historiascienciacionales:

¡Mueve esos brazos mientras corres!

Aquellos que lo han hecho con los brazos pegados al cuerpo podrán estar de acuerdo en que es complicado y cansado. Más aún si lo hacen con los brazos cruzados sobre el pecho, y ya no digamos con las manos tomadas por arriba de la cabeza.

Cuando movemos las piernas al correr, de manera casi instintiva, movemos los brazos. Al hacer esto con nuestras extremidades superiores, se logra un balance con nuestras piernas y pies. 

Aunque la física de la carrera se tiene clara, poco se entendía el costo energético de mover los brazos durante esta actividad.

Dos investigadores de universidades estadounidenses sugirieron que correr sin mover los brazos demanda más energía que correr con los brazos en movimiento. Para poner a prueba esta idea, le pidieron a un grupo de trece personas que corren de manera regular, que lo hicieran en el laboratorio en diferentes posturas.

Después de medir por siete minutos el consumo de oxígeno y la producción de dióxido de carbono de las personas mientras se movían sobre una banda para correr, los investigadores les pidieron que colocaran por unos minutos sus brazos junto a su cuerpo y las manos detrás de su espalda, luego que los cruzaran sobre su pecho, para finalizar tomando sus manos sobe la cabeza.  Cabe mencionar que al finalizar la sesión, los corredores se quejaron por los brazos cansados, sobre todo por la última posición.

Los investigadores compararon los resultados obtenidos de correr con los brazos en movimiento contra las otras tres posiciones. Los brazos junto al cuerpo y las manos detrás de la espalda aumenta un 3% el consumo de energía, 9% más si se cruzan en el pecho, y 13% más si se ponen sobre la cabeza.

Finalmente, analizaron el movimiento de los hombros de los corredores. Esto sirvió para concluir que el balanceo de nuestro torso y extremidades superiores cuando corremos es lo que define el consumo de energía. Es decir que mover los brazos reduce la energía, ayuda a minimizar el movimiento de la parte superior mientras se corre, y facilita alcanzar la estabilidad.

Este trabajo es un argumento de la importancia de mover los brazos cuando se corre. Ahora, sabemos que la fórmula para ser un corredor disciplinado involucra muchas más cosas que sólo moverse. Clive Staples Lewis, creador del mundo de Narnia, decía que si uno pudiera correr sin cansarse, entonces uno no querría hacer nada más. Así que ¡a calentar ese cuerpo para salir a correr!

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[Imagen tomada de este sitio]

Artículo original

Nota de The Journal of Experimental Biology



Jul 22   via      51

“Discrimination isn’t a thunderbolt, it isn’t an abrupt slap in the face. It’s the slow drumbeat of being underappreciated, feeling uncomfortable and encountering roadblocks along the path to success.”

Astrophysicist Meg Urry, quoted in "Girls Love Science. We Tell Them Not To." (via almost-a-class-act)



Jul 22   via      1060

twowhovianhearts:

askenjonine:

kierstiel:

221becquerel:

zchr:

what if you woke up with amnesia and all you could remember was your tumblr password and you had to discover who you were based off your posts

“wow I sure had a thing for boats”

#’wait am i a gay man’

image

this is the most perfect thing on tumblr omfg



Jul 21   via      442960


Jul 17   via   ©    15

postgraduatepurgatory:

Essential Productivity Apps for any student:

  1. Caffeine-  Prevents your screen from going into sleep mode. Great if you’re writing notes on an article and the screen keeps dimming, whilst you hope that if you stare long enough, the phrase “homologous ways to a view of hegemony” will start to make sense.
  2. Flux- If you find that you can’t sleep for ages after studying late at night, then this app is a total game changer. It basically turns the light on the screen red, because science people say that blue light keeps you awake and red light doesn’t. (*Full Disclosure* I’m not a scientist)
  3. Focusbar- The annoying voice of your mother nagging you to finish your homework…in app form. You can set the annoying level (I have it set on “wildly annoying”) and a bar will appear in the corner every few seconds to remind you that you’re supposed to be doing something else besides looking at cat photos. 
  4. Microsoft Office- self explanatory, so I’ve linked to an article about life hacks for Microsoft Office instead. Because I’m just that awesome. 
  5. Nag- Does your 5 minute study break keep turning into an hour on Youtube? Then you need Nag in your life. It’s basically an alarm/timer. But an extremely loud and annoying alarm/timer that’s very difficult to ignore. The bells genuinely sound more judgemental the longer you ignore it.  
  6. Self Control-  Also known as Cold Turkey for Microsoft users. If you absolutely cannot be trusted with an internet connection, then you need Self Control in your life. You add a list of websites to the “blacklist”and then set how long you want the app to work for, and for that duration of time you wont be able to access those website. Seriously, not even rebooting your computer or uninstalling the app will let you access the blacklist until your time is up. Tough love at its finest.
  7. Zotero-  The new love of my life. Zotero allows you to manage all your citations and sources in one easy place. It’s an absolute life saver- no joke. There’s an in-word add in, so it will write your bibliography and citations for you in any format you want. There’s a chrome/firefox add in and a mobile app, so you don’t even have to type the citation into Zotero. Just press the button it does all the hard work for you. It even updates itself online, so you can still access your bibliography if your computer crashes. I <3 Zotero 5eva. 


Jul 17   via   ©    68700

smashingxteacups:

doktorgirlfriend:

herooflife:

motherfickle:

thebrokenhunterandhisbrokenangel:

worldofdrakan:

its-heaven-nowadays:

More Macklemore, less Robin Thicke.

And yet a huge percentage of Tumblr hates him. Not trying to be confrontational, but could someone please explain to me why this is?

Because he is a straight white guy and Tumblr isn’t always right. 

Yup. A lot of people like to ignore all the good things he does simply because he is part of the privileged. Never mind that he flat out acknowledges this in Same Love. (“I may not be the same, but that’s not important.”)

BLESS YOUR SOULS. 

BLESS YOUR FUCKING SOULS. 

I ABSOLUTELY CANNOT STAND THAT FUCKING A LOT OF TUMBLR HATES MACKLEMORE. 

BECAUSE HONESTLY, HE WAS EVERYTHING THEY WERE COMPLAINING WHITE PEOPLE AREN’T AND NOW THAT THEY GOT A FUCKING ROLEMODEL THEY SUDDENLY COMPLAIN?????? BECAUSE HE’S WHITE????? 

Macklemore grew up privileged, yes, but he understands the inequality and the disturbing gap between rich and poor. He has a song called White Privilege: 

"Hiphop started off in a block that I’ve never been to
To counter act a struggle that I’ve never even been through
If I think I understand just because I flow too
That means I’m not keeping it true, nope.”

ALSO

"But as I’m blessed with the privilege, they’re still left with the scars"

AND HAVE YOU HEARD HIS SONG CLAIMING THE CITY???

"I grew up on Capitol Hill,
With two parents and two cars.
They had a beautiful marriage, we even had a swing set in our yard.
My mom didn’t have a job, because my dad made enough money that we could live comfortably and he could support us.
Now, he commute to Tacoma, so we knew we be good.
But then I realized everybody looked just like me in my neighborhood.
I go to school, which was diverse.
But indeed us, I got sandwiches and Capri Suns well my friends ate their free lunch.
It’s crazy trying to look back, cause when I was growing up
I didn’t understand the fact was there’s something called a social status.
And my black friends wanted my financial bracket.
And then my city’s divided,
From neighborhood to neighborhood
We’re polarized but we claim we’re progressive.
The police shoot in the hood but never once in my residence.
As a white person been shot at we’d stopped in a Lexus.
And to think that we have claimed that so much has changed”


OH GOODNESS ME, HE’S SUCH AN ASSHOLE. HE’S SO PRIVILEGED GOD.

HOW ABOUT A WAKE??? 

"Don’t wanna be that white dude, million man marchin’
Fighting for our freedom that my people stole
Don’t wanna make all my white fans uncomfortable
But you don’t even have a fuckin’ song for radio
Why you out here talkin race, tryin’ to save the fuckin’ globe
Don’t get involved with the causes in mind
White privilege, white guilt, at the same damn time
So we just party like it’s nineteen ninety nine
Celebrate the ignorance while these kids keep dying.”

Tumblr needs to hop down off it’s high fucking horse and instead of turning against a potential role model and ally to all that they’ve been fucking preaching about JUST BECAUSE HE’S PRIVILEGED AND WHITE, maybe make him an icon because he’s not rapping about disrespecting women. He’s making a small change. But because he grew up with a well structured family environment and he was able to afford everything he desired, he’s suddenly the enemy. 

Macklemore hate is proof that Tumblr’s brand of militant social justice is just made up of a bunch of people with either a victimization fetish and/or a hateful, angry heart seeking acceptable targets, and they then proceed to poison the people that really just want to do good, ultimately mangling a good cause beyond recognition.

And 99% of people who complain about the first lyric of “Same Love” have never actually listened beyond that. Somebody tells them “The song starts with ‘when i was in the third grade i thought that i was gay’” and they start clutching their pearls because surely the whole song is just some straight dude making lgbtqa rights all about him and how he thinks because he thought he was gay when he was eight he knows all about it. And maybe it’s not the best way to word the beginning of the song, BUT IF YOU ACTUALLY LISTEN OR READ BEYOND THAT it turns out it’s a segue into talking about ridiculous stereotypes and preconceived ideas about sexuality and questioning why someone would think it was a bad idea to be gay in the first place. And then it goes on to discuss the homophobia inherent in the music genre he’s a part of and calling his peers out on slurs and derogatory language and hypocrisy in religion, and it beautifully features Mary fucking Lambert, and goddammit I had trouble driving home when I first heard it in the car because I was fucking crying.

Macklemore is a privileged individual who consistently and vocally acknowledges his privileges and strives to use it to do legitimate good, which is everything Tumblr claims it wants, but as soon as he starts, they scream for him to shut up. Because their need to rage and scream and hate and wallow in willful ignorance is more important to them than seeing actual change take place anywhere in the world.

so glad i came across this post. you have to remember that tumblr :so called “activists” like to comment on anything that seems potentially bad, even if that means over-shadowing great points and progress that a lot of people, both gay and straight have wished for.



Jul 17   via   ©    591804

growlithed:

i wish my parents got me into a sport when i was young and kept me committed to it so id have a nice body but instead i ended up on the internet and im gross



Jul 17   via   ©    393389

urbancatfitters:

“shit it’s 2 a.m.” i say every day at 2 a.m. as if i am surprised



Jul 17   via   ©    405690


Jul 17   via   ©    11188

majesticaljeff:

rednecktex:

huffy-lemon:

Favorite story posts part 1

That last one

My dad says the ‘making love in a canoe’ about american beer



Jul 17   via   ©    213817
LG