How long before Weight Lifting

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So my surgeon said to lay off anything strenuous for at least a month. I understand that so we are all on the same page. I will be taking weight training at my college in January though (about 1month after surgery). My question is do I have to wait longer because I am going to be working those specific muscles whereas a contact sport just makes use of different muscle groups. Like if I intend to work specifically my chest do I have to wait longer than 1 month?