I think this is one of the most interesting topics for discussion.I have gotten the best results by performing my training in 3- and 4-week blocks.Every three or four weeks I like to alter the rep range slightly and/or switch up my training split to emphasize any developing weaknesses.And the last week of any "block" of training is what I call a low volume week.This is where I will reduce my total workload by about 25-50% to allow for recovery.I have found that reducing the volume every third or fourth week(as opposed to reducing the intensity level)has been very beneficial in avoiding overtraining.After two or three of these training "blocks", I will focus on a new goal-neural strength,hypertrophy,etc.