Walking From Wikipedia, the free encyclopedia.
 |
| Computer simulation of a human walk cycle. In this model the head keeps the same level at all times, whereas the hip follows a sine curve. |
The word walk is descended from the Old English wealcan "to roll". In humans and other bipeds, walking is generally distinguished from running in that only one foot at a time leaves contact with the ground and there is a period of double-support. In contrast, running begins when both feet are off the ground with each step.
This distinction has the status of a formal requirement in competitive walking events. For quadrupedal species, there are numerous gaits which may be termed walking or running, and distinctions based upon the presence or absence of a suspended phase or the number of feet in contact any time do not yield mechanically correct classification. The most effective method to distinguish walking from running is to measure the height of a person's center of mass using motion capture or a force plate at midstance.
During walking, the center of mass reaches a maximum height at midstance while during running, it is at a minimum. Definitions based on the percent of the stride during which a foot is in contact with the ground (averaged across all feet) of greater than 50% contact corresponds well with identification of 'inverted pendulum' mechanics and are indicative of walking for animals with any number of limbs, although this definition is incomplete. Running humans and animals may have contact periods greater than 50% of a gait cycle when rounding corners, running uphill or carrying loads.
Although walking speeds can vary greatly depending on factors such as height, weight, age, terrain, surface, load, culture, effort, and fitness, the average human walking speed is about 5.0 kilometres per hour (km/h), or about 3.1 miles per hour (mph). Specific studies have found pedestrian walking speeds ranging from 4.51 kilometres per hour (2.80 mph) to 4.75 kilometres per hour (2.95 mph) for older individuals and from 5.32 kilometres per hour (3.31 mph) to 5.43 kilometres per hour (3.37 mph) for younger individuals; a brisk walking speed can be around 6.5 kilometres per hour (4.0 mph).
Champion racewalkers can average more than 14 kilometres per hour (8.7 mph) over a distance of 20 kilometres (12 mi). An average human child achieves independent walking ability around 11 months old.
A Pedestrian Is A Person Traveling On Foot.
Health Benefits of Walking
Sustained walking sessions for a minimum period of thirty to sixty minutes a day, five days a week, with the correct walking posture, reduce health risks and have various overall health benefits, such as reducing the chances of cancer, type 2 diabetes, heart disease, anxiety and depression. Life expectancy is also increased even for individuals suffering from obesity or high blood pressure. Walking also increases bone health, especially strengthening the hip bone, and lowering the more harmful low-density lipoprotein (LDL) cholesterol, and raises the more useful good high-density lipoprotein (HDL) cholesterol.Studies have found that walking may also help prevent dementia and Alzheimer's.
The CDC's fact sheet on the Relationship of Walking to Mortality Among U.S. Adults with Diabetes states that those with diabetes who walked for 2 or more hours a week lowered their mortality rate from all causes by 39%. "Walking lengthened the life of people with diabetes regardless of age, sex, race, body mass index, length of time since diagnosis, and presence of complications or functional limitations."
Paleoanthropology and Ambulation
Judging from footprints discovered on a former shore in Kenya, it is thought possible that ancestors of modern humans were walking in ways very similar to the present activity as many as 1.5 million years ago.Evolutionary Origin of Walking
It is theorized that "walking" among tetrapods originated underwater with air-breathing fish that could "walk" underwater, giving rise to the plethora of land-dwelling life that walk on four or two limbs. While terrestrial tetrapods are theorized to have a single origin, arthropods and their relatives are thought to have independently evolved walking several times, specifically in insects, myriapods, chelicerates, tardigrades, onychophorans, and crustaceans.Variants of Walking
Nordic Walkers
- Hand walking; an unusual form of locomotion, in which the walker moves primarily using their hands.
- Walking on crutches (with a variety of possible gaits);
- Walking with one or two walking stick(s) or trekking poles (reducing the load on one or both legs, or supplementing the body's normal balancing mechanisms by also pushing against the ground through at least one arm that holds a long object);
- Walking while holding on to a walker, a framework to aid with balance; and
- Scrambling, using the arms (and hands or some other extension to the arms) not just as a backup to normal balance, but, as when walking on talus, to achieve states of balance that would be impossible or unstable when supported solely by the legs.
- Nordic walking, walking with ski poles in both hands.
Biomechanics
Simple Walk-Cycle
Walking differs from a running gait in a number of ways. The most obvious is that during walking one leg always stays on the ground while the other is swinging. In running there is typically a ballistic phase where the runner is airborne with both feet in the air (for bipedals).
Another difference concerns the movement of the center of mass of the body. In walking the body "vaults" over the leg on the ground, raising the center of mass to its highest point as the leg passes the vertical, and dropping it to the lowest as the legs are spread apart. Essentially kinetic energy of forward motion is constantly being traded for a rise in potential energy. This is reversed in running where the center of mass is at its lowest as the leg is vertical. This is because the impact of landing from the ballistic phase is absorbed by bending the leg and consequently storing energy in muscles and tendons. In running there is a conversion between kinetic, potential, and elastic energy.
There is an absolute limit on an individual's speed of walking (without special techniques such as those employed in speed walking) due to the upwards acceleration of the center of mass during a stride - if it's greater than the acceleration due to gravity the person will become airborne as they vault over the leg on the ground. Typically however, animals switch to a run at a lower speed than this due to energy efficiencies.
As a Leisure Activity
Walking in Shilda
 |
Many people walk as a hobby, and in the post-industrial
age it is often enjoyed as one of the best forms of exercise.
|
Sometimes people prefer to walk indoors using a treadmill. In some countries walking as a hobby is known as hiking (the typical North American term), rambling (a somewhat dated British expression, but remaining in use because it is enshrined in the title of the important Ramblers), or tramping. Hiking is a subtype of walking, generally used to mean walking in nature areas on specially designated routes or trails, as opposed to in urban environments; however, hiking can also refer to any long-distance walk. More obscure terms for walking include "to go by Marrow-bone stage", "to take one's daily constitutional", "to ride Shanks' pony", "to ride Shanks' mare", or "to go by Walker's bus".
Among search and rescue responders, those responders who walk (rather than ride, drive, fly, climb, or sit in a communications trailer) often are known as "ground pounders".
The Walking the Way to Health Initiative is the largest volunteer led walking scheme in the United Kingdom. Volunteers are trained to lead free Health Walks from community venues such as libraries and GP surgeries. The scheme has trained over 35,000 volunteers and have over 500 schemes operating across the UK, with thousands of people walking every week.
Professionals working to increase the number of people walking more usually come from six sectors: health, transport, environment, schools, sport and recreation, and urban design. A new organization called Walk England launched a web site on 18 June 2008 to provide these professionals with evidence, advice and examples of success stories of how to encourage communities to walk more. The site has a social networking aspect to allow professionals and the public to ask questions, discuss, post news and events and communicate with others in their area about walking, as well as a "walk now" option to find out what walks are available in each region.
The world's largest-registration walking event is the International Four Days Marches Nijmegen. The annual Labor Day walk on Mackinac Bridge draws over sixty thousand participants. The Chesapeake Bay Bridge walk annually draws over fifty thousand participants. Walks are often organized as charity events with walkers seeking sponsors to raise money for a specific cause. Charity walks range in length from two mile (3 km) or five km walks to as far as fifty miles (eighty km). The MS Challenge Walk is an example of a fifty mile walk which raises money to fight multiple sclerosis. The Oxfam Trailwalker is a one hundred km event.
As Transportation
Walking is the most basic and common mode of transportation and is recommended for a healthy lifestyle, and has numerous environmental benefits. However people are walking less in the UK; a Department of Transport report found that between 1995/97 and 2005 the average number of walk trips per person fell by 16%, from 292 to 245 per year. Many professionals in local authorities and the NHS are employed to halt this decline by ensuring that the built environment allows people to walk and that there are walking opportunities available to them.When distances are too great to be convenient, walking can be combined with other modes of transportation, such as cycling, public transport, car sharing, carpooling, hitchhiking, or driving a car.
Walkability
There has been a recent focus among urban planners in some communities to create pedestrian-friendly areas and roads, allowing commuting, shopping and recreation to be done on foot. The concept of walkability has arisen as a measure of the degree to which an area is friendly to walking. Some communities are at least partially car-free, making them particularly supportive of walking and other modes of transportation. In the United States, the active living network is an example of a concerted effort to develop communities more friendly to walking and other physical activities.Walking is also considered to be a clear example of a sustainable mode of transport, especially suited for urban use and/or relatively shorter distances. Non-motorised transport modes such as walking, but also cycling, small-wheeled transport (skates, skateboards, push scooters and hand carts) or wheelchair travel are often key elements of successfully encouraging clean urban transport. A large variety of case studies and good practices (from European cities and some worldwide examples) that promote and stimulate walking as a means of transportation in cities can be found at Eltis, Europe's portal for local transport.
The development of specific rights of way with appropriate infrastructure can promote increased participation and enjoyment of walking. Examples of types of investment include pedestrian malls, and foreshoreways such as oceanways and riverwalks.
In Robotics
The first successful attempts at walking robots tended to have six legs. The number of legs was reduced as microprocessor technology advanced, and there are now a number of robots that can walk on two legs. One for example, is ASIMO. Although robots have taken great strides in advancement, they still don't walk nearly as well as human beings as they often need to keep their knees bent permanently in order to improve stability.In 2009, Japanese roboticist Tomotaka Takahashi developed a robot that can jump three inches off the ground. The robot, named Ropid, is capable of getting up, walking, running, and jumping.
See the article:
Walking From Wikipedia, the free encyclopedia.
An Introduction to Walking
Uploaded on Oct 10, 2011Walking is a low-impact exercise accessible to just about everybody. It's safe, simple, and doesn't cost anything.George Halvorson, Chairman & CEO of Kaiser Permanente, explains the numerous health benefits of a regular walking regime: reduced risk of coronary heart disease, stroke, diabetes, and other chronic diseases. Physical activity need not be strenuous for an individual to reap significant health benefits; just 30 minutes a day (or two 15 minute sessions) of brisk walking will do the trick.
Get more information at: http://www.everybodywalk.org
Standard YouTube License @ EveryBodyWalk's channel
Walking After a Stroke
Uploaded on Feb 7, 2011When Daniela had a stroke at the age of 18, walking again became a major step in her rehabilitation. Hear her inspirational story of recovery. Plus, therapists explain how important it is to get patients with brain injuries to take those crucial first steps, how the desire to walk again can be a great motivator, and how even the smallest steps can mean big improvements. Listen in as Daniela attempts to regain something most of us take for granted.
Get more information at: http://www.everybodywalk.org
Standard YouTube License @ EveryBodyWalk's channel
After a Stroke: Alison's Story
Uploaded on Feb 9, 2012Stroke is the leading cause of adult disability in the United States and Europe and is the No. 2 cause of death worldwide. Alison Bonds Shapiro suffered two debilitating and nearly-fatal strokes in her fifties. This video tells her story of recovery and how she reclaimed the ability to walk.
Get more information at: http://www.everybodywalk.org
Standard YouTube License @ EveryBodyWalk's channel
New Technology Improves Mobility of Stroke Survivors
Uploaded on Jul 21, 2009In this video, Karen Nolan, PhD, a research scientist from Kessler Foundation Research Center, demonstrates new devices available to improve walking in individuals whose mobility has been impaired by acquired brain injury. Dr. Nolan's studies show that by applying technological advances, braces can be enhanced to not only improve walking, but help individuals with such disabilities as stroke or traumatic brain injury be more active and independent in their community.
Standard YouTube License @ Kessler Foundation
Device Helps Stroke Victims Walk Golden Gate
Published on May 10, 2013A new wearable walking device is letting stroke victims regain their mobility. It's called Kickstart and three early adopters used it to walk across the Golden Gate Bridge on Thursday. (May 10)
Standard YouTube License @ AssociatedPress
Walk Across Kansas Hopes to Raise Awareness & Money for Stroke Research
Published on May 15, 2013Physical Therapist Sandra Billinger, Ph.D., whose research focuses on the benefits of exercise after strokes. (She walked 570 miles across the entire state of Kansas last month in support of research to study the impact of physical activity in the recovery of strokes and brain trauma).
Standard YouTube License @ KUHospital
Stroke Survivor Walks Her First 4K Walk
Published on Apr 9, 2013Sabine Becker, was born with no arms, due to the drug Thalidomide. She accomplishes all daily chores with her feet.
10 months ago she had a major stroke, which paralyzed her left side completely. Now she is fundraising for her first 4K walk. All benefits go to "canine companions for Independence", an organization training service dogs for people with disabilities at no cost to the recipient.
Standard YouTube License @ Sabine Becker
Dawn... Stroke Survivor - Walking Again
Uploaded on Nov 3, 2011Standard YouTube License @ Trevor Wicken
2012 Stroke Walk
Published on Oct 13, 2012SSTattler: This a sample - most cities have the same equivalent - Everybody Walk!
A collection of photographs from The American Stroke Foundation's 10th Annual Stroke Walk that was held at Theis Park in Kansas City, MO on Saturday, Sept. 8th, 2012. A big thanks to our sponsors, volunteers, and participants who helped make this such a successful event! We look forward to seeing all of you next year!
Standard YouTube License @ AmericanStroke1997
No comments:
Post a Comment