So your kids have been joining in anyways, why not make a workout that includes them? Fair warning: you have to show up willing to play.
You may be familiar with the Michelle Obama's "Let's Move" program. She is on a mission to eradicate childhood obesity, and has invited the faith community to get involved. Of course Revelation Wellness is going to meet that call.
It is important that we model healthy living to our kids. Even more important it is that we have continual dialogue about WHY God would want us to live healthy & whole lives. We challenge you to explain to them how God's word is not only our health in being, but also our health in doing. That old adage is true "You are what you eat."; when we participate in a well balanced diet and exercise plan, we are well fueled to get the task of giving and receiving love well.
And if we may add one to your list of sayings "What you do, you become." Making the harder choices is an exercise in obedience. Obedience rarely goes down the path of least resistance. Give your kids an opportunity to "workout" their love for God and others and who they are in Christ, as they feel their bodies heat up and push against that path of most resistance.
Jesus is the remedy for all of our ailments. We, the church, are the vehicle to dispense his healing love. Start at home first and then let the ripple effect take over.