Looking at old family photo albums, many of today's 75-year-old seniors look like 60 years old in the past. I smoke less and take care of my skin moreThe sharp decline in the proportion of baby boomers smoking also affected it. In particular, the aging process of the baby boomers, the second oldest participant, was most clearly delayed. This means that 60 years old cannot be fully biologically 50 years old, but 56 years old, The Times said. Rather, the health of younger generations than baby boomers may deteriorate, The Times analyzed.