Damiano Machiavelli said:
That bolded part is absolutely laughable. Do you think that the hundreds of millions of dollars, perhaps even billions of dollars, that Nike has expended on R&D was spent to make shoes that promote injuries? You do not think that one of Nike's competitors would take advantage of that, make a shoe that produces less injuries, and market the hell out of it? I suppose they are all in cahoots with each other.
Have a look at some of the studies done on the relationship between shoes and running injuries.
For a start, there was Marti's study of 5000+ runners in Zurich in the 1980's:
MARTI, B. “Relationships Between Running Injuries and Running Shoes – Results of a Study of 5,000 Participants of a 16-km Run – The May 1984 Berne ‘Grand Prix’”. In: Segesser B., Pforringer W., eds. The shoe in sport. Chicago: Year Book Medical Publishers, 1989: 256-265
... then a few years back, a bunch of researchers at medical school in Dundee, Scotland came up with this:
Do you get value for money when you buy an expensive pair
of running shoes?
Richard Clinghan, Graham P Arnold, Tim S Drew, Lynda A Cochrane, Rami J Abboud -
http://www.beginrunning.com/shoes/cheap-running-shoes-compared-with-expensive/#axzz1WdLV79nZ
These reports/studies basically said that users of cheap shoes without all the crap that the shoe makers put in reported at worst the same level of injury through to a significantly lower level of injury than users of high priced shoes. Put another way: all that **** that Nike puts in isn't worth it.
A more recent study even found that modern running shoes put more strain on the joints than wearing high heel shoes. That study is:
The Effect of Running Shoes on Lower Extremity Joint Torques - by D. Casey Kerrigan, MD, Jason R. Franz, MS, Geoffrey S. Keenan, MD, Jay Dicharry, MPT, Ugo Della Croce, PhD, and Robert P. Wilder, MD. PM&R: The journal of injury, function and rehabilitation, Volume 1, Issue 12 (December 2009) -
http://www.pmrjournal.org/article/S1934-1482(09)01367-7/fulltext
In pretty much each case, the culprit was seen to be the overly padded soles and raised heels in modern running shoes - and you'll note in the Scottish study that they said that all of this stuff lulls people into a false sense of security and encourages poor running style.
And as for why a company would spend money on all that research. Simple:
- people want to buy a good running style rather than putting in the long boring hours of drills to get it - and you can sell that with anti-pronation, cushioning, bull**** stuff;
- it is cheaper for Nike to try to out research/out-gadget Asics (or any other combination of shoe makers' names you want to use) than it is to fight them on price - especially because consumers are prepared to pay more for having shoes loaded with more of the unnecessary crap.