1 Cor 9:26-27: "Therefore I run in such a way, as not without aim; I box in such a way, as not beating the air; but I discipline my body and make it my slave, so that, after I have preached to others, I myself will not be disqualified" (NASU).
Everyone knows we ought to practice spiritual disciplines such as quiet time, prayer and Bible study, but how many of us consider physical discipline as an important example for our children. What type of model do we present when it comes to eating and exercise? Sometimes we have to give up the good for the better. Passing up an extra helping and spending some time in the gym may be the types of activities that can make you a better parent and a better witness for Christ. With the popularity of video games and the proliferation of TV channels, your kids could use a little time outside - how much better if you train yourself to go with them.
A Spirit-filled mind and a disciplined body are a formidable opponent for the enemy.