We'll pretty much believe whatever Jane Fonda tells us at this point, because girl has eaaaarned it!
Plus, she's 100% right: staying active is one of the most important parts of aging. We've seen it over and over again how someone who was very healthy starts to decline fast the moment they retire — unless they keep up the pace!
Jane says that exercise itself is the most important part of her daily routine as she ages, and at 75 while looking like that… we believe her!!