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¿Puedes comer antes de nadar?
¿Puedes comer antes de nadar? Alfredo Leon 52 Views • 6 years ago

En 1908, "Scouting for Boys", la guía del Boy Scout, amonestó a los lectores jóvenes que se atrevieron a comer menos de 90 minutos antes de nadar: "Puede ahogarse, y será su propia culpa".

Ese viejo adagio ha mantenido a innumerables niños en la terraza de la piscina, observando tristemente cómo sus amigos chapotean. Pero según la ciencia, los nadadores no tienen nada de qué preocuparse.

"Es un cuento de viejas", dijo Peter Wernicki, cirujano ortopédico del Hospital Indian River de la Clínica Cleveland y miembro del Consejo Asesor Científico de la Cruz Roja. "Está absolutamente bien nadar en cualquier momento después de comer".

Según el mito, comer desvía la sangre hacia el estómago y lejos de los músculos, lo que produce calambres paralizantes. O tal vez desvía la sangre hacia los músculos y lejos del estómago ... lo que también produce calambres paralizantes. Lo que sea.

Wernicki le dijo a Live Science que hay granos de verdad en cada una de estas razones. El suministro inadecuado de sangre puede causar calambres musculares. Y resulta que cuando comemos, el cuerpo desvía sangre extra a nuestro estómago; Cuando hacemos ejercicio, nuestros músculos también obtienen sangre adicional. Pero el cambio en el suministro de sangre después de comer un sándwich no es lo suficientemente grave como para provocar una emergencia médica, dijo Wernicki.

En otras palabras, los calambres musculares debido al bajo suministro de sangre simplemente no ocurren en personas sanas, según la Clínica Mayo. En cambio, generalmente indica una afección médica subyacente, como la arteriosclerosis, una afección que ocurre cuando las paredes arteriales de una persona se estrechan y endurecen.

Hubo un tiempo en que científicos tomaban en serio este mito. En la década de 1960, múltiples estudios investigaron si comer antes de nadar afectaba el rendimiento de los atletas o provocaba algún tipo de náuseas. Sin embargo, un pequeño estudio descubrió que se trataba de bupkis. En 1968, científicos alimentaron a 24 nadadores con un abundante desayuno de cereales, tostadas, azúcar, mantequilla y leche entera, y luego les hicieron esperar durante períodos de tiempo variables antes de nadar. Ninguno de los atletas experimentó calambres o náuseas en absoluto; ni siquiera disminuyeron la velocidad, según el estudio.

Hoy existe un claro consenso de que comer antes de nadar no es remotamente peligroso.
Según Wernicki, nunca se ha registrado una instancia de una persona que se ahoga porque acaba de comer.

Dicho esto, ahogarse sigue siendo un peligro. Las personas tienden a ahogarse cuando aguantan la respiración durante demasiado tiempo bajo el agua, respiran demasiado profundamente antes de una inmersión o se cansan. No necesita preocuparse por cuándo come, pero tenga cuidado, dijo Wernicki.

"Asegúrese de saber nadar, asegúrese de conocer su entorno", dijo.

fuentes:
https://www.livescience.com

Perpetual Projections of Presuppositionalists
Perpetual Projections of Presuppositionalists Deen Doughouz 558 Views • 8 years ago

This is the long version of my argument with Dr. David Shormann, and it shows why he would be no good on a radio show. He was all over the place, constantly interrupting everything said, changing the subject to irrelevant topics, trying to gain superiority in whatever topic he could, and just being completely unreasonable and generally objectionable. He was so obnoxious in fact, that when I finally broke away from him, I turned to Eric Hovind and admitted that even he was neither as odious nor as dishonest as David Shormann.

Just to clarity:
(1a) A presuppositionalist is one who engages in or endorses Presuppositional apologetics. Opponants of presuppositionalism are NOT presuppositionalists.
(1b) According to Wikipedia, a 'presupposition' is an implicit assumption about the world or background belief relating to an utterance whose truth is taken for granted in discourse. Examples of presuppositions include:
Jane no longer writes fiction.
Presupposition: Jane once wrote fiction.
Have you stopped eating meat?
Presupposition: you had once eaten meat.
Have you talked to Hans?
Presupposition: Hans exists.

I have no such presuppositions.


One might argue how I must 'presuppose' that reality is real, but I do not. Reality is real by definition. Besides, the laws of reality would still apply to us even if our existence were an illusion, such as in a dream of Brahma, or a computer-enhanced hallucination like the Matrix. Thus reality must be accepted as real if we are to make sense out of anything.

Shormann uses presuppositions; I do not. That's why he would sooner question the reality of reality itself than doubt his deity.


(2a) Reason: The ability to reason, of being capable of reason, of being reasonable, and able to be reasoned with -are all juxtoposed against the blind closed-mindedness of faith-based assertions.
(2b) To be rational and to think rationally, to base one's postulations on sound logic and evidence rather than subjective impressions or emotional attachments.

Shormann has rejected reason as a necessary requirement of presuppositionalism; I do not deny reason; I am an advocate of reason. That's why I had VIP status at the Reason Rally.


(3) Magic: (a) the use of means (as charms or spells) believed to have supernatural power over natural forces. (b) magic rites [blessings] or incantations [speaking anything into existence] (c) an extraordinary power or influence seemingly from a supernatural source, such as witch, wizard, devil, or deity.

David Shormann obviously believes in magic where I clearly do not.


(4) The Nazis were mostly Christian and almost exclusively creationist. Absolutely all the arguments I have ever seen from any of theirs or their successor's propaganda stem from creationist assumptions and religious motivations rather than racial knowledge. Hitler even said so himself.

And finally, I started posting to Freethought Blogs because PZ invited me there, and I consider him a friend. I continue blogging there because a lot of people have strange opinions against that forum, and I find their woefully wrong generalizations personally amusing.

Sofort Umzug - Professionelle Umzugsfirma in Euskirchen North Rhine-Westphalia
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