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The phrase “chew the cud” means to further chew partly digested food — but many of us use it to mean something rather more abstract. The scientific word for this is rumination: A process of breaking big things into smaller parts that can then be dealt with or used. It’s apt that we use the same word for the human tendency to feast and dwell on our troubles.

While researchers are still working out exactly what rumination involves, it is generally used to mean excessive, repetitive thinking about personal problems. It often results in emotional distress and it is associated with many mental health issues — especially depression.

Positive rumination, meanwhile, involves focusing on positive states and thoughts. This can improve your health and wellbeing, explains Dane McCarrick, a postgraduate researcher at the University of Leeds who studies rumination.

“In general, we need to learn more about different types of rumination and how they respond to different treatment types,” McCarrick says. “There is no one size fits all approach.”

This article will focus on negative rumination — which can also hinder problem-solving and drive away needed social support — along with the tools researchers have identified as useful in mitigating it. Rumination can get us stuck in a rut. With help, you can get out.

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Rumination involves thinking too much about causes and consequences rather than solutions. Getty Images

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We all have one, and science suggests our blood type may make a difference when it comes to how healthy our hearts are. 

You wouldn’t know it by looking on the surface, but coursing through your veins every second of every day are tiny variations that categorize your blood into one of these groups: A+, A-, B+, B-, O-, O+, AB+, and AB-. Unless you’ve donated blood, were given a transfusion, or found out during pregnancy, maybe you’ve never thought twice about it.

Ongoing research into blood type suggests it may matter more than we give it credit for — at least when assessing risk for certain health conditions, especially heart disease. These invisible differences in the blood may give some people an edge at staving off cardiovascular problems and may leave others more susceptible.

What does blood type mean, and how are they different?

The letters A, B, and O represent various forms of the ABO gene, which program our blood cells differently to form the different blood groups. If you have type AB blood, for example, your body is programmed to produce A and B antigens on red blood cells. A person with type O blood doesn’t produce any antigens.  

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The foods we eat every day certainly play a role in our cognitive functioning. Ever sleep in past your alarm in college and be forced to sprint to take a grueling exam on an empty stomach? Not fun. But as we get older, the connection between nutrition and brain health becomes more pronounced in several ways. For starters, because the brain declines naturally with age, our risk of cognitive decline and disorders (such as dementia and Alzheimer’s) increases as we get older. This is why it’s vital to make sure your meals are incorporating brain-boosting nutrients: They’ll help keep you sharp both today and in the long term.

“Medical professionals and physicians are more than familiar with the general—and natural—cognitive decline that is associated with aging, as the brain does not make new cells as we age,” says neuroscientist Sonja K. Billes, PhD, the founder of August Scientific and a member of the Science Advisory Team at Solaray. “Our brain cells, known as neurons, may not communicate as well later in life, too,” she adds. To caveat, this decline is completely natural for many—but it still may cause weakened neurological activity and response, which affects cognitive functioning, memory retention, concentration, and focus, Dr. Billes says.

How nutrition and brain health are linked

While there isn’t too much we can do to stop the natural decline in brain health due to age (which is due, in part, to damage from free radicals and oxidative stress, which are byproducts that come with the aging process), we can take some amount of legitimate preventative action by adjusting our daily routines—such as getting more sleep and managing stress—and eating more brain-friendly foods on a consistent basis. These lifestyle changes have been shown to result in better cognitive functioning (as well as decreased inflammation, a happier state of existence, a healthier heart, and so on) as we age.

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Photo: Stocksy/Studio Firma

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Depending on the genes you were dealt, your body could be destined for a long, healthy future that stretches on for decades to come. 

Of course, your fate isn’t etched in stone. The diet you eat – and the way you eat it – could determine just how many of those prescribed days will be seen in good constitution.

Gerontologist Valter Longo from the University of Southern California in the US is convinced there’s an optimal formula to fasting and dieting that could give us the best chance of maximizing our individual lifespans.

To work out what that formula might look like, Longo and his colleague Rozalyn Anderson of the University of Wisconsin explored the literature on longevity and nutrition in a variety of living things, relating it all back to our own species.

“We explored the link between nutrients, fasting, genes, and longevity in short-lived species, and connected these links to clinical and epidemiological studies in primates and humans – including centenarians,” says Longo.

Of course, a single prescribed method of eating isn’t likely to ever become a one-size-fits-all approach. Just as variations in food habits introduce a litany of pros and cons for the health of other species, from simple microbes to worms to mammals like us, our own differences in genes and stages of development will determine the risks and benefits of different food items.

People older than 65, for example, might need to add a little more protein in their diet, just to ensure their bodies have plenty of material to bulk up dropping body mass and guard against growing frailty.

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Ever since I was a kid, I’ve had an obsession with fitness: it has always been the light that has kept me on the straight and narrow. I’ve had many dark moments in my life, from being depressed and addicted to various substances, to nearly taking my own life in 2020. I was also diagnosed with IBD (Inflammatory Bowel Disease) after I left the British Army, which resulted in medications that affected my bone health, and anti-inflammatory steroids with horrendous side effects including severe acne. At the time everything seemed pointless. This went on for many years until finally, I found a medication that keeps it under control and gave me my life back. I think experiencing these hardships has ultimately given me the greatest perspective on how short life is, and over the last two years in particular, I’ve been making some big changes in my personal fitness.

I’ve always been a “follow the science” kind of guy and looked at what is working for those who lead the industry. So for many years I had a push-pull-legs workout split and used to smash six days a week in the gym, however, I ultimately found that was too much from both a mental and physical recovery standpoint. I started doing full-body workouts instead and ended up loving it, since I hate dedicated leg days.

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Brandon Newman, 24, shares his weight loss and body transformation journey with Men’s Health.

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