How long after strenuous aerobic exercise can liver chemistry remain elevated ?

Not liver chemistry: Technically, after a very strenuous workout, your muscle enzymes may be elevated and these include the "liver" enzymes ALT and AST, which are also found in muscle tissue; one way to check if this is a muscle issue is to also do CPK enzyme; however, assuming you have not totally trashed yourself, your enzymes should normalize within a week or so;