I'm a bar athlete I guess, I started lifting at 16 I'm 32 now. For awhile I didn't have access to weights so ended doing calisthenics. I was inspired a guy named king on YouTube. Believe it or not I got jacked just from Cali's, people thought I was on roids when all I was using was creatine.
My routine was push ups 1000 push up by 50 reps.
I would do this in pyramids in different variations.
Sit-ups about 100 too many would cramp my abs.
Pulls up 12 - 15 to 20 in variations such as 12 knuckles in 3 sets ( close grip, standard grip, wide grip).
Dips 100 , triceps dips 100, sqauts
And I can't forget muscle ups.
When I finally got back into the gym my body blew up of course over time but I noticed striations which I never had before flexibility and muscle stamina.
So conditionion IMO is exactly what it is and should be tool added to any BB's arsenal. But did start to lack in my bar performance after focusing primarily on the weights. I think it was because of the added muscle weight.