For you personally, maybe not, but statistically yes it does.
There are populations that consistently outlive and the only other thing I would add is stress removal in the form of relatively simple life styles.
and how do the effects of these interventions compare with normal variability of the lifespan in normal people?
At some point you have to wonder about the costs. Denying yourself everything that's nice and pleasant, and exercising constant, total active control over yourself sure might prolong your life, but what's the point?
If the populations that you're talking about are the famed "blue zones," then the most likely reason for it is poor record keeping: https://jheor.org/post/2682-ig-nobel-prize-winning-research-...