Can Humans Really Have Superhuman Strength?

[thomasxc]

So can this guy, pretty impressive huh?

I've heard tales that under extraordinary conditions, usually life threatening some people have performed tasks that they would normally never be able to do, this is fairly well documented and probably can be explained through normal biological means, adrenaline boosts, etc. I've never seen anyone do anything superhuman though. Anyone got any stories of superhuman feats? I'd be more inclined to believe that some people can achieve this sort of adrenaline rush without outside stimulus and can use it to achieve quite extraordinary feats, such as in the Worlds Strongest Man.

i agree. the discovery channel had a miniseries called "the human body:pushing the limits"...and it explained this phenomenon well...

 

[WarPhalange]

That is why pro powerlifters tear muscles from the bone, herniate spinal discs, and generally see injury as a right of passage.

LOL WUT?

"HAY GUYZ I TORE MY LEG RIGHT OFF I'M SO STRONG! PRAISE ME!"

Yeah, I've never seen that happen, pal. Powerlifters that don't train safely never make it to the big leagues. A serious injury can set you back weeks, months, or even a year. Only an idiot would be proud of getting injured. It's not like they are fighting bears, where injuries are unavoidable. They are lifting stuff. The only time you get hurt is if you make a mistake (going too hard, not enough warm up, etc.) or some freak accident. It's NOT a badge of courage.

Especially since n00bs are the ones who walk around injured because they haven't a clue what they are doing.

 

[Juarez]

you haven't met yet
i have done a lot of things involving strenght ( sorry but my inlgish is not good)
i veen in many accidents ones involving me and the rest , involving other people that i don't know.
but some how i wind up there pulling people out
i don't kno if its pure coincidence or something else
i have talk whit spicologist, doctors, prists about it
its some pretty shilling ****, the thing that ocure to me
and i don't still get it
and its not adrenalline
i got pretty extraordinary stories.
the priest and the psicologist sed to me that i had a gift
but i don't really bealive in those things
but kno I am wondering about it

 

[seycyrus]

you haven't met yet

I am sure I speak for the rest of PF, when I ask that you please tell us about your exploits!

 

[Juarez]

I am sure I speak for the rest of PF, when I ask that you please tell us about your exploits!

the first time that it hapend to me was in a car accident , i was driving and i had my seatbelt on so i tooked of to reach (there were 2 friends whit me) the one in the copilot door because he wasent wearing seat belt.
i began to see the crash seconds before it hapend , i wanted to move the world ( stear to another way, break,etc) but it was inebitable to do such thing
i hold on to the door of the copilot so he would won't slash by the crash ( the car had hit mine in my side) i went trhu front windows car smashing mi forehead in the rearview mirror i had only few scars, i went to jail that day ( i was 17 years) they loked me up beacuse y was whit tow pasengers and automatically charges are pressed.
the thing is pulled out my other friend from the back seat he's is very tall he got a nose ingury but he is well , the friend that was in the copilot was unharmed beacuse i grabed his door
my older brother was furios because y didnt was the responsable of the crash, and when they brought the car to the house they took some pictures, and the door where i grab was bend , my brother dismantel ther car and he didnt notice that , but i did and i didnt tell anybody,allso didnt know that i took the seat of the car when i pulled my friend of the back (idnt riped out, but the screws where all bent)
in the crash my friend told me ( the one that didnt had an ingury) that he was seeing me so calm , that i wasent shaking or somthing like that.
i remember that day because its the start of the others things that began to hapen to me

 

[Juarez]

sorry about the ortografic horrors but i don't know much inglish and I am at work rigth now
so I am writing fast

 

[leutious2]

I'm on the verge of of making history andso my examples will finally lay all your doughts to rest. "Super human strength", will be a thing of the past!

 

[Evo]

I'm on the verge of of making history andso my examples will finally lay all your doughts to rest. "Super human strength", will be a thing of the past!

I suggest that you read our guidelines on "overly speculative posts" before you post something that is in violation of our guidelines.

Overly Speculative Posts:
One of the main goals of PF is to help students learn the current status of physics as practiced by the scientific community; accordingly, Physicsforums.com strives to maintain high standards of academic integrity. There are many open questions in physics, and we welcome discussion on those subjects provided the discussion remains intellectually sound. It is against our Posting Guidelines to discuss, in most of the PF forums, new or non-mainstream theories or ideas that have not been published in professional peer-reviewed journals or are not part of current professional mainstream scientific discussion. Posts deleted under this rule will be accompanied by a private message from a Staff member, and, if appropriate, an invitation to resubmit the post in accordance with our Independent Research Guidelines. Poorly formulated personal theories, unfounded challenges of mainstream science, and overt crackpottery will not be tolerated anywhere on the site. Linking to obviously "crank" or "crackpot" sites is prohibited.

https://www.physicsforums.com/showthread.php?t=5374

 

[streeters]

On the television show "Real TV", I watched a large man pic up a fallen helicopter with someone trapped inside it. Even as I saw it with my own eyes, it didn't look possible. Now mind you, it was just a small chopper (Bell 47G, if I remember correctly), and he didn't exactly lift it over his head, just rolled it enough for the trapped pilot to be pulled out. Still, this is looked like something that shouldn't be possible.

Added note; I know from my own experience that I can dunk a basketball in the heat of a game, but not when I'm practicing.

I actually saw that show ages ago! What you didn't mention was that the helicopter was submerged in water, so would have been much easier to move.

 

[mathwonk]

not all cars are that heavy. as a grad student in my 20's i could roll my VW bug up a small hill, by pushing with my back against it. I was then a meat lugger and routinely unloaded 40-80 thousand pounds of beef per day on my job. now i have trouble lifting a calculus book.

 

[Proton Soup]

LOL WUT?

"HAY GUYZ I TORE MY LEG RIGHT OFF I'M SO STRONG! PRAISE ME!"

Yeah, I've never seen that happen, pal. Powerlifters that don't train safely never make it to the big leagues. A serious injury can set you back weeks, months, or even a year. Only an idiot would be proud of getting injured. It's not like they are fighting bears, where injuries are unavoidable. They are lifting stuff. The only time you get hurt is if you make a mistake (going too hard, not enough warm up, etc.) or some freak accident. It's NOT a badge of courage.

Especially since n00bs are the ones who walk around injured because they haven't a clue what they are doing.

so, how much you bench, WP? it's not as if guys try to get injured, that would just set back their training. but it happens all the time. maybe it's just a small tear in a muscle that shows up as a bruise, but it's common. actually pulling a tendon off a bone happens less frequently, but still more often than you might think.

now, you may not be getting injured, but i suspect you haven't made much progress, either, noob.

 

[Proton Soup]

Bell 47G-5
Weight (empty): 749 kg (1,650 lbs.)
Max weight: 1294 kg (2,850 lbs.)
http://www.californiasciencecenter.org/Exhibits/AirAndSpace/AirAndAircraft/Bell47G5/Bell47G5.php

Hard to say...

with the right leverages, rolling that a bit should be easy.

 

[Pythagorean]

a chalk it off to a combination of adrenaline, higher pain threshold, and faulty witness observation. If you didn't feel pain, you could probably lift a lot more than you can now (up until you tear your muscles)

 

[Proton Soup]

a chalk it off to a combination of adrenaline, higher pain threshold, and faulty witness observation. If you didn't feel pain, you could probably lift a lot more than you can now (up until you tear your muscles)

pain is certainly inhibitory. the less pain you feel, the more you can lift. when it becomes a life or death situation, tho, the CNS will throw caution to the wind and output 100%.

 

[Ivan Seeking]

Off-topic discussion moved here.
https://www.physicsforums.com/showthread.php?t=275884

 

[Savant13]

I have seen discovery channel TV shows which support such claims. There is no reason that such acts violate the laws of physics.

 

[billyking]

on the topic of super human strengh
the body in commen situations protects itself as a saftey measure, stoping muscles from tearing by not using there full potentail, but in extreme circumstances this safe guard is removed

i witnessed this earlyer in 2008, when at rugby i was bundled by my entire team
this was a huge amount of weight with all of the team weighing at least 12 stone
due to this i could not breathe at all and i was starting to black out as i could not free myself dispite how hard i was pushing i was still being smoutherd

i was then able to push upwards enough to free myself and breathe but this resulted in my team mate reciving two broken ribs from the opposing forces eather side, this was also with the same amount of team mates on me with no change to the formation of the bundle

at almost the age of 17 with the height of 5 ft 5 weighing in at 15 stone mainly muscle

this required a huge amount of strengh , i also tore the muscle in my right bicep so badly i needed a sling :(

the human body can go to the extremes in dire survival situations

(im a biology geek by the way) :D

 

[Karl G.]

A little adrenaline can go a long way ...

 

[whatever man]

Do you think maybe, on the Idea of releasing adrenaline, that maybe a person could learn to release it without a stressful situation?

 

[tothfairysbac]

a few years ago i was playen pingpong with my friend he and i were both 8 and both weighing about 65 pounds at the time, after a bad hit the ping pong flew under a fridge in the room, and like it was nothing this friend of mine goes over and with one hand wedges the fridge against a wall and lifts it completely off the ground and with the other hand he just reaches under and snatches the ping pong while balancing the fridge, he then turned around and continued playen as if it was nothing, we latter found out the fridge tipped the scales at 283 pounds.

 

[tothfairysbac]

another time i was playen with my friend both of us in 6th grade, both of us never really mentioned the time when he eaisly picked up a 283 pound fridge with one hand to get a ping pong when he weighed 65 pounds, but this time we were both playen bball and he jumps up to block my shot (we were both 5'2 at the time) and when he jumps he goes high enough that his chin hits the ten foot rim while he was comeing back down, no trampoline no nothing, after that this kid does nothing more that can surprise me...yet

 

[BigFairy]

err.. i will be sceptical.

 

[arithmetix]

I read an account by Mark Twain, reporting on travels through Europe, of a man whose strength was something so far beyond the ordinary that I would be afraid to describe my recollections lest I be taken for a liar. I shall hint this much: that the man described by Clemens possessed the strength of a decent small crane.

 

[seycyrus]

I read an account by Mark Twain, reporting on travels through Europe, of a man whose strength was something so far beyond the ordinary that I would be afraid to describe my recollections lest I be taken for a liar. I shall hint this much: that the man described by Clemens possessed the strength of a decent small crane.

What did you think of the lead and the bullfrog story?

 

[Impagliazzo]

This makes a great deal of sense but I think there's more going on here, which is that the amount of strength we manifest is inextricable linked to how strong we believe we are.

In this video Derren Brown subtly hypnotizes a non-believer in crystal power into thinking his strength is being interfered with by crystal vibrations. (It is extremely interesting that he can do this despite the man's conscious, executive mental functions not accepting the notion.)

Speculating forward from this premise, I think a 120 lb grandma can lift a car off a baby because she doesn't have time to remember that she's not strong enough. All she knows is that it has to be done.

People who specifically practice the discipline of acquiring physical strength may, in fact, be most influenced by the belief that, having put in the work, they "deserve" to be stronger, and have their own permission to demonstrate greater strength.

Our tendency to sandbag our real muscle power may be due to a sense that our bones can only take so much. I saw a video of an arm wrestler who lost, not because he didn't have the muscle strength, but because his bone gave out: the other guy broke his arm.

So we basically underestimate the role of our brain/mind in every activity we do.

Something like how we scream because we touched the hot oven and a buddhist monk burned himself with gas while sitting on lotus position.

 

[rapidstart]

on the topic of super human strengh
the body in commen situations protects itself as a saftey measure, stoping muscles from tearing by not using there full potentail, but in extreme circumstances this safe guard is removed

i witnessed this earlyer in 2008, when at rugby i was bundled by my entire team
this was a huge amount of weight with all of the team weighing at least 12 stone
due to this i could not breathe at all and i was starting to black out as i could not free myself dispite how hard i was pushing i was still being smoutherd

i was then able to push upwards enough to free myself and breathe but this resulted in my team mate reciving two broken ribs from the opposing forces eather side, this was also with the same amount of team mates on me with no change to the formation of the bundle

at almost the age of 17 with the height of 5 ft 5 weighing in at 15 stone mainly muscle

this required a huge amount of strengh , i also tore the muscle in my right bicep so badly i needed a sling :(

the human body can go to the extremes in dire survival situations

(im a biology geek by the way) :D

A rugby player not long ago lost his life when when the whole thing collapsed on him displacing his spine.

 

[DanP]

Expression of human maximal strength is a function of several factors. Notably

A. Structural factors
- cross sectional area of contractile elements of the muscle fiber
- proportions of myosin heavy chains of type I, IIa, IIx in the muscle
- potentially, the activity level of several enzimes (although this is much more important in
displaying, maximal power in a specific bio-energetic regime then in max-strength display)

B. Neural factors

- level of activation of motor cortex, CNS drive to motoneurons, neural strategy choose for requirement (strategy used for motor control, to explain it in a easy to get way, it basically means that all other factors being the same, you can display more strength in a
movement which is "learned" very well.

- number of motor units recruited, rate coding, syncronization
- intramuscular coordination (linked to motor control strategies, probably the most determinant neural factor which affects expression of strength
- decreased antagonist muscles co-activation
- level of inhibition provided by Golgi tendon organs
- bilateral deficit / bilateral facilitation in bilateral work (as for example curling a barbel with both hands as opposed curling 1 dumbbell with 1 arm at a time

Now, given those factors and the fact that strength is produced by the contractile elements in the muscle we can logically think that

a) there is a maximum torque about a joint a muscle of a certain cross-sectional area and with a certain MHC composition can produce. Theoretically it is produced when all fibers
are recruited at the same time, in perfect synchronization, at maximal rate coding.

b) an untrained human will be only able to display a certain percentage of this maximal theoretical strength in most movements. Poor motor control, poor muscular synchronization,
very high levels of inhibition from GTOs, poor motivation (most ppl I know would not be very motivated to put even a modest weight on their shoulders and try to squat with it. They must "learn" they came.

In a a life and death situation some things may/will change. The level of activation of motor cortex may become much more close to the one of a trained athlete. Motivation to survive / save a life is much more powerful than dragging your *** to gym and deadlift something) The brain may decide to use a neural strategy which it would not use normally. GTOs may be inhibited, preventing them to act as a safeguard against too much tension in the muscle.

The result is that the subject of this unfortunate event can now express a much higher percentage of strength than before, in rapport to the maximum theoretical strength his muscles are structurally capable of. More often than not (when neural "safeguards" are off) , this will also result in serious injuries to the musculo-skeletal system. So it's kinda one way
all bets are one a single number now.

So to answer the question of the thread. Superhuman strength ? No. Expression of strength levels way over what the untrained person can display usually ? Yes (btw, if someone pretends he lifted a tank , ignore him. ) So much for unexplained and mysticism.

 

[tikay]

Most of us have probably heard the anecdotal accounts. One common story involves a mother who lifts a car which has fallen off the jackstands and trapped her son. In my own family there is a story about a great great aunt who, at about 120 Lbs or less and back in the 1940's I think, allegedly carried, shoved, or pulled her new and most highly prized refrigerator out of a burning house.

I have never seen any good evidence for such claims. Has anyone else?

I have not seen this in action, that I can recall offhand. But I met a woman once who had terrible scarring on her body from horrible burns, and a bit of scarring on her face and she told a tale, that she had been able to force a car off of her head which was trapped under the tire, when she was repairing something on a slight incline, and the car began to roll. The car I believe was a VW Beetle, and the scars across her mid-section resembled (or appeared to easily have been made by hot pipes), under a vehicle. So the story had a real flavor of authenticity.

She said she was alone, knew a bit about the car, had been lying nearly underneath working on something and when the front tire rolled onto her head it stopped there. She said it took a while but eventually she forced the car from sitting upon her head, and lunged away, setting herself free.

I have not thought of that, or her in years and years...but I think somehow it's possible.
People swim the English Channel (without being under duress), Complete in Triathelons with their sons wieght on their person, people do miraculous acts. They compete in excrutiathing weight lifting comps... & cut off limbs while trapped in rock faces, and crawl along trails to safety! We humans, we are very strong, it seems miraculous at times the feats we will pull off. I too have done some crazy things, in my time, requiring considerable stregnth, and stamina. So, yes, I believe that we can lift cars from our heads, and such in panic mode...
my friend was all the evidence I needed to make a believer of me. Good ol' adrenaline...it's like gasoline on a raging fire.

came back to edit~ when i am tired I lose parenthesis so easily!

 

[tikay]

Idk...as long as one of the parents has a Dominant Gene, which is brown/black eyes, then the child is MOST likely going to be Brown/Black. It is not 100% unless both parents are BB BB.

Do black eyes actually exist? i am 47 and have not once in my life seen a person with black eyes. (pupils yes, black iris' nadda one)

 

[tikay]

Do you think maybe, on the Idea of releasing adrenaline, that maybe a person could learn to release it without a stressful situation?

You merely make a contented bugger angry who, will in turn make you furious, and you will soon have some of the stuff at the ready...I believe that the stressors of childhood led (me) to an addiction to small doses of adrenaline, so within minutes, a happy person can become a fount for your adrenaline high...I am not proud but somewhat aware this may have happened in my life, on a rather subliminal level. là vous l'avez

 

[BigFairy]

Do you think maybe, on the Idea of releasing adrenaline, that maybe a person could learn to release it without a stressful situation?

Thats what amphetamines are for.

 

[Ivan Seeking]

Expression of human maximal strength is a function of several factors. Notably

A. Structural factors
- cross sectional area of contractile elements of the muscle fiber
- proportions of myosin heavy chains of type I, IIa, IIx in the muscle
- potentially, the activity level of several enzimes (although this is much more important in
displaying, maximal power in a specific bio-energetic regime then in max-strength display)

B. Neural factors

- level of activation of motor cortex, CNS drive to motoneurons, neural strategy choose for requirement (strategy used for motor control, to explain it in a easy to get way, it basically means that all other factors being the same, you can display more strength in a
movement which is "learned" very well.

- number of motor units recruited, rate coding, syncronization
- intramuscular coordination (linked to motor control strategies, probably the most determinant neural factor which affects expression of strength
- decreased antagonist muscles co-activation
- level of inhibition provided by Golgi tendon organs
- bilateral deficit / bilateral facilitation in bilateral work (as for example curling a barbel with both hands as opposed curling 1 dumbbell with 1 arm at a time

Now, given those factors and the fact that strength is produced by the contractile elements in the muscle we can logically think that

a) there is a maximum torque about a joint a muscle of a certain cross-sectional area and with a certain MHC composition can produce. Theoretically it is produced when all fibers
are recruited at the same time, in perfect synchronization, at maximal rate coding.

b) an untrained human will be only able to display a certain percentage of this maximal theoretical strength in most movements. Poor motor control, poor muscular synchronization,
very high levels of inhibition from GTOs, poor motivation (most ppl I know would not be very motivated to put even a modest weight on their shoulders and try to squat with it. They must "learn" they came.

In a a life and death situation some things may/will change. The level of activation of motor cortex may become much more close to the one of a trained athlete. Motivation to survive / save a life is much more powerful than dragging your *** to gym and deadlift something) The brain may decide to use a neural strategy which it would not use normally. GTOs may be inhibited, preventing them to act as a safeguard against too much tension in the muscle.

The result is that the subject of this unfortunate event can now express a much higher percentage of strength than before, in rapport to the maximum theoretical strength his muscles are structurally capable of. More often than not (when neural "safeguards" are off) , this will also result in serious injuries to the musculo-skeletal system. So it's kinda one way
all bets are one a single number now.

So to answer the question of the thread. Superhuman strength ? No. Expression of strength levels way over what the untrained person can display usually ? Yes (btw, if someone pretends he lifted a tank , ignore him. ) So much for unexplained and mysticism.

You have stated the mechanism for limits but nothing about those limits. Next, any argument that uses the word "may" is hardly a proof. Finally, who said anything about mysticism, besides you?

 

[DanP]

You have stated the mechanism for limits but nothing about those limits. Next, any argument that uses the word "may" is hardly a proof. Finally, who said anything about mysticism, besides you?

Take what what was written and learn from it. Think and make your own mind. If you have questions ask. See how it fits with your observations . If you seek proofs and theorems in human performance field I am afraid you are in a wrong direction for now.
This ain't math. Only mathematical theorems can be proved. What I can offer you is a potential mechanism for the phenomena.
Its up to you if you wish to pursue the ideea further, or discard it as rubbish.

Besides, limits where indirectly specified in:

****************************
there is a maximum torque about a joint a muscle of a certain cross-sectional area and with a certain MHC composition can produce. Theoretically it is produced when all fibers
are recruited at the same time, in perfect synchronization, at maximal rate coding.
****************************

If you are interested in numbers, what I suggest is to look after data regarding the tension developed by muscle fibers in rapport to the CSA during fused tetanus (there are papers published) then use this data to model various scenarios. You will get pretty fast some numbers for the simple case of a single joint system, enough to make an idea.

 

[tikay]

I was looking for this inspiring video~ the father who COMPLETES a Kona Triathelon while bringing son along...just pretty much shows that human stregnth and excellance are pretty astounding. Many of the worlds best athletes fail to make it across the finish line with any measure of grace. This father, doing this for love of his son, who asked him to do this,& began training despite a heart condition.

 

[BigFairy]

I was watching that and it is inspiring.

 

[tikay]

Yes to me, it is a fine example of two human energies, interested in prolonging and making greater, the life of the other.
That is most often...completely inspiring.

The strange twist (for me) is that the son, has probably advanced his fathers life by years, by asking for him to do something, that (may appear to be selfish on the surface) in turn made his father become a lot healthier, over time.

A nice case of "whos helping who" really, isn't it?

;~})

 

[BigFairy]

You have a way with words.

 

[the_awesome]

Haven't read all of it. But has anyone mentioned that humans only use about 10% of their strength? Adrenalin gives you the ability to go far beyond that.

 

[DanP]

Haven't read all of it. But has anyone mentioned that humans only use about 10% of their strength? Adrenalin gives you the ability to go far beyond that.

Yeah, right. Where is the support for this theory (myth) ?

 

[tikay]

Even that hypothesis about humans only using ten percent of our brain/mind has now been proven to be a mis-understanding, and not a truth.

(~ and Thanks BiG Fairy!)

 

[the_awesome]

Even that hypothesis about humans only using ten percent of our brain/mind has now been proven to be a mis-understanding, and not a truth.

(~ and Thanks BiG Fairy!)

So your saying that humans use 100% of their strength all the time? By following that logic, how can we then lift massive amounts using adrenalin, but we can't do it normally?

 

[BigFairy]

whats the massivest biggest hugest giantness thing that you have lifted using adrenalin? by your logic, if you weigh in at 75-80kg, you shoould lift at least three quarters of a tonne. lols... somehow i don't even think amphetamines would help you.

 

[Proton Soup]

whats the massivest biggest hugest giantness thing that you have lifted using adrenalin? by your logic, if you weigh in at 75-80kg, you shoould lift at least three quarters of a tonne. lols... somehow i don't even think amphetamines would help you.

you might be able to leg press that from a short distance to lockout. even pat robertson was pushing somewhere around a half ton.

but no, the usual sort of stimulants aren't going to do a lot. maybe 10% on a good day, which would be quite a lot actually. there's something beyond just a bit of adrenaline going on in superhuman type strength.

 

[the_awesome]

whats the massivest biggest hugest giantness thing that you have lifted using adrenalin? by your logic, if you weigh in at 75-80kg, you shoould lift at least three quarters of a tonne. lols... somehow i don't even think amphetamines would help you.

Haven't read all of it. But has anyone mentioned that humans only use about 10% of their strength? Adrenalin gives you the ability to go far beyond that.

Um..where did i relate it to weight?

 

[leroyjenkens]

how can we then lift massive amounts using adrenalin, but we can't do it normally?

Is there any proof that we can?

 

[the_awesome]

Is there any proof that we can?

Yes, I've done it before. Its a well known fact that when humans are under stress they can do amazing things :)

 

[Zubin]

When we use our body to exert some force we're not recruiting all the muscles in a particular muscle group due to safeguards. During tense situations someone may recruit a large amount of their muscles and thus perform feats they couldn't manage otherwise.

 

[leroyjenkens]

Yes, I've done it before. Its a well known fact that when humans are under stress they can do amazing things :)

So adrenaline can cause your muscles to contract harder than they can normally? I know it can take away pain. We've probably all experienced that, but I've never been able to exert more force from my muscles just because adrenaline starts pumping. Is there any documented evidence for this happening and an accompanying scientific explanation for the mechanism by which it works?
We've all heard the stories of the women who picked up a car to save her child, but how true are they? Adrenaline not only makes you able to lift extreme amounts of weight, but it also makes your ligaments, muscles and bones unbreakable?

When we use our body to exert some force we're not recruiting all the muscles in a particular muscle group due to safeguards.

Different movements use different muscle groups. If you do a certain movement, that movement utilizes all the muscles that assist that movement. If there were specified muscle groups reserved for hysterical strength, they would atrophy from lack of use well before you had a chance to use them.

 

[erok81]

So adrenaline can cause your muscles to contract harder than they can normally? I know it can take away pain. We've probably all experienced that, but I've never been able to exert more force from my muscles just because adrenaline starts pumping. Is there any documented evidence for this happening and an accompanying scientific explanation for the mechanism by which it works?
We've all heard the stories of the women who picked up a car to save her child, but how true are they? Adrenaline not only makes you able to lift extreme amounts of weight, but it also makes your ligaments, muscles and bones unbreakable?

Different movements use different muscle groups. If you do a certain movement, that movement utilizes all the muscles that assist that movement. If there were specified muscle groups reserved for hysterical strength, they would atrophy from lack of use well before you had a chance to use them.

I agree. I think a lot of these stories are just pure luck they do this. I've been around a lot of rollovers four wheeling. Depending on how the vehicle rolled, one person can easily flip it back it over, no adrenaline required.

Same thing goes for weight lifting. I've seen people get pinned under a bar, and be all alone. No matter how hard they try, they aren't going to lift that weight off their chest. Another example is weight lifting competitions. I can guarantee there is a lot of adrenaline involved when you are trying to lift as much as possible in front of a crowd. However those maxes don't just up by hundreds of pounds, like you would expect during an adrenaline packed super human feat of strength - sadly is isn't a whole lot more than lifted during practice.

 

[daveg360]

I agree with erok81 - a lot of the witness accounts fail to correctly observe the physics of a situation correctly. I child pinned by a car who is freed by a mother lifting the car quickly becomes "60Kg lady lifts 1600Kg to save child!" when in fact she didn't lift anything like that sort of weight. If the child was only trapped by the last couple of inchs of travel then most people can raise the body of a car on one side by that much.