Sounds like she going well.
First off I wouldn't be too concerned with the scale, " another 15Lbs" can be alittle off putting. What we are looking for is body compostion, how much of the body is fat and how much is lean muscle, so what you g/f wants to do is minimise fat and maximise lean muscle.
IMO when on a fatloss programme, CV should be completed first thing in the morning on a empty stomach. And OTC fatburner can be used halk an hour before the session to help speed the process up. I suggest she doesn't eat until 30-45 minutes after the session has ended to maximise fat burning.
IMO sessions of 30-45mins are better, 3-4 is fine. I personnally like to add variety to my CV and will cycle three peices of equipment within the session. I will complete different programme for each peice, i.e HIIT, Fat-Burning (50-60% of max), or Take my heart rate to 70-80% of maximum.
For a woman the maximum HR is calculated as 226-Age, E.g 226-26 = 200 therefore:
50% = 100BMP
60% = 120BMP
70% = 140BMP
80% = 160BMP
Another thing, look at her diet is eat clean? is she eating small regular meals to increase her resting metabolic rate? Minimise carbs, and ensure the is enough protein to avoid/minimise muscle break-down.
I personnally train heavy, this maximises lean muscle gain. I train with a weight I can perform no more that 12 reps with, I aim to hit 8-12 reps. I do three sets and normally the last set will include force reps.
I believe a woman can train relatively heavy and still remain feminine, but will have the benefit of increasing lean mass, which will have the knock on affect of increases metabolic rate and fat-burning potential.
Hope that Helps!
