It's more that the cardiovascular benefits aren't the same. After a point, your heart, vessels, and lungs just aren't going to improve, no matter what you do. You've got damage done, and reduced ability to heal.

So, if you can cut excess fat in your eighties, it's still a good thing. But it isn't going to reduce heart attack and stroke risks, at least not to a detectable degree.

There had been debate about where that wall is, and probably still will be after this. But good evidence of heart protective benefits in middle age from eve small body fat reductions is really good news. The amounts they're talking are actually achievable with only minor medical intervention too. Won't be easy, but dropping 5ish% can bea achieved way easier than the bigger numbers most people get told they need to cut to do anything useful.

When it comes to managing heart health and risks, having something like this become part of the decision tree is going to change a lot of people's outlooks for the better.