I personally perfer the sitting meditations, but I continue to do the active meditations.
From the audio material in level I (I'm pretty sure it's level I) Master Lin says that when you do the sitting meditations you are opening channels and increasing your capacity to qi to flow. During active meditations you are moving the energy and filling your channels.
I think it is improtant to do both. Master Lin says that you good practice will have twice as much time on sitting meditations as active.
I would say that someone working with blockages to improve their physical health should shift the balance to include more active exercise.
You are perfection.
Iam2 
