I know just how age can strike when you're least expecting it. Only yesterday I can remember being 40, now I'm 61 !! Crazy. Seems to happen to everyone though. Started training seriously 4 years ago after looking in the mirror and being seriously unimpressed. Lost loads of fat and gained more lean, then from 2007 onwards competed in four bodybuilding shows. You might be interested in reading my 2007 journal - the before and after photos are in message
http://www.muscletalk.co.uk/fb.ashx?m=2382422 My weekly routine is also a 4-day split, currently courtesy of Micky McKay (see
www.fitness121.co.uk), but I have to say that without James Collier's nutrition & diet advice over the past 3 years my training would have been wasted - ask him to help (
www.healthyaction.co.uk)!
Each session starts with a 5 min warmup and lasts about one hour - sometimes 70-75 mins. Each bodypart has 12-16 sets. Ths splits are back + triceps + abs, quads + calves + abs, chest + biceps +abs, delts + hams + calves. I don't always do abs as mine are a relatively strong area. Just as an example, lat pulldowns are: warm-up 30kg x 20, 40kg x 15, worksets are 55kg x 12, 60kg x 10, then 2 sets of 65kg x 8. Half the exercises are machine based, half are free weights (mainly dumbbells).
My bodyweight is currently 94kg, competition target weight 80kg (though I appreciate that may not interest you in the slightest!). Estimated fat % is 16-17 offseason.
Oh, and cardio sessions offseason are a brisk walk for 45 mins 3 times weekly.