Jon Nicholson carves the bowl at Millennium Skate Park - October 2019

A wrist-guard is a device to protect the

wrist In human anatomy, the wrist is variously defined as (1) the Carpal bones, carpus or carpal bones, the complex of eight bones forming the proximal skeletal segment of the hand; "The wrist contains eight bones, roughly aligned in two rows, known ...

. Wrist-guards are sold in skateboard,

snowboard Snowboards are boards where the user places both feet, usually secured, to the same board. The board itself is wider than most skis, with the ability to glide on snow."snowboarding." Dictionary.com Unabridged (v 1.1). Random House, Inc. 17 Mar ...

and sporting goods stores. They are worn also by people using a

balance board A balance board is a device used as a circus skill, for recreation, balance training, athletic training, brain development, therapy, musical training and other kinds of personal development. It is a lever similar to a see-saw that the use ...

Purpose

The purpose of a wrist guard is to prevent the wearer from injuring their wrist or arm when falling. When a person falls forward, the typical

reflex In biology, a reflex, or reflex action, is an involuntary, unplanned sequence or action and nearly instantaneous response to a stimulus. Reflexes are found with varying levels of complexity in organisms with a nervous system. A reflex occurs ...

is to stretch their hands out in front of them to break the fall. In particularly violent or fast falls that are often associated with extreme sports, the forces associated with the fall can be large enough to cause severe bruising, dislocation or fracture of the wrist and arm bones. Wrist-guards prevent such injury with a plastic splint held on the inside of the wrist. The splint curves inwards towards the palm at the wrist joint, where it is exposed, and is concealed and held in place by padding at the hand and arm. When the wearer falls forward onto their hands, the curved plastic splint prevents the hand from hitting the ground, and the reduced friction of the plastic deflects the hands forward. Because of this reduced friction and forward deflection of the force of the fall, no weight can be put on the arm that is sufficient to cause any injury without the arm simply sliding forward. Although wrist guards can prevent arm injury, they have no effect on injuries to the shoulder, and dislocation or fracture is still possible, if not more likely due to the arm being thrown outwards.

Disadvantages

Because the force of the fall has to impact upon some part of the body, wrist guards increase the chance of facial or head injuries because the arms cannot support the upper body on impact. Additionally, if the fingers are held in a loose fist upon impact or are folded towards the palm they can catch on the ground during a fall, causing severe grazing to the knuckles. If the fall is particularly steep, because the wrist guard ends just below the base of the fingers, the first set of knuckles is at risk of injury by being bent back over the wrist-guard.

Purpose

Disadvantages

See also