It all depends on the athlete constitution, body type, diet, and life style. Asuming that the athelte eats properly, train hard, and weight around 200 lbs, 500mg will affect his GONAD cycle.
SKiping scientific jargon and putting it on laymans terms, the libido is being mantained by the substantces. It is very likely that athelte own factory is producing very little, if not none.
As to maintnence, is very important to define muscle.. Muscle is compose of muslce fibers (fast, slow,etc). Those are the one the athelte wants to grow & reproduce. This is happens with proper stimulus thru high intense workout, nutritional intake provide all the necesary nutrients, rest time and quality favor the repair/rebuilt/generta of muscle. In this respect, and condition, anabolic will exert their full impact.. that is.. for QUALITY MUSCLE.
With this in mind, a decent portion of your maintnence could liquid.
Five months in respect for quality muscle is allot. Athletes are better off switching to milder substances, and then go to primobolan. Trying to keep as much as possible of your real muscle. Dont hold on to dearly to the liquid one. .is just not the real thing.
One more thing.. is hard to make the CHANGE.. but experience has proven that the key for the proper usage of certain substances is moderation. Is much better to be able to do one or two cycles a year and gain quality muscle, make continuos progress and know that 90% you will keep . Eventuallly the athlete will have to drop the juice, either for medical, aging, financial, or legal issues.
Hope this helps