Alan Thicke — Canadian Actor born on March 01, 1947,

Alan Willis Thicke is a Canadian actor, songwriter, and game and talk show host. He is known for his role as Jason Seaver, the father on the ABC television series Growing Pains. He is the father of actor Brennan Thicke and singer Robin Thicke. In 2013, Thicke was inducted into Canada's Walk of Fame... (wikipedia)

Fitness needs to be perceived as fun and games or we subconsciously avoid it.
Family involvement is a valuable thing and playing together actively can be the '90s version of it. Instead of just watching, you can do it together... something we don't spend enough time on. We can motivate and excite each other about fitness.
If it is a first offense, you ground them and have a talk. The second offense would call for counseling.
If one tends to be a humorous person and you have a sense of humor the rest of your life then you can certainly lighten the load, I think, by bringing that to your trials and tribulations. It's easy to have a sense of humor when everything is going well.
I'll be on my third honeymoon, so I'm more of an authority than I care to be.