A great Jack LaLanne video.
http://abcnews.go.com/Health/Wellness/walking-speed-predicts-longevity-elderly/story?id=12539377
For this reason, scientists consider how quickly a person walks, when correlated with age and sex, a reflection of their underlying health.
Someone like Gerjouy(92), for example, who at his age still strolls comfortably at about 3 miles per hour, can expect to enjoy another seven years of life. In contrast, a 75-year-old man who barely shuffles along at less than 1.0 mile per hour may not make it to his 80th birthday; and a 75-year-old woman who can keep pace with Gerjouy may look forward to celebrating another 18 birthdays.
"In fact, speed of movement seems to be linear, with each increase correlating with an increased prediction for years of life," Studenski said.
And when I fell off my bike and was hobbling with a four-pronged cane at about .5 mph, I probably had a life expectancy of 1 year.
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