[dredmorbius]

No.

The one proven thing you can do to live longer is to not die.

Risk prevention / avoidance is a large part of this, but that includes a lot other than bodyweight. Seat belts, condoms, not smoking, little or no alcohol/drugs, pollution.

Several long term athlete studies show longevity, and quality of life benefits, to exercise (Stanford runners study, Scandinavian olympian study). And the specific mechanism of calorie restriction, telomere repair, is shown in both cardio and strength training.