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?WT.mc_id=2015-KWP-AUD_DEV&WT. Photo Phys Ed Gretchen Reynolds on the science of fitness.

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Exercise has had a Goldilocks problem, with experts debating just how much exercise is too little, too much or just the right amount to improve health and longevity. Two new, impressively large-scale, studies provide some clarity, suggesting that the ideal dose of exercise for a long life is a bit more than many of us currently believe we should get, but less than many of us might expect. The studies also found that prolonged or intense exercise is unlikely to be harmful and could add years to people’s lives. No one doubts, of course, that any amount of exercise is better than none. But unlike medicine, exercise does not come with dosing instructions. But whether that amount of exercise represents the least amount that someone should do — the minimum recommended dose — or the ideal amount has not been certain. Harvard researchers tested 23 online ‘symptom checkers.’ Most got failing grades. Here’s how they stack up. (Bigstock) Ever asked the Internet what your symptoms mean and gotten a response that seemed wacky or totally off base?

Harvard researchers tested 23 online ‘symptom checkers.’ Most got failing grades. Here’s how they stack up.

New peanut butter sniff test used to detect Alzheimer's. Think you may be in the early stages of Alzheimer's disease?

New peanut butter sniff test used to detect Alzheimer's

Crack open your cupboards and break into a jar of peanut butter. It's the test that researchers have found may help to indicate early stages of the disease. Researchers at the University of Florida used peanut butter in a recent study to determine patients’ loss of smell in one nostril compared to the other. Study Points to New Culprit in Heart Disease. Reasons to Have More Sex. Getting busy can improve your health.

Reasons to Have More Sex

Just another reason to slip between the sheets. High-Sugar Diet Can Impair Learning And Memory By Altering Gut Bacteria. The typical American diet is loaded with fat and sugar, and it may be hurting not only our physical health, but also our ability to think clearly.

High-Sugar Diet Can Impair Learning And Memory By Altering Gut Bacteria

New research from Oregon State University finds a high-sugar, high-fat diet causes changes in gut bacteria that seem to lead to significant losses in cognitive flexibility, a measurement of the brain's ability to switch between thinking about one concept to another, and to adapt to changes in the environment. The study, which was conducted on mice and published this week in the journal Neuroscience, found that a high-sugar diet was particularly detrimental to brain function, leading not only to decreased cognitive flexibility but also to impairments in short- and long-term memory.

“We’ve known for a while that too much fat and sugar are not good for you,” Dr. Kathy Magnusson, a biomedical scientist at the university and the study's lead author, said in a statement. As Magnusson suggests, the findings aren't entirely surprising. The Experiment. The world's most advanced Prosthetic Hand - bebionic.

Study: IUD use effective for pregnancy prevention. Women are more likely to choose to get IUDs and other highly effective contraceptives at family planning clinics if the clinicians there have been educated about these methods, according to a new study.

Study: IUD use effective for pregnancy prevention

The increase in the use of long-acting reversible contraceptives -- IUDs (intrauterine devices) and single-rod hormonal implants in the arm -- were associated with nearly 50percent fewer unintended pregnancies among the women in the study. Long-acting reversible contraceptives (LARCs) are considered the most effective method of contraception, associated with failure rates of less than 1 percent, whereas birth control pills and condoms have failure rates of 9 percent and 18 percent, respectively. One Phone Call Showed Me How People Dismiss Black Humanity When They Defend Police.

WASHINGTON -- Interviewing a source can be an eye-opening and harrowing experience, especially when speaking to someone who has been victimized -- or someone who feels her people have been wronged.

One Phone Call Showed Me How People Dismiss Black Humanity When They Defend Police

The Huffington Post published a story last week giving an account of the now-famous McKinney, Texas, pool party police debacle, based in part on an interview with one of the partygoers who had a gun pulled on him. But the real shock came when a resident who wasn't even at the party emailed me to say that I had it all wrong. ‘Freedom’ Fries: Texas Repeals Ban On Deep Fryers In Schools.

Follow CBSDFW.COM: Facebook | Twitter AUSTIN, Texas (AP) – It’s about freedom, not the fries.

‘Freedom’ Fries: Texas Repeals Ban On Deep Fryers In Schools

Eat me! This is your brain on sugar. In her new book, "Why Diets Fail," Columbia University neuroscientist and research psychologist Nicole Avena reveals that sugar is addictive; which may not come as a surprise to anyone who has suffered the unrelenting whine of a stubborn sweet tooth.

Eat me! This is your brain on sugar

In experiments with rats, she found that overeating foods like sugar can actually result in changes in the brain that resemble addiction. Avena explains how sugar gives us a hit of dopamine – one of the key ingredients in the brain’s reward system. Dopamine is the reason that alcohol, tobacco, and heroine can be so irresistible to many. Marriage?? Young Americans Aren't Even Shacking Up. You’ve probably heard that marriage among young adults has been on the decline, but a new Gallup poll finds that the percentage of 18-to-29-year-olds living with a partner has flatlined in recent years.

Marriage?? Young Americans Aren't Even Shacking Up

“This means that not only are fewer young adults married, but also that fewer are in committed relationships,” Gallup’s Lydia Saad wrote Monday. “As a result, the percentage of young adults who report being single and not living with someone has risen dramatically in the past decade.” Related: The Bad News About All the Singles in America That percentage has risen from 52 percent in 2004 to 64 percent last year, Gallup says. The data doesn’t necessarily mean young adults are avoiding relationships entirely. 50 hospitals charge uninsured more than 10 times cost of care, study finds.

Fifty hospitals in the United States are charging uninsured consumers more than 10 times the actual cost of patient care, according to research published Monday. All but one of the facilities are owned by for-profit entities and the largest number of hospitals — 20 — are in Florida. For the most part, researchers said, the hospitals with the highest markups are not in pricey neighborhoods or big cities, where the market might explain the higher prices. Topping the list is North Okaloosa Medical Center, a 110-bed facility in the Florida Panhandle about an hour outside of Pensacola.

Uninsured patients are charged 12.6 times the actual cost of patient care. Community Health Systems operates 25 of the hospitals on the list. 40 years of a changing American diet, in one massive chart. You don't eat the way your parents did. You can probably see that by just glancing at a cookbook from the 1960s or '70s. (So much Jell-O. So much canned food.) Infections Of The Mind: Why Anti-Vaxxers Just ‘Know’ They’re Right. Anti-vaccination beliefs can cause real, substantive harm, as shown by the recent outbreak of measles in the US.

These developments are as shocking and distressing as their consequences are predictable. But if the consequences are so predictable, why do the beliefs persist? 10 Surprising Benefits Of Earl Grey Tea You Never Knew. I love Earl Grey tea. I enjoy it so much that I even wrote an article on the history of Earl Grey for my blog. I discovered Earl Grey doesn’t just have a unique and tasty flavor (although not everyone would agree with that), it also has a wide range of benefits. 1. Good for Your Teeth. How much salary does a doctor make? - Business Insider. 30 Unhealthy Foods You Mistake As Healthy and Their Surprising Swaps - Early To Rise. Healthy Holistic Living: Let’s face it, the Standard American Diet (S.A.D.) is terrible. We’re led to believe that unhealthy foods are healthy simply because of the overuse of trendy “diet fads” and clever marketing.

You may already know some of these, while others may be new. I encourage you to give them a try and find the ones you like best. Sugar Vs. High Fructose Corn Syrup - What's the Difference? Let's go shopping on Healthcare.gov with Ted Cruz. Being Gay Not a Choice: Science Contradicts Ben Carson. Ben Carson, a retired neurosurgeon and presidential hopeful, recently apologized for a statement in which he said being gay is "absolutely" a choice. Procrsmed00338-0007.pdf. 5 Myths About Suicide, Debunked. By Stephanie Pappas, Senior Writer | March 27, 2014 12:55pm ET. A man invented vibrators because doctors were tired of giving orgasms. It was not uncommon for Victorian doctors to encounter female patients with hysteria.

Here's How Many Americans Have Contracted The Measles In The Disneyland Outbreak - BuzzFeed News. Smartphone Device Detects HIV, Syphilis. Posted: Thursday, February 5, 2015, 2:00 AM. Masturbation May Be Key to a Flatter Tummy. Vaccine Critics Turn Defensive Over Measles. Photo. Why French Kids Don't Have ADHD. Yale Scientific Magazine – Baby Got… Birth Control? The Impact of Hormonal Contraception on Attraction. Scientists tallied up all the advice on Dr. Oz's show. Half of it was baseless or wrong. The 8 most bogus health claims of 2014. 59 ways to live a longer life. For healthier hearts, focus on sugar, not salt, say researchers. Addiction to Cheese is Real Thanks to Casomorphins. Gut Bacteria and Probiotics. Study Points to Tool Against Obesity? How to Live Longer. No, Seriously, How Contagious Is Ebola? Infographic Shows The Differences Between The Diseases We Donate To, And The Diseases That Kill Us.

The mystery of the falling teen birth rate. Senses and Non-Sense: 7 Odd Hallucinations. 16 Reasons To Have Daily Sex. Measles cases in US soar to 20-year high as travelers infect unvaccinated locals. Lonely people post personal details on Facebook. Monitor for sunburn risk goes on sale. How often do you really need to shower? Black death was not spread by rat fleas, say researchers. News - 30,000-year-old giant virus 'comes back to life' 10 Vestigial Traits You Didn't Know You Had. Bionic hand allows amputee to feel again. Woman Dies, Nurse Refuses to Give CPR, Independent Living Community. Chill Out: Frozen Foods Are Just Fine. 8-Year Old Doesn't Age Due to Rare Condition. State of U.S. health 'mediocre': report. Regular sunscreen use slows skin aging, study shows.

Family Medical Costs Still Rising. Australian Man Dead for 40 Minutes Brought Back to Life By New Resuscitation Technique. HIGH-INTENSITY CIRCUIT TRAINING USING BODY WEIGHT: Maximum R... : ACSM's Health & Fitness Journal. UN urges people to eat insects to fight world hunger. Medicare Provider Charge Data. Cut salt, add potassium, live longer, researchers say. Bitter Pill: Why Medical Bills Are Killing Us. FDA Requires Lower Doses for Sleep Drugs. US teen invents advanced cancer test using Google. New technology can print 3D blood vessels in mere seconds.

m3rat2WcOE1qeqr1mo1_1280.png (643×1920) Testicles Of Yogurt-Eating Mice Shown Bigger, And Researchers Credit Probiotics. Chocolate Can Make You Thinner. Music training has biological impact on aging process. Susan G. Komen Pink Slips Planned Parenthood. Migration in America: The Great Human Capital Swap-Meet. Mystery skin disease Morgellons has no clear cause, CDC study says. Lifetime Medical Costs of Obesity: Prevention No Cure for Increasing Health Expenditure. High Fructose Corn Syrup By Any Other Name.

Controversial BPA found in canned kids' foods - Health - Children's health. Radiation Overdose at the Airport. Edmonton - Study finds no cancer link with kids, cellphones - CTV News. South Korean scientists create glowing dog - report. Study Finds Benefits in Health Insurance for the Poor. Food Freezing Technology Preserves Human Teeth. Organs Next? Ranking 37th — Measuring the Performance of the U.S. Health Care System. Ranking 37th — Measuring the Performance of the U.S. Health Care System. Cancer death rate gap widens based on education. Watching 'Jersey Shore' might make you dumber, study suggests. Why 'diet' food is so unsatisfying.

Study: New discovery on how infertility occurs - and why caffeine plays a role - National Health News. Research holds promise of harnessing life-extending benefits of spartan diet. Praise the lard? Study links church to obesity - Health - Diet and nutrition. England 'healthier than the US' A cure for the common cold may finally be achieved as a result of a remarkable discovery in a Cambridge laboratory - Science, News. Common weed petty spurge 'could treat' skin cancer. Life Expectancy Gains in U.S. Fail to Keep Pace With Peers. Vaccine study's author held related patent, medical journal reports. What the U.S. Can Learn from the Dutch About Teen Sex. Ecuadorean Villagers May Hold Secret to Longevity. Most Pesticide Laden Produce of 2010. Masturbation 'cuts cancer risk' Insurance commissioners to vote on medial loss ratio rule - Oct. 18, 2010.