Conditioning Tips and Questions

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Hello, I'm 15 years old and am incharge officiating for an Upward Basketball leauge at our church. For those of you who may be unfamiliar with Upward you can visit http://www.upward.org

The rules are based on the rules of the NFHS or the local high school association (LHAA for me). Can just anyone call the association and get a rule book and officials handbook?

Is there an age limit to begin officiting. I'd like to begin recieving Junior High assignments when I turn 16.

Lastly, I noticed the other night during one of the evaluation nights that im sort out of condition for basketball officiating. I'm a lineman during football season so all of my conditioning is geard towards that. Would sort of conditioning would yall suggest for basketball officiating?

THanks for all yalls help and advice.

BTW- I work the clock for the Junior High games and have a pretty good feel for games at that level. I often chat with the officials during halftime and in between boys and girls games.