow most people to train for a little longer and train a muscle more frequently,
therefore training on an upper/lower split works well if most if you are not too advanced, or as i prefer a 3way split every other day, this allows me to train each muscle group every 5-6 days which seems to be optimal for 90% of people, if your goal is strength and mass, i still believe that training larger groups of muscle mass in one session is best for overall mass gains and keeping the body anabolic, so grouping 2-3 muscle groups together at one time and using compound exercises will spike the natural hormones needed for growth and stress the most amount of muscle mass, 5-6 day muscle splits work well for those who have been training for a number of years and need to blast each muscle intensly to trigger a response....i still only train a muscle 1-2 times a week tops but that works well for me, reducing the frequency can help with additional mass gains in some, as recovery is the most important aspect of your training, gear or no gear....
everyone is different, both in experience and genetically, your diet etc. will all dictate your training methods and frequency.....there is no one size fits all, just guide lines which most of us should abide by......
i never train more than 2 days on the trot but i feel even now i have worked up the ability to go all out for both of those sessions and require the extra days rest,
we sotra need to know your training experience really, but there are a few things you can be sure of, you will be anabolic pretty much all the time, rest is still neccisary, nutrition needs to be on-form, training for a little longer than usual and training a muscle more frequently is acceptable, its more a trial and error thing, you are learning all the time...
oh warm-ups are essential, 5-10mins on an exercise bike/tead mill or rower will get your heart rate up, then 5 mins of stretching along with your first couple of warm up sets should suffice......i start the clock when i begin my first working sets and so should you, so in theory you will be in and out of the gym within an hour and a half say 4days a week.....
be sure to check out bodybuilding and weight training for specific goals ie. sports/power lifting etc.
Helpfull training advice for bodybuilders
Training frequency