生命延续指增加生命的最高或平均寿命，特别指人类的寿命。

生命延续的方法主要是减少老化和衰老的过程。延长平均寿命的方法主要包括实行健康的生活模式（例如饮食均衡，做适量的运动，充足的睡眠，不吸烟、减少饮酒）。此外，服用抗老化药物、以及卡路里控制，也是延长寿命的主要策略。

另外，繁殖生育亦可看作一种生命延续的方式，不过只是延续父母和祖宗的遗传基因及人类群体，而非延续个人生命。

Life extension science, also known as anti-aging medicine, indefinite life extension, experimental gerontology, and biomedical gerontology, is the study of slowing down or reversing the processes of aging to extend both the maximum and average lifespan. Some researchers in this area, and "life extensionists", "immortalists" or "longevists" (those who wish to achieve longer lives themselves), believe that future breakthroughs in tissue rejuvenation, stem cells, regenerative medicine, molecular repair, gene therapy, pharmaceuticals, and organ replacement (such as with artificial organs or xenotransplantations) will eventually enable humans to have indefinite lifespans (agerasia) through complete rejuvenation to a healthy youthful condition.