These are the practice times at DD's gym:
Level3 - 2 days of 3 hours plus optional 3 hours on Saturday (so 6-9 hours)
Level4 - 2 days of 3 hours plus 1 day of 4hrs (10hours total)
Level 5 - 3 days of 3 hours plus 1 day of 4hrs (13 hrs)
Level 6 - 4 days of 3 hours plus 1 day of 4hrs (16 hrs)
Level 7-8 - 3 days of 4 hours plus 2 days of 3 hours (18 hrs)
DD is 10 and competed level 4 last year during 4th grade. She is hoping to compete Level 5 this season - she missed a month of vault & floor due to injury this spring (couldn't run or jump...) and needs to make her vault and tumbling passes "prettier" to pass her skill test. So she is currently practicing 13-16 hours a week (level 5 schedule plus make-up practices) to catch up. It is all her idea. She even has a conditioning plan for when we are on vacation. This is a very self-motivated sport. What I see in our DD and her teammates is a love for gymnastics and dedication to themselves and their team. They have a great time at practice, but it is definitely work!
From speaking with parents at other gyms at meets, our girls' practice schedules seem to be somewhere in the middle - some practice more hours, some less. Many of the parents commented on how fit/toned/muscular the girls in our gym are, which led to discussions of conditioning - seems like our gym does more than average. The girls just accept it as part of practice; it is funny - their conditioning was recently increased, and I didn't even hear a single complaint about it in carpool this time!