Mark L. we may be getter weaker but we are living longer, if your are talking weak as in physical strenght it doesn't matter with our tehnology, and if you look at the work people did 1000 years ago they lifted rocks and other heavy shit thats why they were stronger, we push a button and the jobs done, we don't do as much physical labour.

And basically yes we are what we eat, look at the asians yes there are fat/unhealthy ones but they eat all our western food but the ones that eat traditional food are healthy, and live longer, also they do tai chi etc.

But if people were smarter and ate the right food and exercised even a little bit a day we would be stronger and healthier. most westerners don't see the importance in exercise that's why most are obease and fat.