Hysterical strength

Hysterical strength, also known as superhuman strength, is a display of extreme strength by humans, beyond what is believed to be normal, usually occurring when people are in life and death situations. Common anecdotal examples include parents lifting vehicles to rescue their children. Such examples, however, have not been proven and have been dismissed by doctors across the world. The extra strength is commonly attributed to increased adrenaline production, though supporting evidence is scarce, and inconclusive when available; research into the phenomenon is difficult, though it is thought that it is theoretically possible.^[1]

Superhuman strength may occur during excited delirium.^[2]^[3]

Examples[edit]

The most common anecdotal examples are of parents lifting vehicles to rescue their children, and when people are in life and death situations. Hysterical strength can result in torn muscles due to higher mechanical stress.

In 1982, in Lawrenceville, Georgia, Tony Cavallo was repairing a 1964 Chevrolet Impala automobile from underneath. The vehicle was propped up with jacks, but it fell. Cavallo's mother, Mrs. Angela Cavallo, lifted the car high enough and long enough for two neighbours to replace the jacks and pull Tony from beneath the car.^[4]
In 2006, Ivujivik, Quebec resident Lydia Angiyou saved several children by fighting a polar bear until a local hunter shot it.^[5]
In 2006, in Tucson, Arizona, Tom Boyle watched as a Chevrolet Camaro hit 18-year-old Kyle Holtrust. The car pinned Holtrust, still alive, underneath. Boyle lifted the Camaro off the teenager, while the driver of the car pulled the teen to safety.^[4]^[6]
In 2009, in Ottawa, Kansas, 1.70 m (5 ft 7 in), 84 kg (185 lb) Nick Harris lifted a Mercury sedan to help a 6-year-old girl pinned beneath.^[7]
In 2011, in Tampa, Florida, 1.91 m (6 ft 3 in), 134 kg (295 lb) University of South Florida college football player Danous Estenor lifted a 1,600 kg (3,500 lb) car off of a man who had been caught underneath. The man was a tow truck driver who had been pinned under the rear tire of a 1990 Cadillac Seville, which had lurched forward as he worked underneath it. The man suffered only minor injuries.^[8]
In 2012, in Glen Allen, Virginia, 22-year-old Lauren Kornacki rescued her father, Alec Kornacki, after the jack used to prop up his BMW slipped, pinning him under it. Lauren lifted the car, then performed CPR on her father and saved his life.^[9]
In 2013, in Oregon, teenage sisters Hanna (age 16) & Haylee (age 14) lifted a tractor to save their father pinned underneath.^[10]
In 2015, in St. John's, Newfoundland, Nick Williams lifted a four-wheel-drive vehicle to save a young boy pinned beneath its tire.^[11]
In 2015, in Vienna, Virginia, Charlotte Heffelmire was able to momentarily use incredible strength to free her father from a GMC pick-up truck.^[12]

Research[edit]

Early experiments showed that adrenaline increases twitch, but not tetanic force and rate of force development in muscles.^[13] It is questionable, however, as to whether adrenaline, released from the adrenal medulla into the venous circulation, can reach the muscle quickly enough in order to be able to cause such an effect in the midst of a crisis. It may be that noradrenaline released from sympathetic nerve terminals directly innervating skeletal muscle,^[14] has more of an effect over the timescale of seconds.

Amphetamine and other stimulants are used by some athletes for their psychological and performance-enhancing effects.^[15]^[16] In competitive sports, this form of use is prohibited by anti-doping regulations.^[15] In healthy people at oral therapeutic doses, amphetamine has been shown to increase physical strength,^[15]^[17]acceleration,^[15]^[17] stamina,^[15]^[18] and endurance,^[15]^[18] while reducing reaction time.^[15] Like methylphenidate and bupropion, amphetamine increases stamina and endurance in humans primarily through reuptake inhibition and release of dopamine in the central nervous system.^[17]^[18]

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Hysterical strength

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