Ditto, I throw Xtend in my during workout shake and sip on throughout my entire time at the gym. Some people start sipping on it before they get to the gym but that is up to you.

I personally do cardio immediately after my weight training and drink whatever is left in my shake during my cardio session. The Xtend will help preserve muscle mass and cardio is a great way of delivering the nutrients to your body.

When I get home I then take the suggested one serving of BCAAs in my post workout shake.

Here is a good Xtend FAQ with suggested Xtend dosing/timing in case your interested.