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Our 5-minute wellness digest helps over 1.1 million readers cut through the noise with science-backed health insights, practical tips, and recommendations for living well.

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Getting Fit Before Surgery Could Mean Fewer Complications After

Exercise Is Medicine: Exercise offers countless perks, and most of us exercise to feel good and, of course, to look good. But new research points to yet another benefit beyond general health and fitness: how well your body handles surgery. This finding is important, since about two in three will need a major operation someday. Getting fit before surgery even has a name now: prehabilitation, or prehab. The Study: Researchers pooled 42 studies of 4,825 adults who did aerobic exercise before major surgery. Patients in 30 studies trained under supervision at a hospital or exercise facility, and those in the other 12 mostly worked out at home without medical supervision. Supervised exercise was linked to about 40% lower odds of complications after surgery. When supervised exercise included high-intensity workouts, the association strengthened.  The Takeaway: Exercising before surgery may help your body cope, especially when a pro is guiding your workouts, perhaps even more so if you do intense supervised exercise.  Keep in Mind: No study compared supervised and home workouts directly, and supervised programs were usually more intense, so supervision itself may not be the secret ingredient. Either way, it appears that a fitter body handles surgery better.

Woman performing a glute bridge on a mat at home, one of six core exercises for back pain that support the spine

Core Exercises That Help Protect Your Back

Crunches aren't enough to protect your spine. Learn the difference between your core and your abs, and discover six core stabilization exercises, including the curl-up, side plank, bird dog, dead bug, glute bridge, and prone plank, that build endurance, control, and stability to lower your risk of back injury.

Why Runners Are Drinking — and Spitting Out — Their Carbs

The Trend: Fall marathon season has begun, with a few of the biggest in the country happening in October and November. Rather than sucking down a gel, you might see marathoners and other athletes skipping actual food and drinking — and spitting out — a liquid carb solution instead.  What People Are Saying: Usually toward the end of a game or long race, athletes take a swig, swish it around like mouthwash, then spit it out. This is called carb rinsing, and by activating the brain through nerves in the mouth, it “tricks” the body into feeling like it has more energy. Carb rinsing can be done with an energy drink or a solution containing carbohydrates like maltodextrin, an easily digestible carb made from starch. Some rinses also contain caffeine or menthol. What to Know: Studies have found that carb rinsing can provide a small, quick performance boost, particularly during longer or more intense exercise. A carb rinse is probably not necessary if you’re on a short morning jog, but it’s generally safe to try during a race if you feel like you need an energy boost — just make sure you don’t accidentally spit on your competition when you’re doing […]

Close-up of sweat droplets on a woman's shoulder and collarbone after a workout, showing what your sweat can tell you about your health.

What Your Sweat Can Tell You About Your Health

Your sweat does more than cool you down. How much you sweat, how it smells, and how salty it is can offer clues about your hydration, stress, hormones, and overall health. Here's what to watch for and when to check in with a doctor.

“Functional” Drinks Promise More Than Just Hydration

The Trend: Years ago, a wellness drink meant a shot of wheatgrass in a funky juice bar. Now, “functional” shots are one of the biggest beverage trends around — and it’s a market that’s expected to grow from $6.6 billion in 2026 to $19 billion by 2033. Functional beverages promise benefits beyond basic nutrition, from helping you focus to boosting your mood. And these shot versions are marketed as convenient, single-dose alternatives pills or powders. What People Are Saying: Functional drinks have become more popular as more people look for alternatives to alcohol, soda, and energy drinks. Many contain adaptogenic and nootropic ingredients including L-theanine, ashwagandha, and lion’s mane, which are marketed for benefits including focus and relaxation. Others contain vitamins, minerals, CBD, probiotics, and more to improve sleep, energy, immunity — you name it. What to Know: Even though they’re marketed as being healthy, functional drinks might not be right for everyone. Like supplements, some functional drinks contain ingredients that aren’t closely regulated. Herbal ingredients can interfere with medications, and excessive amounts of certain vitamins and minerals can cause side effects.

Fermented Foods Keep Working Even After the Bacteria Stops

Gut Feeling: Kimchi and yogurt are known as gut-friendly foods because they contain probiotics. But a new review from Saudi Arabia suggests those live cultures may be getting too much credit, and that the compounds the bacteria leave behind are what’s really beneficial. The Study: In this narrative review published in Frontiers in Nutrition, a researcher examined more than two decades of studies on fermented foods and metabolic health. As microbes ferment food, they break it down into new substances called postbiotics (short-chain fatty acids that help strengthen the gut lining). These compounds stay biologically active even after the microbes that made them have died. The Takeaway: This means foods like pasteurized sauerkraut can still do you some good. And eating a variety of fermented foods across categories (think everything from kefir to miso) gives you a wider range of these compounds. Pairing them with fiber-rich plants will get you bonus points, since your gut bacteria feed off the roughage. Keep in Mind: Some of the most dramatic results come from animal studies, which don’t always hold up in people. How much you benefit may also depend on the bacteria already in your gut.

Salmon fillets, fresh greens, and vegetables on a kitchen table, the best food for blood pressure.

The Best Food for Blood Pressure, According to Cardiologists

No single food will lower your blood pressure on its own, but some make great additions to a DASH-style eating pattern. Here's what the research says about salmon, beets, leafy greens, potassium, and sodium.

sweating person in a cap drinking water, showing signs and symptoms of dehydration

Signs and Symptoms of Dehydration, From Mild to Severe

Thirst isn't always the first warning sign. Learn the signs and symptoms of dehydration, from dark urine and headaches to confusion and fainting, plus how to rehydrate and when to get medical help.

Can’t Turn Off Your Brain? Try This Sleep Trick

Wind Down: You finally crawl into bed at the end of the night, but of course your brain decides it’s the perfect moment to replay every awkward thing you said over the past week. Fortunately, yoga nidra is gaining traction as a sleep aid for insomnia. In a new study from India, people who practiced this specific type of guided body scan fell asleep faster and slept longer. How to Do It: Also called “yogic sleep,” yoga nidra is a guided meditation you do lying on your back while a voice slowly turns your attention to different parts of your body as you follow your breath. All you have to do is search for something like “yoga nidra for sleep” on YouTube and follow along. Selecting a 10-minute recording is a good place to start, and falling asleep partway through is totally fine. The Benefits: Compared with a group that got standard sleep hygiene advice, the yoga nidra group in the study slept roughly an hour longer each night and spent less time lying awake after dozing off. Everyone in the study had heart disease, but an earlier study of people with chronic insomnia found that yoga nidra helped them […]

If You Think You Sleep Fine After Coffee, Think Again

Afternoon Coffee: When it comes to coffee and bedtime, falling asleep isn’t the whole story. You might drift off easily after an afternoon coffee, sleep for your usual eight hours and never remember waking up — yet caffeine can still alter what happens inside your sleeping brain. That’s because sleep quality isn’t measured only by how long you’re unconscious. The Study: A 2026 systematic review in Nutrients examined 32 human studies using EEG to track the brain’s electrical activity during sleep. The researchers found that caffeine consistently suppressed low-frequency brain activity associated with deep, restorative NREM sleep. It also tended to increase faster-frequency activity, shifting the sleeping brain toward a lighter, more wake-like state. Importantly, these changes could show up even when traditional measures — like total sleep time or how quickly someone fell asleep — looked relatively normal. Takeaway: Even if you fall asleep “just fine” after an evening cup of Joe, your sleep might still be compromised. Keep in Mind: This was a review of varied studies, not a single controlled trial, and caffeine’s effects differ substantially between people. For some people, even morning caffeine may influence nighttime sleep; others may notice little effect.

Person sleeping under a patterned blanket in bed.

Can You Sleep Too Much? New Research Suggests There’s a Sweet Spot

More sleep isn’t always better. A Nature study found a U-shaped link between sleep and biological aging, with the lowest aging markers between about 6.4 and 7.8 hours.

How to Block Nighttime Light for Better Sleep and Heart Health

Lights Out: Plenty of us drift off at night with a streetlight glowing through the blinds or a phone lighting up the nightstand. But new research suggests even all-too-common dim light while sleeping could be bad for your heart. In a study of more than 70,000 adults, sleeping with light about as bright as a nightlight was linked to more heart problems years later. Luckily, darkening your bedroom is pretty easy. How to Do It: The easiest solution is an eye mask because it blocks out most of the light, although a little can still slip in around the edges. So add blackout curtains to take care of any streetlight. Also, switch off the hallway light or close the door and add a draft stopper. And the notifications flashing on your phone can disrupt your sleep without ever waking you, so turn off or cover your devices before bed. The Benefits: Over eight to 10 years, people with high nighttime light exposure had a 24% higher risk of heart attack than those with none. Shorter sleep seemed to explain part of that link, and earlier studies have tied light during sleep to depression and blood sugar problems.

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