Is your warranty run out?

As most of you know, I am an xray tech; I've worked both in hospitals and clinics, the clinic stint being the most recent. There is alot of differences in the jobs in the type of people you see, and i've been learning alot about consequences from that. In the hospital I would see the immediant results of our foolishness of course--broken legs, whatever. Now in the clinic, I am seeing the results of those injuries in the longterm...how they affect us years later, or even continuously from the original injury. How one injury causes us to favor a part, which puts strain on another part, causing more issues....you get the picture. Remember that song ' the knee bones connected to the leg bone.....'
My co-workers and I have a theory; your warranty is up at 40. Just like a car, it seems, things start to go wrong as soon as the warranty is up. Knees, hips, back, neck. Oh yay. But not everyone is the same, just like cars. Some of us are lucky and are honda or subarus....may not come see me till 60! Some are chevys and fords; not so lucky. But I am really starting to see the benefits of early 'good maintenance'. Taking our vitamens. Drinking that milk. Eating our veggies. But especially the benefits of that at a very young age. Like doing all the maintenance checks and programs the dealership gives you to do on a new car. Its not going to keep your car perfect forever, but it avoids alot of problems later. I see that in our own bodies too; how laying a good foundation for ourselves when we were young with our health helps so much in later years. Not that it isnt good later too, dont get me wrong, but essential for our kids.I read somewhere that we 'set' our bone density/strength in the ages of 11-13. So if our kids are drinking 1 glass of milk(1/3 of the recommended intake) and drinking 2 pop (which has high potassium? I think it was, that actually causes the body to dump calcium) then they are dumping out more calcium then they are taking in. I never knew this as a kid!
It seems we have to be deliberate in our health and our parenting too--setting goals for what we want for our children, what we wish them to learn and benefit from. What do we wish them to learn from the mistakes we've made or the aha! moments. Sounds alot like the black belt cycle of success doesnt it?