Hi, thank you for answering my questions.
If she really has tried to lose weight with absolutely no results, she would be well advised to visit her doctor for an exam and some simple blood tests to determine if there is a cause for this.
Otherwise, she will need to take a hard look at some things to find out why she is gaining, or not losing.
She is physically active, so this is very good, and better than most. However, if you eat more than you need even when active, you will still gain. So, she will have to actually weigh herself, record it. And then start a food diary to determine what, how much, how often she is eating. Then weigh herself again. It may take about a month of keeping a food and weight diary to see where the problem is.
To start with, here is a tool to help her with a diet that will promote weight loss:
Mayo Clinic Healthy Weight Tool
She just needs to fill in some information about herself and it will give her the amounts of different foods she needs to eat. There is also a 4 page document she can print out that lists some foods from each group, with the serving sizes.
Losing weight can be a challenge, but it is very possible to do. The problem for most people is that it does take some time and attention and you need to be persistent.
---She needs to weight daily or weekly.
---She needs to eat everything within the pyramid plan. Balance of food groups is important for weight loss and to make sure your body gets what it needs to function properly (which includes maintenance of a good weight).
---She will need to read labels of any foods that have a mixture of ingredients.
---She needs to eat breakfast within an hour of getting up, and should eat at least 3 meals a day.
---She needs to write this all down daily, so she can evaluate her progress at least weekly to see where she can make changes to help reach her goals.
---And she needs your support to get all this done. It becomes easier as time goes along---but recording everything is very important. It helps you stick to your plan, and it also shows you the results. Its too easy to tell yourself that "this little bit of _______ won't hurt, just this once." But those little bits can add up.
Another tool to help: CalorieKing.com Its free to use, and list just about any food you can think of with nutritional information that she will need (calories, grams of protein, carbs, fats, sugars, etc).
Also, running is a good activity. But she might want to consider some weight training as well at least 3 times a week to build muscle that will help speed up her metabolism.