thomas lawyers said geneticsly account for partly of it. >> maintaining a weight. >> reporter: that includes healthy eating throughout life and shaking bad habits early on. a second factor be active like marvin fisherh birthday was at a pool where he swims. when he is not at the pool, he volunteers. >> that's not a complete scag racing, since he started here at the age of 96. the retired businessman is master of the records room. >> i get all the folders ready for the people who are coming in the next day. >> when they leave they put the folders back in my room, but file them. >> reporter: his volunteer works illustrates the third element. stay connected to other people. >> people who are more engaged and connected socially with family and friend networks tend to live longer, healthier happier life. fisher who who is is a widower dines out with friends and has a relationship with a widow in his apartment complex. fisher said don't think about what you've done, but what you want to do. tamala edwards channel 6 "action news." s a wake system... and a sleep system? science suggests when you have insomnia, the neurotransmitters in your wake system may be too strong, which may be preventing you from get