
Originally Posted by
ascendant
there are some people who do the stuff year round, non-stop for years. this however is not something i'd personally advise, primarily due to the fact that being on for long cycles greatly increases your risk of side-effects.
the intention of cycling on and off is to allow your body to get back to normal during the off-times. shutting yourself down by being on a cycle that long gives you a much higher probability of getting sides.
additionally, being on longer doesn't necessarily mean better gains as you said. our bodies tend to gain in spurts (hence the term "growth spurts"), so you will go through phases of gaining and maintaining. additionally, gaining faster also means more of a chance of injuries, as our joints and other connective tissues build up slower than our muscles do.
personally, i think 4 months is about the max you should be on before taking some time off.