Hi D,
I totally agree with you about listening to your body. There is though, great wisdom within qigong practice, and one can find activity to pursue if the will power,or desire, is there. Not all exercise is 'active', and meditation is as easy as closing your eyes and breathing. It does take physical energy to do active exercise, and 'feeling' like doing the exercise is better than forcing anything. I think if you continually practice qigong in your life though, you tend to , as habit, find ways to actively involve yourself, in whatever you are experiencing, and take an active role in making it as good an experience as possible. This is the 'work' part, but also, has its rewards. The least one can do, is put out a prayer, and let the master's energy take over. You are still practicing qigong in the sense of your continued awareness, and your connection to the master's energy may take you to further activity you didn't think you feel like doing.
love,
gallen