We do conditioning at the gym for around an hour to 40 minutes.. But we also do conditioning during events. Yes I do conditioning at home. My coach gave us a Geddart's Twistars conditioning sheet which is very helpful in conditioning at home. And lastly, no we do not HAVE to do conditioning during breaks and at home, but I mean gymnastics basically revolves around strength and flexibility, so lets be real here, if you aren't doing any conditioning, it is going to be a struggle for you to do gymnastics well. Just my opinion.