Are running shoes good enough? On one hand they protect our feet and soles and provide comfort but on the other hand they seem to change our natural running style and harm us in the long run.

While analyzing the running abilities of 'Tarahumara' tribe, who are incredible runners covering distances above 100 miles in a single stretch, a team of experts made a startling observation that running shoes may be affecting our running style and may lead to running related injury in the long term.

Below is a video excerpt of the documentary that says it all.

While this observation should not raise an alarm against use of running shoes it certainly throws a new challenge at those developing better shoes for runners.