From what I can tell I would be on the side of caution and start light and slowly.  Too heavy too soon and you can be injured and not be back to the gym for a while.  Start light till you are at a habit of workingout.  I would say try to slowly get into weight for around 30 days till you add much ore weight.  Of course you can up the weight a little if it is too easy but slow and steady.  Getting into shape should not be a race.

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