The Grateful Dead, Should We Be Grateful?

Jojo's Bizarre Adventure and lifetime wellness aren't the first things you think of when you think of a formidable stand battle, but they relate more than you think.
This semester we've been talking about impairments, elderly impairments to be specific, and if you've watched the last episode of Jojo, or read the manga you'll start to see how this relates.

What I am talking about is The Grateful Dead.

The Grateful Dead's main ability causes organisms to forcibly age. Once its ability activates it can age you mentally and physically, it ages you according to your heat, the hotter you are the faster you age, the cooler you are the slower you age, if your cold enough you can stop aging completely.

Since it rapidly ages things that should deteriorate over time, such as: bones, joints, skin wrinkles, cognitive ability, and ability to eat- it causes arguably more damage than if they were aging naturally. 

The interesting part of the Grateful Dead's power is how it effects each person differently. Narancia gets hard of hearing, while complaining how stiff his shoulders feel. Abbacchio, and Fugo, fell asleep. Giorno got more tired and stiff, while for the most part maintaining cognitive ability. Mista while being stiff, has full cognitive ability and physical ability, his only impairment was being slower. Bruno is the same way.
We do have to take in to account that they were aging at different speeds.
 The next part I want to discuss is the way other passengers age. While Bruno's gang (for the most part) ages well, the same cannot be said for other passengers. Other passengers of the train aged extremely fast, and aged poorly. While 3/6 members of Bruno's gang remained adequate, every passenger on the train was reduced to piles of skin and bones- not literally of course.
The passengers, had almost immediately shown signs of aging, and within the first 5-10 minutes where at the point where there joints where to stiff to move.
I believe this is because of Bruno's gangs peak physical condition.

The Grateful Dead, in some ways, expresses how we should take care of ourselves now, so that we wont be a pile of bones in the future, that's lifetime wellness.