Someone trying to lose weight should start working with circuit training with a cardio base.
cycle, bench, elliptical, bent rows, treadmill, shoulder press, cycle, ab work, elliptical, push ups on ball, cycle, squats with push press etc,
you can add or delete as needed, move from one exercise to the next. start with 1 circuit up to 10 or 15 minutes. then add each week till you are close to 1 hour.
RDP