We’ve all heard the rule that we should drink eight, 8-ounce glasses of water each day to stay properly hydrated and healthy. But where did this rule come from? What is the science and research behind the recommendation? Do you need to drink more water if you work out a lot? And what about the foods, like soup and grapefruit, that have a lot of water in them? Do they count towards your daily water-total?

A new commentary in the British Medical Journal, where a doctor called the recommendation to drink six to eight glasses of water a day, “thoroughly debunked nonsense,” is causing many to question what had been considered hydration-law. To clear this whole water-recommendation thing up, we talked with some experts about hydration to get the real deal on how much you really need to drink.

Do I Need to Drink Eight Glasses of Water a Day?

Basically, there is no one-size-fits-all approach when it comes to optimal hydration, says Dr. Josh Wagner, owner of The Life House on Manhattan’s Upper East Side, where he practices chiropractic and sports medicine.

“Eight cups of water per day is the classic recommendation for keeping hydrated, but how could, say, a 105-pound woman need to consume the same amount of water as a 240-pound man?” Dr. Wagner asks. “I usually advise my patients to drink at least half their body weight in ounces of water per day, and to add even more water if they tend to enjoy caffeinated beverages or alcohol or if they have other health concerns, such as diabetes. You’ve heard it before, but water makes up such a large percentage of our bodies and is one of the most important parts of a healthy lifestyle.”

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No pain, no gain, right? Well, maybe in certain scenarios, this old motto is false. A runner in training should expect fatigue. They should expect muscle soreness. They should also anticipate that not every run will be a good one. But what about when these truths start piling up? Does the runner need to learn to push through or is it possible that backing off will be the key to their success?

While it might not seem possible, a runner can actually over-train and negatively impact their performance.

Over-training is characterized as not allowing the body to rest and recover from the stress of training. If the body can’t catch up on the much needed repair time, the athlete’s performance will suffer. This is a very serious problem. Over-training has the potential to ruin one’s running career if not taken seriously. If the body gets into a state of over-training, it’s very difficult to recover.

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We are so proud of everyone who is taking on Courtney’s Summer Challenge! Two weeks down, ten to go, can you handle it? The answer is yes!

The week 3 challenge is just what we need for this heat wave. Courtney’s got three words for you: “Hydrate! Hydrate! Hydrate!” Watch the video now to get started:

A special shout to TRICIA, who wins the week 2 prize! She’ll receive a DIR T-shirt and some free guac from our sponsor, Wholly Guacamole.

With this week’s record breaking heat, which has been blamed for five deaths in Tennessee, Maryland and Wisconsin, some experts predict an unusually hot summer for the United States.

According to MSNBC.com,  a new study from Stanford University predicts that global climate change will lead permanently to unusually hot summers by the middle of the century. So, as the summers heat up, what can you do to stay cool and keep hydrated?

Lather Up: With excessive heat often comes excessive sunshine and no matter how much time you plan to spend outside, sun safety is critical for preventing skin cancer. Use sunscreen with an SPF30 or higher daily for protection and if you’re planning on spending the day outdoors, up the ante to an SPF45 or higher.

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Playing sports has a multitude of benefits for kids. Beyond the understood exercise, children learn time management, how to get along with other players, and most importantly, the necessity of teamwork. One of the most important, and least emphasized, skills that children will learn while playing sports is the necessity of proper nutrition and how it relates to both endurance and results.

Have you heard the saying, “You only get out of it what you put into it?” That saying seems tailor made for sports. As adults, we know the importance of fueling ourselves correctly, being certain to be adequately hydrated and well rested. These lessons are not usually at the forefront of a coach’s mind, however, and when you spend time ferrying your kids back and forth, it can often slip to the bottom of your priority list as well. After all, you’ve got to remember where the practice has been scheduled, remember to get the kids there on time AND the gear – something’s bound to slip your mind.

Arguably the most important aspect of the children/sports/nutrition triangle, and the one easiest to overlook, is hydration. Sure, we send our kids to practice and games with a water bottle – but do we make sure that they drink it all? And is the beverage that we’ve given them the best choice? How many of us have seen the swarm of players at the end of a game, grabbing a sugar sweetened drink pouch and thought to yourself, “Is that really the best beverage choice for a player who has just run for an hour?” Let’s take a look at hydration as it relates to the child or teen athlete.

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