Ok since she needs to lose alot then I assume her cardio vascular endurance isnt very high. you will want to start her out slowly, maybe even walking every other day. If you try and get her to do HIIT or anything intense right off the bat she will become discouraged and lose interest.

I would also say her diet would need to be different. A CKD would be my first choice, with limited carb up. Once a significant amount of fat is lost, and her cardio ability is raised, then something more balanced like a 40/30/30 would work fine. It will need to be done slowly, in steps.

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