This is a very interesting study.

As a practicing cardiologist over so many years,

I've been preaching fast walk, not slow walk which

can only aggravate the venous insufficiency or varicose veins.

However, for the elderly in 80's any walk of any speed 

would be far better than no walk or sitting or lying around.

For seniors in general walking 3-4 miles in an hour would be

an ideal.  

Basically it boils down to a life long war for earthlings to

fight the earth gravity.

It is a war we all eventually lose but have no choice but to fight

until the end.

https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fjamanetwork.com%2Fjournals%2Fjama%2Ffullarticle%2F644554&data=02%7C01%7C%7Cdfd3f7b7ddf44e56d5af08d754b11fad%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637070992018543438&sdata=tFJqf9Q4tRzaZJWOFs2PztVDvJIOZTiiJvlNF12Z0D8%3D&reserved=0
 

Results There were 17 528 deaths; the overall 5-year survival rate was 84.8% (confidence interval [CI], 79.6%-88.8%) and 10-year survival rate was 59.7% (95% CI, 46.5%-70.6%). Gait speed was associated with survival in all studies (pooled hazard ratio per 0.1 m/s, 0.88; 95% CI, 0.87-0.90; P < .001). Survival increased across the full range of gait speeds, with significant increments per 0.1 m/s. At age 75, predicted 10-year survival across the range of gait speeds ranged from 19% to 87% in men and from 35% to 91% in women. Predicted survival based on age, sex, and gait speed was as accurate as predicted based on age, sex, use of mobility aids, and self-reported function or as age, sex, chronic conditions, smoking history, blood pressure, body mass index, and hospitalization.

https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fjamanetwork.com%2Fjournals%2Fjamanetworkopen%2Ffullarticle%2F2752811&data=02%7C01%7C%7Cc2ed771659fd4a61b0d008d754b0a4e1%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637070989957988997&sdata=3HH3Ywzms190e2wY1DxTDIlu2VBs%2FHc11zhx7ZxiSQc%3D&reserved=0

https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2752818

They never mentioned the fact that they "might" walk slowly because they are "already" in bad health.

The fast walker may be in excellent health and that's why they can walk faster.

Naturally, a dying person will walk much slower because he is dying.

Please don't say that he will die soon because he walks slow !!

This could be a "chicken and egg" situation. They should have considered it before making a conclusion.

These researchers are hardly being "scientific" scientists. 

Also, the title of the article may be somewhat misleading. 

"Your Walking Speed Can Tell You How Fast You're Aging"

Here, it sounds like a fast walker ages faster by just reading the title.

Am I stupid (very possible) or are they stupid? They should rather have said:

"Your Walking Speed Can Tell You How Fast or Slow You're Aging"