Traveling between stars at sub-light speeds poses significant challenges when it comes to the limitations of human lifespan. The vast distances between stars mean that even traveling at a fraction of the speed of light would require journeys spanning several decades or even centuries.
Given our current understanding of biology and aging, it is highly unlikely that an individual could live long enough to complete such interstellar voyages. Human lifespans are limited, and the effects of aging, combined with the potential hazards and limitations of long-duration space travel, make it improbable for a single person to embark on such a journey and survive to reach another star system.
However, it's worth noting that there have been discussions about the concept of "generation ships" or "multi-generational starships." These are hypothetical spacecraft where multiple generations of people would be born, live, and die during the course of the journey. The idea is that the descendants of the original crew would continue the voyage until they reach the destination. Such an approach could overcome the lifespan limitations of individuals, but it would introduce other challenges, such as maintaining a self-sustaining ecosystem and ensuring the well-being of the crew across multiple generations.
In summary, while it's currently beyond our technological capabilities and the limits of human lifespan to undertake interstellar travel at sub-light speeds, the concept of multi-generational starships remains a topic of scientific and speculative exploration for potential future advancements.