im still a firm believer that cardio is much better for conditioning purposes but it all has to do with what that purpose really is. When i was hardcore freestlye wrestling, if i didnt keep up the rigorous windsprints and prolonged running, i would notice that my endurance went down no matter how long i was spending in the gym. And now that i focus on lifting, my endurance is shit when i step on the mat. Just my 2 pennies