Handshake

A handshake is a globally widespread, brief greeting or parting tradition in which two people grasp one of each other's hands, and in most cases, it is accompanied by a brief up-and-down movement of the grasped hands. Customs surrounding handshakes are specific to cultures. Different cultures may be more or less likely to shake hands, or there may be different customs about how or when to shake hands.
The handshake may have originated in prehistory as a demonstration of peaceful intent, since it shows that the hand holds no weapon. Another possibility is that it originated as a symbolic gesture of mutual commitment to an oath or promise: two hands clasping each other represents the sealing of a bond. One of the earliest known depictions of a handshake is an ancient Assyrian relief of the 9th century BC depicting the Assyrian king Shalmaneser III clasping the hand of the Babylonian king Marduk-zakir-shumi I to seal an alliance.
Archaeological ruins and ancient texts show that handshaking was practiced in ancient Greece (where it was called dexiosis) as early as the 5th century BC. For example, a depiction of two soldiers joining hands can be found on part of a 5th-century BC funerary stele that is on display in Berlin's Pergamon Museum (stele SK1708) and on other funerary steles, such as one from the 4th century BC that depicts Thraseas and his wife Euandria shaking hands.
Depictions of handshakes also appear in Archaic Greek, Etruscan and Roman funerary and non-funerary art. Muslim scholars have written that the custom of handshaking was introduced to them by the people of Yemen.
There are various customs surrounding handshakes, both generally and specific to certain cultures:
The handshake is commonly done upon meeting, greeting, parting, offering congratulations, expressing gratitude, or as a public sign of completing a business or diplomatic agreement. In sports, it is also done as a sign of good sportsmanship. Its purpose is to convey trust, respect, balance, and equality. If it is done to form an agreement, the agreement is not official until the hands are parted.
Unless health issues or local customs dictate otherwise, a handshake is made usually with bare hands. It depends on the situation.
Handshakes are known to spread a number of microbial pathogens. Certain diseases such as scabies are known to spread most frequently through direct skin-to-skin contact. A medical study has found that fist bumps and high fives spread fewer germs than handshakes. During the 2009 H1N1 pandemic, the dean of medicine at the University of Calgary, Tom Feasby, suggested that fist bumps may be a "nice replacement of the handshake" in an effort to prevent transmission of the virus.
Following a 2010 study that showed that only about 40% of doctors and other health care providers complied with hand hygiene rules in hospitals, Mark Sklansky, a doctor at UCLA hospital, decided to test "a handshake-free zone" as a method for limiting the spread of germs and reducing the transmission of disease. UCLA did not ban the handshakes outright, but rather suggested other options such as fist bumping, smiling, bowing, waving, and non-contact Namaste gestures. Other sources suggest raised brows, wai bow, two claps, hand over heart, sign language wave, or the shaka sign.
During the COVID-19 pandemic, several countries and organisations adopted policies encouraging people to use alternative modes of greeting instead of a handshake. Suggested alternatives included the elbow bump, the fist bump, foot tapping or non-contact actions for social distancing purposes, such as fist-and-palm or namaste gesture. Footshaking was also suggested.
It has been discovered as a part of research at Israel's Weizmann Institute that human handshakes serve as a means of transferring social chemical signals between the shakers. It appears that there is a tendency to bring the shaken hands to the vicinity of the nose and smell them. They may serve an evolutionary need to learn about the person whose hand was shaken, replacing a more overt sniffing behavior, as is common among animals and in certain human cultures (such as Tuvalu, Greenland or rural Mongolia, where a quick sniff is part of the traditional greeting ritual).
In 1963, Lance Dowson shook 12,500 individuals' hands in 10+1⁄2 hours, in Wrexham, N. Wales. Atlantic City, New Jersey Mayor Joseph Lazarow was recognized by the Guinness Book of World Records for a July 1977 publicity stunt, in which the mayor shook more than 11,000 hands in a single day, breaking the record previously held by President Theodore Roosevelt, who had set the record with 8,510 handshakes at a White House reception on January 1, 1907.
On 27 May 2008, Kevin Whittaker and Cory Jens broke the Guinness World Record for the World's Longest Handshake (single hand) in San Francisco, California, by shaking hands for 9 hours and 30 minutes, besting the previous record of 9 hours and 19 minutes set in 2006. This record stood briefly until 16 August 2008 when Kirk Williamson and Richard McCulley were recognized by Guinness World Records for the longest time two people shook hands uninterruptedly for 10 hours at Aloha Stadium in Aiea, Hawaii. On 21 September 2009, Jack Tsonis and Lindsay Morrison then broke that record by shaking hands for 12 hours, 34 minutes and 56 seconds. Their record was broken less than a month later in Claremont, California, when John-Clark Levin and George Posner shook hands for 15 hours, 15 minutes, and 15 seconds. The next month, on 21 November, Matthew Rosen and Joe Ackerman surpassed this feat, with a new world record time of 15 hours, 30 minutes and 45 seconds.
At 8 p.m. EST on Friday 14 January 2011 a new attempt at the longest hand-shake commenced in New York City's Times Square and the existing record was broken by semi-professional world record-breaker Alastair Galpin.
On 29 January 2020, a new world record for the longest handshaking relay was set by approximately 1,817 people in Abu Dhabi, United Arab Emirates, at Umm Al Emarat Park in an event organized by the Abu Dhabi Police to celebrate the 1 year anniversary of the signing of the Document on Human Fraternity for World Peace and Living Together in the city.