Can you break this down for me sesame street style? 31 year old alcoholic idiot here...
1) Don't drink so much.
2) Not all of our genes are active. For example, if you exercise then certain genes activate (presumably ones that say 'big muscles?').
3) When we get old, our 'aging' genes activate.
4) These scientists found a way to 'deactivate' the aging genes.
I have no idea if that made more sense. I don't think this is the only problem with aging, though; here is a list of known problems.