i have been lifting for about 2 years with advice from this forum. i am stronger and more lean than when i started. i also thought that i was fairly conditioned until i tried some conditioning workouts that boxers use (sledge hammer swings, burpees, snatches, jump rope, tabatta intervals...). these guys are super conditioned. by following some of these conditioning routines, would i hinder my chances for any significant size gains? i have posted on here in the past with problems of gaining size and the advice i got was to cut down on the cardio....thanks for any thoughts or opinions.