Weights or Cardio First
Hey Josh,
If your goal is to lose weight as quickly as possible I would suggest doing your weights first followed by your cardio (after doing a cardio warm up of course). Here's why:
Since having the body in a mildly hypoglycaemic state is conducive to achieving maximum fat loss, performing cardiorespiratory (aerobic) exercise after a resistance (weight) training session is beneficial.
Weight training is a high intensity activity and, as exercise intensity increases, so does the proportion of carbohydrate that is used as a fuel source.
Therefore, during resistance training your body will use carbohydrate as its main source of fuel. Accordingly, your body’s carbohydrate stores will become depleted from the resistance-training workout and your body will be forced to use more of its fat stores as a fuel source when the cardiorespiratory exercise begins.
I hope this helps mate.
Regards,
Steve.