Maybe if you amputate your legs or catch AIDS or syphilis in the process. Otherwise, I can't see how losing 50 pounds will leave you less healthier than before.
At the very least, doing regular body-weight resistance training (pushups, situps, pullups, air-squats), helps to reduce the amount of muscle you are losing while you are losing weight.
Can you explain why archaeologists, astronomers and professors have the highest life expectancy and athletes and body builders have that among the lowest?
That's a pretty serious statement hidden as a question. Can you point to your source(s) claiming this to be true? I am sure a huge % of HN population would be interested in this.
For those interested, I found parent's claim very intriguing so I spent a few minutes Googling and the best I came close to answering yes/no was this -
The life-prolonging benefits of a scrupulous life have come to light from a comparison of 20 previous studies which together rated 8900 people for conscientiousness using a standard psychological survey, and also recorded the age they died.
Howard Friedman and Margaret Kern at the University of California at Riverside found that people who were less conscientious were 50 per cent more likely to die at any given age, on average, than those of the same age who scored highly (Health Psychology, DOI: 10.1037/0278-6133.27.5.505). This exceeds the effects of socioeconomic status and intelligence, which are also known to increase longevity.
https://www.newscientist.com/article/mg20026794-800-conscien...
Do elite athletes live longer? TLDR; - In most cases, not really http://www.athletesheart.org/2013/11/do-elite-athletes-live-...
https://www.quora.com/Which-professions-have-the-longest-lif...
Being underweight is dangerous, just as being overweight is dangerous. Instead of heart disease and joint damage, you end up with osteoporosis, anemia, etc.
Losing weight without paying attention to nutrient intake and balance can have similar effects, even if you'd be at or above healthy weight losing 50lbs.