If fat loss is your goal you need to train the whole body every workout. The more exposure each muscle has to exercise the bigger the adaptation it makes, so don’t just train each muscle once a week. If you do train the whole body every workout just remember to give yourself 48hrs rest between sessions to let you body recover. Why train each muscle only once a week? Would you do cardio once a week and expect results?
Supersets
Superset means performing two different exercises in sequence rather than doing all the sets of a particular exercise one after another, e.g. squats then chin up’s. The good thing about using supersets is that you are using different muscles in succession. Each muscle gets a chance to recover while you work another muscle, therefore you can decrease the rest periods which will keep your heart rate high and supercharge your metabolism. Another benefit of supersets is that your recovery rate will increase and you can perform the same workout in a shorter amount of time.
Big Bang for Buck Exercises
Use large compound exercises which use more than one muscle group. These include squats, deadlifts, pushing and pulling exercises, rotational movements and combination lifts. These Big Bang exercises recruit a great deal more muscle than machine weights and isolation exercises, which will in turn ignite your metabolism. Isolation exercises such as bicep curls and leg extensions only use one muscle group at a time.