Humans have gone unshod for millions of years; it is only in the last few centuries that people have started wearing shoes. However, a recent survey shows that shoe wearing among young boys isn’t universal. German children and teenagers spend most of their day in shoes, while about 90% of their South African counterparts go barefoot.
|Aside from the obvious climate differences, it is tempting to think that South Africa’s lower economic ranking, compared with Germany’s, is the main reason for the absence of footwear. But this reasoning has been challenged by results from our recent survey.
We gathered information on the footwear habits of 714 boys attending a secondary school in a wealthy part of Auckland, New Zealand. Almost half of the students (45%) spent most of their time barefoot. Many of the students in this study were even willing to run distances of 100 to 3,000 metres on a hard track surface without shoes.
|Differences in foot structure between those who have never worn shoes and those who are usually in shoes have been described for over a century. In one seminal 1905 study, Phil Hoffman, warned how putting the fashionable desires of customers over the health of their feet had led to shoe design “that more or less crowds the front of the foot”.
The main developmental result of growing up in shoes appears to be a narrower foot and a lower arch. The result of this is more concentrated pressure at the heel and the ball of the foot during movement.
|Running as nature intended|
|We don’t know what effect growing up in shoes has on the development of movement skills, or the risk of injury in sport, but logic suggests that growing up barefoot is a good thing.
The heel of the foot is highly sensitive to pain, meaning that when people run barefoot they tend to avoid landing on their heel and instead defer the pressure to the mid and forefoot. This allows a broader surface area to absorb force.
In order to avoid a heel strike, the foot must never be too far in front of the body. As a result, barefoot runners tend to have a shorter stride. A shorter stride needs less leg extension, which is why barefoot runners have greater bend at the knee and a more pointed foot toward the floor. These joint positions allow muscles around the knee to help control landing and allow the ankle to behave in a more spring-like fashion.
|The problem with shoes|
|Covering the heel of the foot reduces the sensation it experiences when coming into contact with the ground. The running shoe, containing a cushioned heel, allows the runner to land on the heel of the foot with an extended leg. This is perhaps why about 75% of runners nowadays are heel strikers.
Running using an extended limb (overstriding) results in force being absorbed through the heel, bony structures and joints, with less assistance from muscle. This may be one of the reasons most running injuries are to structures that are not designed to absorb force (shins, feet and knees). Interestingly, when people remove their shoes, most revert to middle and forefoot striking.
Children and teenagers who grow up mostly barefoot appear strong enough to run quickly and for long distances without shoes. The prevalence of leg pain in the New Zealand students we studied was at the lower end of that reported globally in students of a similar age. This finding, combined with an absence of evidence for the role of shoes in the prevention of injury, makes it seem reasonable to suggest that children should spend as much time as possible barefoot.
Social acceptability is a barrier to barefoot activities in many Western countries, as a result, adults who did not grow up mostly barefoot may not have the same foot structure and leg strength to transition to barefoot activities quickly.
Gradually building time spent walking and running in bare feet is key for people who are new to barefoot activities. The increasing availability of shoes that mimic the structure of the foot (minimalist shoes) and have little cushioning other than to cover the foot, may help people transition to being barefoot. The improving design of these shoes may also help to tackle the issue of social acceptability.
Source The Conversation
|Leeds Beckett University provides funding as a member of The Conversation UK.|
|What we can learn about running from barefoot running: an evolutionary medical perspective, Lieberman DE. Exerc Sport Sci Rev. 2012 Apr;40(2):63-72. doi: 10.1097/JES.0b013e31824ab210.
Growing-up (habitually) barefoot influences the development of foot and arch morphology in children and adolescents, Hollander K, de Villiers JE, Sehner S, Wegscheider K, Braumann KM, Venter R, Zech A. Sci Rep. 2017 Aug 14;7(1):8079. doi: 10.1038/s41598-017-07868-4.
Flat feet, happy feet? Comparison of the dynamic plantar pressure distribution and static medial foot geometry between Malawian and Dutch adults, Stolwijk NM, Duysens J, Louwerens JW, van de Ven YH, Keijsers NL. PLoS One. 2013;8(2):e57209. doi: 10.1371/journal.pone.0057209. Epub 2013 Feb 28.
Being barefoot. Prevalence at home, in school and during sport: a cross-sectional survey of 714 New Zealand secondary school boys, Peter Francis, Grant Schofield, and Lisa Mackay. J Foot Ankle Res. 2018; 11: 42. Published online 2018 Jul 18. doi: 10.1186/s13047-018-0285-y
The influence of footwear on the prevalence of flat foot. A survey of 2300 children, Rao UB, Joseph B. J Bone Joint Surg Br. 1992 Jul;74(4):525-7.
The effects of habitual footwear use: foot shape and function in native barefoot walkers, K. D’AoÛt, T.C. Pataky, D. De Clercq & P. Aerts (2009) Footwear Science, 1:2, 81-94, DOI: 10.1080/19424280903386411
Protective sensation of the plantar aspect of the foot, Robbins S, Gouw GJ, McClaran J, Waked E. Foot Ankle. 1993 Jul-Aug;14(6):347-52.
A Comparison of Stride Length and Lower Extremity Kinematics during Barefoot and Shod Running in Well Trained Distance Runners, Francis P, Ledingham J, Clarke S, Collins DJ, Jakeman P. J Sports Sci Med. 2016 Aug 5;15(3):417-423. eCollection 2016 Sep.
Foot strike patterns of runners at the 15-km point during an elite-level half marathon, Hasegawa H, Yamauchi T, Kraemer WJ. J Strength Cond Res. 2007 Aug;21(3):888-93.
What are the main running-related musculoskeletal injuries? A Systematic Review, Lopes AD, Hespanhol Júnior LC, Yeung SS, Costa LO. Sports Med. 2012 Oct 1;42(10):891-905. doi: 10.2165/11631170-000000000-00000.
Superficial plantar cutaneous sensation does not trigger barefoot running adaptations, Thompson MA, Hoffman KM. Gait Posture. 2017 Sep;57:305-309. doi: 10.1016/j.gaitpost.2017.06.269. Epub 2017 Jun 27.
14 Physical Activity, Adolescence, and Health: An Epidemiological Perspective, Aaron DJ PhD, Laporte RL PhD. Exercise and Sport Sciences Reviews: January 1997 – Volume 25 – Issue 1 – ppg 391-406
Motor Skills of Children and Adolescents Are Influenced by Growing up Barefoot or Shod, Zech A, Venter R, de Villiers JE, Sehner S, Wegscheider K, Hollander K. Front Pediatr. 2018 Apr 25;6:115. doi: 10.3389/fped.2018.00115. eCollection 2018.
Barefoot Exercising May Improve Balancing, Jumping Skills in Children in Lower Extremity Review