Does anyone know of a good Yoga video to buy that will actually help you lose weight and get your body tone?

Of course my New Years resolution is to lose weight I want to do yoga in-between my running.

Could anyone find me a good yoga routine to strengthen my surfing?

Just so you know, I’m thirteen, great are cardio, but just not that strong in my core. Strengthening it would be very helpful. I’m an inexperienced yoga student but will learn fast. And I want something that would only be up to twenty minutes a night.

Thank you! If you have any other excercises you think would help, please tell me!