Visit yahoo link:http://news.yahoo.com/s/ap/20110124/ap_on_sp_ot/us_obit_jack_lalanne
Jack is an example of what an old man should be. Maintaining a high quality of life until his death at 96. Most old people would be struggling to simply walk at 70yrs old. He is able to enjoy life, do the things he wants to do, the same way a teen would explore his world. I will leave it to readers to discover (google) more about Jack.
While I admire his status to the end, I believe that with further tweaking he could have lived until 120. Some tweaks can be found in this blog.
Morituri te salutamus!