The most important factors for an extended life , I think, are partially in the genes; number 2 is life style, which includes healthy diet and normal exercise. I go, work and swimming every day. Nevertheless, I believe a lot of exercise is also unhealthy because of over-stress; often individuals who exercise too many hours per day die early.
The nice point about’Arrow’is we never claim never on the show. Hopefully the show will have a great extended life , and all method of things could possibly happen.