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Watermelon Juice Prevents Aching Muscles
Chemical & Engineering News ^ | July 25, 2013 | Erika Gebel

Posted on 07/28/2013 9:59:38 AM PDT by neverdem

Food Chemistry: The amino acid L-citrulline found in the fruit could help athletes avoid muscle soreness after a hard workout

Before taking a long bike ride on a hot summer day, have some watermelon: The juicy fruit may ward off muscle pains. Researchers report that people who drank watermelon juice before exercising felt less sore the next day than those who drank a pink placebo beverage (J. Agric. Food Chem. 2013, DOI: 10.1021/jf400964r). They also found that cells absorb the presumed active ingredient, L-citrulline, more readily from unpasteurized watermelon juice than from plain water spiked with the compound, suggesting the natural source is the optimal delivery medium.

L-citrulline is an uncommon amino acid that, until recently, hasn’t gotten a lot of attention, says Encarna Aguayo of the Technical University of Cartagena in Spain. Scientists now recognize that L-citrulline has antioxidant properties and may enhance athletic performance, she says. For example, studies have shown that L-citrulline in supplement form accelerates removal of lactic acid from muscles, allowing for more intense training and faster recovery. Watermelon is one of the few natural foods with an abundance of L-citrulline, so Aguayo wanted to test whether the fruit’s juice could function as a sports drink.

First, the researchers purchased 10 seedless watermelons from a local market in Cartagena and juiced the fruit. They pasteurized some of the juice by heating it to 80 ˚C. The rest was left unpasteurized. Pasteurization kills harmful pathogens, but it also can “reduce the bioavailability of many bioactive compounds, reducing the food’s functional properties,” Aguayo says.

Aguayo and her team measured the concentration of L-citrulline in the watermelon juice with high-performance liquid chromatography and mass spectrometry and then adjusted the concentration to a standard 0.685 mM. They also spiked water with the amino acid at the same concentration. The researchers then added the solutions to cultures of human colon cancer cells. After eight minutes, the researchers measured how much L-citrulline remained outside the cells. They found that cells bathed in the unpasteurized watermelon juice had absorbed 19% of the L-citrulline, while absorption from pasteurized juice and spiked water never got above 13% and 12%, respectively. Better absorption should lead to a more potent benefit, Aguayo says.

For the next test, the researchers recruited seven men who regularly played sports but were not competitive athletes. Each participant drank half a liter of one of three beverages: watermelon juice with 1.17 g of L-citrulline, watermelon juice enriched to have 5 g of L-citrulline, or a pink, fruity drink without watermelon or L-citrulline. The participants then cycled for 11 minutes, alternating between periods of intense pedaling and rest. The next day, the men who had drunk either type of watermelon juice reported essentially no leg soreness, while those who had imbibed the placebo reported feeling sore.

The take-home message from this study, according to Thomas Swensen of Ithaca College, is that it’s better to drink unpasteurized watermelon juice than to take an L-citrulline supplement. Swensen says the next step would be to see if drinking the juice helps athletes perform better the next day because they are less sore. Aguayo plans to tweak the concentration of L-citrulline in watermelon juice to determine the optimal concentration for the prevention of muscle fatigue.


TOPICS: Health/Medicine; Military/Veterans; Science; Sports
KEYWORDS: citrulline; exercise; juice; lcitrulline; musclefatigue; muscles; soreness; watermelon; watermelonjuice
The results are provocative, but get a larger sample including couch potatoes, and get a better placebo of watermelon juice any without L-citrulline.
1 posted on 07/28/2013 9:59:38 AM PDT by neverdem
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To: neverdem

Add Skittles and watch the fun start...!


2 posted on 07/28/2013 10:00:42 AM PDT by freebilly (Creepy and the Ass Crackers....)
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To: neverdem

Okay I have the Arizona Watermelon Juice drink so what part do the Skittles® and Robitussin® play?


3 posted on 07/28/2013 10:01:34 AM PDT by BipolarBob
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To: neverdem
Must... Hold... Back...

The Racist Imagery this brings up is...
intriguing

Something about a Flexible Moral Center

4 posted on 07/28/2013 10:05:21 AM PDT by HangnJudge
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To: neverdem

Yeah,,, some Skittles and some Rob, and you’ll feel no pain, until you fall down, anyway!
“suggesting the natural source is the optimal delivery medium.”
That’s what they say about Pot too.


5 posted on 07/28/2013 10:05:49 AM PDT by Dr. Bogus Pachysandra ( Ya can't pick up a turd by the clean end!)
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To: neverdem

Ok? Where dies fried chicken and Colt 45 malt liquor fit into the regimen?


6 posted on 07/28/2013 10:07:36 AM PDT by ImJustAnotherOkie (zerogottago)
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To: neverdem

Yes, but can it help you read cursive?


7 posted on 07/28/2013 10:09:50 AM PDT by edpc (Wilby 2016)
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To: neverdem
Don't have to tell me twice.

Watermelon is arguably my all time favorite of food of any variety!

8 posted on 07/28/2013 10:11:29 AM PDT by KC_Lion (Build the America you want to live in at your address, and keep looking up.-Sarah Palin)
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To: neverdem

Bflr


9 posted on 07/28/2013 10:15:17 AM PDT by colinhester
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To: KC_Lion

I just put one in the fridge. I wonder if it would be good if I dunked watermelon chunks into vodka. Hmmm...


10 posted on 07/28/2013 10:15:23 AM PDT by Cowgirl of Justice
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To: Cowgirl of Justice

I’d bet it would! :)


11 posted on 07/28/2013 10:18:05 AM PDT by KC_Lion (Build the America you want to live in at your address, and keep looking up.-Sarah Palin)
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To: yefragetuwrabrumuy; SunkenCiv; Gondring; All

Get a better placebo of watermelon juice without any L-citrulline.

See comment# 1. Typing and eyesight are my real challenges, not syntax.

Hat tip yefragetuwrabrumuy!


12 posted on 07/28/2013 10:19:31 AM PDT by neverdem (Register pressure cookers! /s)
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To: neverdem

Good for the NBA players who have games every night.


13 posted on 07/28/2013 10:20:48 AM PDT by Old Yeller (Goodbye America. Glad the majority of my years were spent during the good days.)
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To: HangnJudge
The Racist Imagery this brings up is... intriguing

I'm probably completely over analyzing, but couldn't said imagery think to take pride in being a head of the curve on the benefits of watermelon, turning the stereotype in to a positive?

I'm not part of the "imagery group", but I liked watermelon before it became a possible therapeutic...

14 posted on 07/28/2013 10:21:50 AM PDT by Calvin Locke
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To: neverdem
...get a larger sample including couch potatoes,...

Also, do the study as a double-blind, crossover study. If the results indicate a real effect, then do a dose-response study.

15 posted on 07/28/2013 10:32:50 AM PDT by sima_yi ( Reporting live from the far North)
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To: neverdem
Thank goodness I started eating them at a young age.


16 posted on 07/28/2013 10:41:42 AM PDT by Errant
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To: neverdem

Screw this watermelon junk science noise. Pickle Juice is king.


17 posted on 07/28/2013 10:43:28 AM PDT by Autonomous User (Pain Fades. Chicks Dig Scars. Glory, lasts forever.)
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To: Autonomous User

“Pickle juice is king”.

Hmmm... did you use to play football? I have heard pickle juice from several coaches as a sure bet for cramping during a game. I also have used Tonic Water. It doesn’t taste great but will stop a muscle cramp.


18 posted on 07/28/2013 10:59:39 AM PDT by momtothree
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To: neverdem

So then if watermelon juice is so good for you then why did the media and scheme team and prosecution and Sanfore police go to such lengths to hide it under the guise of “Ice Tea”.


19 posted on 07/28/2013 10:59:48 AM PDT by Uncle Chip
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To: neverdem

So, Liberace was on to something, after all!


20 posted on 07/28/2013 11:03:18 AM PDT by Wally_Kalbacken
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To: neverdem

Watermelon is also the best hangover cure.

(lots of hydration)


21 posted on 07/28/2013 11:04:10 AM PDT by hattend (Firearms and ammunition...the only growing industries under the Obama regime.)
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To: Calvin Locke
couldn't said imagery think to take pride in being a head of the curve

MUCH Better!

22 posted on 07/28/2013 11:21:55 AM PDT by HangnJudge
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To: momtothree

back in the day....Football, Now Avid Cyclist. (You know one of those guys in spandex FR love to hate.:) )

http://well.blogs.nytimes.com/2010/06/09/phys-ed-can-pickle-juice-stop-muscle-cramps/?_r=0

Tonic waters main ingredient is Quinine. Which is an effective muscle relaxant and used to treat “restles leg syndrome” and night cramps.

I like the pickle juice because a side benefit is it seems to lower body temp within seconds of ingestion.


23 posted on 07/28/2013 11:37:11 AM PDT by Autonomous User (Pain Fades. Chicks Dig Scars. Glory, lasts forever.)
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To: neverdem

So, which star athlete would dare lend their endorsement to the new energy drink- Melonade?


24 posted on 07/28/2013 11:47:24 AM PDT by mikrofon (Or "Drank" to be more appropriate...)
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To: momtothree
Hmmm... did you use to play football? I have heard pickle juice from several coaches as a sure bet for cramping during a game.

It worked for the Eagles against the Cowboys a few years back at Texas Stadium when the temperature was over 100 degrees, the Eagles went on and whupped the Cowboys real good that day.

25 posted on 07/28/2013 11:49:24 AM PDT by dfwgator
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To: dfwgator

You are correct sir.!!!

http://www.thepostgame.com/blog/chompions/201112/meet-new-energy-drink-pickle-juice


26 posted on 07/28/2013 12:45:33 PM PDT by Autonomous User (Pain Fades. Chicks Dig Scars. Glory, lasts forever.)
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To: neverdem
But, but....watermelon juice is loaded with fructose, and that crap'll kill ya! It's pure poison, I tell ya, and the risks of consumin' it far outweigh any potential benefits from the L-citrulline.

You're slipping there, doc.

27 posted on 07/28/2013 1:01:57 PM PDT by Mase (Save me from the people who would save me from myself!)
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To: neverdem

If there are health benefits to watermelon, I am going to live to be 105. I eat massive amounts of the stuff. I just bought my eleventh watermelon for the season and have eaten nearly every single one of them completely as no one in the house really eats much of it. (and this season I was gone for a month in Sweden were I didn’t buy any because a watermelon there costs $10-15)


28 posted on 07/28/2013 1:05:48 PM PDT by riri (Plannedopolis-look it up. It's how the elites plan for US to live.)
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To: freebilly

You are terrible! LOL Post of the day.


29 posted on 07/28/2013 1:21:44 PM PDT by ottbmare (the OTTB mare)
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To: neverdem

We just put a seedless one through our champion juicer. Love watermelon juice. It is also a natural diuretic.


30 posted on 07/28/2013 4:57:30 PM PDT by MomwithHope (Buy and read The Liberty Amendments by Mark Levin!)
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To: Mase

I’m not aware of fructose from fruit or fruit juice being associated with any pathology. Fiber slows the absorption of fructose.

HFCS55 in soft drinks correlates rather well. It started being used in the early 1970s. Non-alcoholic fatty liver disease showed up about a decade later.


31 posted on 07/28/2013 5:39:40 PM PDT by neverdem (Register pressure cookers! /s)
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To: riri

My daughter loves them frozen. I take one, clean the outside thoroughly with dilute bleach, slice it into neat wedges and put those in ziploc bags in the freezer. She could probably eat her weight in frozen watermelon.


32 posted on 07/28/2013 5:44:03 PM PDT by Black Agnes
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To: neverdem
And I thought the evilness of fructose depended completely on dosage and context. I also thought the reviews and meta-analyses linked a high glycemic index diet to the same adverse effects as a diet high in low glycemic fructose....like obesity and diabetes.

It's interesting to note that NAFLD began showing up about the same time as the obesity epidemic.

I'm still waiting for you to sing the praises of HFCS 42, since it offers so much less fructose than the sucrose it replaces.

33 posted on 07/28/2013 8:00:28 PM PDT by Mase (Save me from the people who would save me from myself!)
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To: neverdem

Can you say ‘watermelon’ these days any more? Isn’t that rassiss?


34 posted on 07/28/2013 8:01:10 PM PDT by Revolting cat! (Bad things are wrong! Ice cream is delicious!)
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To: Black Agnes

I have never tried it frozen. Have to give it a whirl.


35 posted on 07/28/2013 9:28:06 PM PDT by riri (Plannedopolis-look it up. It's how the elites plan for US to live.)
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To: riri

She makes ‘do’ with the watermelon. I won’t let her have popsicles or other fake stuff. But it IS good. Especially on a really hot day when you’ve been outside working.


36 posted on 07/28/2013 9:31:58 PM PDT by Black Agnes
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To: Mase
I'm still waiting for you to sing the praises of HFCS 42, since it offers so much less fructose than the sucrose it replaces.

It has less fructose than sucrose, and that may be a good thing, but I never had a problem with it as long as folks don't pig out on carbs, especially sweet carbs because they are addictive. They had to change the composition of placebos once they understood that the old sugar pills caused the release of endorphins.

I believe there was a confluence of unfortunate events in the 1970s and 80s. Corporal punishment of kids became an unacceptable form of discipline. Video games started taking hold of kids attention. HFCS55 could really be as much as 65 % fructose. Those who made soft drinks wanted to keep their market share. Why not make it as sweet as possible?

Parents were reduced to rewarding good behavior with sweets and providing enjoyable entertainment and punishing bad behavior by denying their kids access to those desires. It didn't help that playing video games and watching TV are sedentary activities.

37 posted on 07/28/2013 10:00:13 PM PDT by neverdem (Register pressure cookers! /s)
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To: neverdem

Paid for by the National Watermelon Association. Eat more watermelon!


38 posted on 07/29/2013 5:52:43 AM PDT by 1010RD (First, Do No Harm)
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To: 1010RD

I could care less who funded it if the results are real and reproducible. Battalions of Amazons sans steroids could be for real!


39 posted on 07/29/2013 10:24:14 PM PDT by neverdem (Register pressure cookers! /s)
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