In this Corner ... Lindsay Lohan

6/12/2010 4:10 AM PDT BY TMZ STAFF
You gotta hand it to her ... Lindsay Lohan is trying hard to find ways to fill her days.

0612_Lohan_boxing_getty
Lindsay showed up at at "Muscle Milk Light" women's fitness retreat yesterday in Bev Hills. 

Kind of ironic ... since she's suing over that whole "milkoholic" ad thing.