Excersize Advice: Bicycle machines

Re: Excersize Advice: Bicycle machines

So it actually is true? :|

I have a friend, who is super-slim...and no...she wasn't born slim...she was quite obese at a time, and used to weigh over 70 kgs, then she reduced her weight through diet control and exercise, and now weighs 46 kgs, she is the source of this information, and since she is quite into working out, diet control and all, so I couldn't really ignore what she said. She says that walk is the best thing to keep weight under control, and cycling shouldn't be done for more than 10 minutes a day and ab king pro for 5 minutes a day, as it can transform fat into muscle...:|

Now what do you people say about it?

I'm not over-weight myself, but I DO wish to have a flat tummy, which is just not possible without exercise, so which exercise should I go for? Suggestions/advice...anyone?