I remember gym class containing not nearly enough movement. Every week was learning some new game and it took half the time each day to explain rules.
I worked in an elementary school a few year ago though and it's gotten worse. About 20 minutes lunch and 20 minutes recess, which was often canceled due to weather. The kids only had gym one week out of every three.
Additionally, obese, impeded or just untalented kids get mercilessly attacked by the other kids. The only ones to shine are the guys who go on soccer or basketball practice, and they're usually the guys going after "weaker" kids in the first place (which is easy when you got some muscle).
Usually it is one teacher responsible for the entire group of kids, which means that the teacher is busy the whole time explaining stuff to kids which means that inappropriate behavior gets unnoticed way too often.
Organized school sports/gym classes like the ones I had are beyond evil and next to useless, speaking out of more than enough experience.
I worked in an elementary school a few year ago though and it's gotten worse. About 20 minutes lunch and 20 minutes recess, which was often canceled due to weather. The kids only had gym one week out of every three.