The most important facets for an extended life , I do believe, are partly in the genes; number two is life style, which includes healthy diet and normal exercise. I go, work and swimming every day. However, I think too much exercise is also harmful due to over-stress; occasionally those who workout too several hours per day die early.
The wonderful thing about’Arrow’is we never say never on the show. Preferably the show could have a wonderful extended life , and all method of points could happen.