There have been numerous articles such as You Walk Wrong, Your shoes are killing you which promote the benefits of going barefoot or wearing minimalist shoes. These articles note out feet is well engineered and actually does a better job on removing stress from your knee and hip than cushioned shoes. They often add that traditional shoes with heels forces people into an unnatural position which is less efficient.
The Harvard Skeletal Biology Lab has a lot of information about foot strikes and biomechanics. There was also a very interesting study published in Nature which examines Foot strike patterns and collision forces in runners whose stride is different than hikers, but I think this has some interesting information. The book Born to Run has gotten a lot of play in the running community touches on issues related to barefoot running. Other studies have suggested that while running is more efficient on the balls of our feet, that walking with heel strikes is more efficient, The Effect of Running Shoes on Lower Extremity Joint Torques.
Some people go fully barefoot not just when walking, but running, backpacking over terrain which many would expect to be painful. There are a variety of resources such as barefooters.org. barefootted.com, The Barefoot Hiker is free on the web or you can buy the physical book. I don’t have a lot to add on this topic because I don’t got barefoot except in my home, at the beach, and at the pool.
vibram fivefingers has been a cult hit. The soles of five finger shoes looks like the bottom of our foot, down to a separation between the toes. There is a nice beginner’s guide to five fingers for people getting started with these shoes.
There were many things I loved about wearing Five Finger shoes. The first was a sense of freedom, and the sensory experience on walking in them. I felt more connected to my environment. I felt more free. I also loved that I stopped getting blisters between my toes.
There were some downsides. The first was several members of my family teased be able how ugly the five fingers were. Second, they take longer to put on because you have to line your toes up. These were pretty minor. More important was that the original model used a mesh on the upper that let trail dust into the shoes. After an hour or so the dust would start to function like sandpaper forcing me to stop and clean off my feet. I found the Five Finger Spyridon addressed this problem. I used the Spyridon for trail running, hiking, and backpacking for several seasons.
The major problem I found with Five Fingers was that I was regularly stubbing my toes. A more traditional shoe spreads the force of impact over all the toes making it much less lightly that one toe will be traumatized.
The most minimal shoes are the classic, sole-less, suede moccasins. When I starting using minimalist shoes there weren’t many options. Besides moccasins the only choices were ballet slippers, track shoes, Feiyue shoes and the original Vivobarefoot tennis shoe. These might have been ok for walking around inside or around town, but all had serious traction issues in the back country.
I believe Inov-8 was the first company to make minimalist shoes specifically made for outdoor sports. These shoes had zero drop, thin soles and lot of flexibility. I went through 14 pairs of the Inov-8 Flyroc before switching to the Altra shoes I now wear.
Today there are many options for minimalist shoes. Main stream companies like New Balance, Merrell and Nike have minimalist models. There are several cottage manufacturers or start-ups like Xero Shoes, LEMs Shoes and Soft Star that only make minimalist shoes. Carets even make a zero drop shoe that looks just like a classic dress shoe. After Born to Run was published, there are a number of companies that started making minimalist versions of Huaraches sandals such as Earthrunners, Luna Sandals, and Unshoes.
While very different from the minimal shoes above the MBT shoes might be a good way to strengthen your feet around town in preparation for time in the field with a more flexible soled shoe. I would not wear MBT in the back country.