Our advice to you would be don’t spend an hour jogging on the treadmill then meander over to the weights area to do a few bicep curls.
In doing so you will be targeting a small muscle with a low calorie expenditure.
Start off in the weights area and go for the most physically demanding exercises i.e. squats, deadlifts etc.
Should you only be doing 2/3 sessions per week go for full body routines. If you are going for 4 sessions a week try an upper/lower split.
Should you have any energy left get on the treadmill for some low intensity cardio.