Editing Plyometrics (section)

==Overview==
Plyometrics include explosive exercises to activate the quick response and elastic properties of the major muscles. It was initially adopted by [[Soviet Union at the Olympics|Soviet Olympians]] in the 1950s, and then by sportspeople worldwide.<ref>{{cite web |url=http://www.verkhoshansky.com/Portals/0/Presentations/Shock%20Method%20Plyometrics.pdf |title=Shock Method and Plyometrics: Updates And An In-Depth Examination}}</ref>  Sports using plyometrics include basketball, tennis, badminton, squash and volleyball as well as the various codes of football.<ref>{{Cite web|url=http://www.ultrafitnessmag.com.au/Train/Ground/tabid/4592/entryid/457/RUNNING-STRONG-INTRODUCING-PLYOMETRICS.aspx|title=RUNNING STRONG, INTRODUCING PLYOMETRICS|website=Fitness PRO Magazine|access-date=2016-05-18 |url-status=dead |archive-url=https://web.archive.org/web/20160604102325/http://www.ultrafitnessmag.com.au/Train/Ground/tabid/4592/entryid/457/RUNNING-STRONG-INTRODUCING-PLYOMETRICS.aspx |archive-date=2016-06-04}}</ref> The term "plyometrics" was coined by [[Fred Wilt]] after watching Soviet athletes prepare for their events in track and field.<ref name="Wilt">Wilt, Fred & Yessis, Michael. ''Soviet Theory, Technique and Training for Running and Hurdling.'' Vol 1. Championship Books, 1984.</ref>  He began a collaboration with trainer [[Michael Yessis]] to promote plyometrics.

Since its introduction in the early 1980s, two forms of plyometrics have evolved. In the original version, created by Russian scientist Yuri Verkhoshansky, it was defined as the shock method.<ref name="Verkhoshansky1966">{{cite journal|author= Yuri Verkhoshansky|title=Perspectives in the Improvement of Speed-Strength Preparation of Jumpers|journal=Legkaya Atletika(Track and Field)|volume=9|pages=11–12|year=1966}}</ref><ref name="Verkhoshanski2">{{cite journal|author= Yuri Verkhoshanski|title=Are Depth Jumps Useful?|journal= Legkaya Atletika (Track and Field)|volume=12|pages=9|year=1967}}</ref>  In this, the athlete would drop down from a height and experience a "shock" upon landing. This in turn would bring about a forced [[eccentric contraction]] which was then immediately switched to a [[concentric contraction]] as the athlete jumped upward. The landing and takeoff were executed in an extremely short period of time, in the range of 0.1–0.2 second.<ref name="Verkhoshanski2" /> Explosive plyometrics describes the approach originally created by Verkhoshansky.<ref name="Yessis" /> He experimented with many different exercises, but the depth jump appeared to be the best for duplicating the forces in the landing and takeoff.

The second version of plyometrics, seen to a greater extent in the [[United States]], involves any form of jump regardless of execution time.