proper exercise for 8 months GSD ?! - Page 1

I am trying to find out what is a proper exercise for my 8 mths GSD ? swimming ? chasing and fitching a ball ? i know that itsn't running till he is at least 1 year.
and how often should it be? for ex. 30 min. daily or an hour every 2 or 3 days?
I know that there is much variables like the dog him self, weather, feeding, etc,etc but I just need some guide lines so I can build up on it according to my dog.

ofcourse there is daily walks regardles all of the above.

Thanks in advance

in dog training school i was tought, that a dog needs to be brought to a heavy pant everyday (bout 20 min roughly should do so), for breeds such as gsd, the same rule, but twice a day.............keep in mind that that only handles the physical aspect, u still need to make sure that you mentally challenge them as well..................u may be able to get some GSD speciffic info that may be better, but since noone had said anything, i figured id share the generic info that i had

thanks alot supakamario, really appreciated :)

15 minute's of ball chasing, running and romping 3 times a day
Just remember NO jumping off of anything onto hard surface. You don't want to injure joint's (elbows- hips). Just have fun and try to teach some FUN obedience along the way. Best of luck to the both of you. Take Care