well, a cycle not only consist of a supplement that will increase your strength and endurance combined with a high cal diet.
but with an excersise program that proves 1+1=2
for instance pushing that extra 15lbs on your bench press, can usually only be obtained for 9-21 weeks in some cases before you become so fatigued that you have to stop your cycle to recoperate.
for instance just completed a brutal 14 week cycle. i gained about 180lbs. on my leg press, and i bench pressed 225lbs. in sets of 5.
it could be Tribulis, Methoxy-7, whatever.
it all basically works.