There is a whole book written about this. There are several conversations in the book with this same professor. I would definitely say this book has changed my life.
In more than a few places, I was pretty sure that book was written specifically for me. My dad was in the process of getting knee surgery right when I picked it up. There was a section that detailed a doctor visit the author had, where the doctor told him his only recourse was to have the same surgery my dad was having. Two years later, the author (who didn't have the surgery) is still running barefoot around central park, yes on asphalt and concrete and any other substrate you can imagine. My dad is not. My dad used to come home and run for hours every day after work. Now he doesn't run at all.
Just thought I'd share some points in the book that I love and find relevant to this discussion so far...
Not mentioned in the article but Lieberman talks about it in the book, is the fact that all four-legged animals can only breath one time per stride. A running cheetah operates like a large bellows. When he extends, his diaphragm (which is attached to the pelvis) pulls back and forces the lungs open, forced inhale. When they stride, all their organs literally slosh forward in their horizontal bodies, compressing the diaphragm, forcing an exhale. Humans standing upright allows us to breath whenever we feel like it while running. No other animal can do that.
Also about the Man vs Horse race. Unless the dude sitting on the horses back is a sumo wrestler, it probably doesn't count for much. A horse that is 1200lbs of muscle has a 150lb man sitting on his back. That's equivalent to wearing a 10lb backpack. I'm not saying you wouldn't notice it, but you can't blame the backpack for losing the race. The real reason is that a horse can only outrun a human for 10-15 miles, at which point the horse has to slow down to a maintainable pace, or die. Humans have no such restriction.
And as for running on asphalt - we have the best shock absorbers science has ever seen...they're called knees. Air cushioned soles and arch support, pronation and supination control, torsion bars, built in computer chips to monitor your (incorrect) foot strike and adjust the shoe on the fly are all awesome - if you won't be needing your feet ankles and knees in old age.
I don't recommend many books, but read this one. Even if you don't run, hate running, have never run in your life. You will love your feet when you're done.
There is a whole book written about this. There are several conversations in the book with this same professor. I would definitely say this book has changed my life.
In more than a few places, I was pretty sure that book was written specifically for me. My dad was in the process of getting knee surgery right when I picked it up. There was a section that detailed a doctor visit the author had, where the doctor told him his only recourse was to have the same surgery my dad was having. Two years later, the author (who didn't have the surgery) is still running barefoot around central park, yes on asphalt and concrete and any other substrate you can imagine. My dad is not. My dad used to come home and run for hours every day after work. Now he doesn't run at all.
Just thought I'd share some points in the book that I love and find relevant to this discussion so far...
Not mentioned in the article but Lieberman talks about it in the book, is the fact that all four-legged animals can only breath one time per stride. A running cheetah operates like a large bellows. When he extends, his diaphragm (which is attached to the pelvis) pulls back and forces the lungs open, forced inhale. When they stride, all their organs literally slosh forward in their horizontal bodies, compressing the diaphragm, forcing an exhale. Humans standing upright allows us to breath whenever we feel like it while running. No other animal can do that.
Also about the Man vs Horse race. Unless the dude sitting on the horses back is a sumo wrestler, it probably doesn't count for much. A horse that is 1200lbs of muscle has a 150lb man sitting on his back. That's equivalent to wearing a 10lb backpack. I'm not saying you wouldn't notice it, but you can't blame the backpack for losing the race. The real reason is that a horse can only outrun a human for 10-15 miles, at which point the horse has to slow down to a maintainable pace, or die. Humans have no such restriction.
And as for running on asphalt - we have the best shock absorbers science has ever seen...they're called knees. Air cushioned soles and arch support, pronation and supination control, torsion bars, built in computer chips to monitor your (incorrect) foot strike and adjust the shoe on the fly are all awesome - if you won't be needing your feet ankles and knees in old age.
I don't recommend many books, but read this one. Even if you don't run, hate running, have never run in your life. You will love your feet when you're done.