What the Bible tells us is Adam and Eve were created perfectly healthy—no diseases, illnesses, genetic mutations or such. The world did not suddenly leap to conditions of today where, due to inward and outward conditions, life is cut shorter. Today, a few people reach 115 years old or so. If this happens to a few today, how old would people become in near-perfect living conditions several thousand years ago with sin’s curse only beginning to affect their health?

Of course, this is a young earth view. 🙂

In the beginning the tree of life was also in the midst of the garden, and if, Adam and Eve had made the correct choice they would have lived forever. We know that, that tree represents Jesus Christ. 

I believe that the lifespan of that generation was shortened because the wickedness and the corruption of mankind grew worse, and worse in the earth.

In the six chapter it is revealed that God was grieved and expressed His sorrow that He created mankind and decided to destroy them. He said "my Spirit will not always strive with man."

Sin always brings forth death and inevitably cuts short the life that God has given us. 

@SpecFictionGuy

I myself have a y.e.c. view. Yeah I was thinking how much healthier the food would have been then with none of the preservatives added and how much cleaner the air would have been to breathe without all this pollution in it. 

The water was probably sparkling from superb freshness 😊 

Good answer man - I like it 

Here are a couple articles from Answers in Genesis, a Christian apologetics website, that talk about their ages.

https://answersingenesis.org/bible-timeline/genealogy/did-adam-and-noah-really-live-over-900-years/

https://answersingenesis.org/bible-questions/why-did-people-have-shorter-lives-after-flood/

Donna, i definitely agree with U. Separation from God brings death - both spiritually and physically.