BMI has been the benchmark in evaluating health and fitness for many years. The formula is quite simple: weight in kilograms divided by the square of height in meters. This would easily tell if one is underweight, within the healthy weight range, overweight, or obese. But with new research findings, scientists are now questioning its accuracy and usefulness as a total measure of body composition.

The report, published in The Lancet Diabetes & Endocrinology, has sparked a global conversation on rethinking BMI. Supported by more than 50 international medical experts, the report suggests classifying obesity into "clinical" and "pre-clinical" types for better diagnosis and treatment. The shift underscores a growing consensus: BMI alone may not tell the full story of your health.

While BMI is simple to calculate and universally accessible, it is far from perfect. It does not consider muscle mass, bone density, or fat distribution, leading to misleading conclusions in some cases. For example, athletes with a high muscle mass may be considered overweight, whereas individuals with normal BMI might carry unhealthy amounts of visceral fat.

A landmark study in JAMA Network Open studied more than 155,000 postmenopausal women and found that women with a normal BMI but a waist size over 35 inches were more likely to die from heart disease or cancer compared with their counterparts whose waists are smaller. That makes a great case for how BMI can be insufficient and fat distribution must be factored into account.

Not all body fat is equal. Subcutaneous fat, which lies just beneath the skin, is relatively harmless. The real health danger lies in visceral fat—fat that surrounds internal organs. Unlike subcutaneous fat, visceral fat is metabolically active, releasing stress hormones like cortisol and inflammatory substances that raise blood pressure, blood sugar, and cholesterol levels. These effects significantly increase the risk of conditions such as heart disease, type 2 diabetes, and certain cancers.

BMI Isn't Always the Best Measure of Body Composition — Here's What to Use Instead

Since BMI is not the most reliable measure, scientists and doctors have sought other means to measure body composition more accurately.

1. Waist Circumference

A simple tape measure can provide valuable insight into your health. Measure your waist at the level of your belly button, ensuring the tape is parallel to the ground. For women, a waist measurement under 35 inches is considered healthy, while for men, the goal is under 40 inches.

2. Waist-to-Hip Ratio

This is the ratio of your waist circumference to that of your hips. To calculate it, divide your waist measurement by your hip measurement. According to the National Center for Biotechnology Information, a ratio under 0.8 for women and 0.9 for men is considered healthy.

3. Body Roundness Index (BRI)

A newer method that seems to be receiving more attention involves the Body Roundness Index or BRI: height, weight, and girth are placed together to represent a more advanced view of what body composition says. Research presented in JAMA Network Open offers evidence that this BRI predicts mortality risk greater than BMI in some cases- a promising weapon for public health.

Also Read: Using BMI To Classify People As Obese Is Flawed Say Experts

Ways To Cut Off Unhealthy Fat

The good news is that visceral fat responds well to lifestyle changes. Here are three evidence-based strategies:

Time-Restricted Eating

Adopting an eating window of 12 hours—such as from 7 a.m. to 7 p.m.—can significantly reduce visceral fat, according to a study published in Nutrition Research Reviews. This approach not only helps control caloric intake but also reduces late-night snacking, a known risk factor for abdominal obesity.

Limit Alcohol Intake

Excessive alcohol consumption is associated with increased belly fat. A 2017 study published in Public Health Nutrition revealed that alcohol increases the levels of insulin and encourages the storage of fat in the abdominal area. Limiting alcohol to occasional indulgence helps avoid weight gain in this region.

High-Intensity Interval Training (HIIT)

HIIT involves repeated episodes of high-intensity exercise separated by periods of rest. A review in *Sports Medicine* concluded that HIIT is very effective in reducing visceral and total body fat. It can be noted that adding just 20 minutes of HIIT two times a week can make all the difference.

The reliance on BMI as a sole indicator of health is increasingly being challenged. While it remains a convenient screening tool, its limitations necessitate a broader approach that considers factors like fat distribution, waist circumference, and new metrics such as BRI.

In the simplest of words, health is multi-dimensional, and shifting perspectives from considering weight solely to broader measures of body composition will get people a much clearer understanding of where their health risks are so that they can take the action required for a better quality of life. Through adjustment to diet, exercise, or perhaps through innovative metrics like BRI, health is well within reach of the individual.

This dynamic conversation raises the point about personalized health screenings, which helps everyone get more relevant tools fitting their unique lives and circumstances. As body composition research is enhanced, so do the futures look brighter and brighter for the times of measurement when it comes to health.

Definition and diagnostic criteria of clinical obesity. The Lancet Diabetes & Endocrinology.

Association of Normal-Weight Central Obesity With All-Cause and Cause-Specific Mortality Among Postmenopausal Women. JAMA Netw Open. 2019

Waist-Hip Ratio. NIH.

Physiological responses to food intake throughout the day. Nutr Res Rev. 2014

Association between abdominal obesity and alcohol drinking pattern in normal-weight, middle-aged adults. Public Health Nutr. 2017

Researchers at University College Cork, led by Professor Yvonne Nolan, have found key biological reasons why exercise can help protect your mental health, even if you eat a typical Western diet high in fat and sugar. Your diet plays a huge role in keeping your brain healthy. Studies have shown that eating processed foods can increase your chances of developing memory and thinking issues.

However, this one habit can help you keep these issues at bay, according to researchers. The study, published in the journal Brain Medicine, shows that regular running can reduce symptoms similar to depression that are often caused by unhealthy eating. These protective effects involve changes to your gut and hormones.

Can You Eat Junk If You Exercise Enough?

To figure out how diet and exercise influence the brain, the researchers studied adult male rats for seven and a half weeks. One group of rats ate a standard healthy diet, while the other group ate a rotating "cafeteria diet" of high-fat, high-sugar foods (like ultra-processed meals).

In both diet groups, half of the animals were given a running wheel to exercise freely. This setup allowed the team to clearly see the separate and combined effects of the poor diet and physical activity on the animals' mood and brain.

The main finding was positive

Voluntary running had an antidepressant-like effect on the rats, even those eating the unhealthy cafeteria diet. This suggests that getting regular physical activity can be helpful for a person's mood, even if they struggle to completely change their eating habits.

Mood and Memory

While the unhealthy diet didn't severely harm the rats' learning or memory skills, exercise slightly improved their ability to navigate. The researchers also noticed mild anti-anxiety effects from exercise that occurred regardless of what the animals were eating.

Can Your Diet Affect Your Mental Capacity?

The high-fat, high-sugar diet severely messed up the chemicals produced in the gut (called metabolites). The researchers analyzed the contents of the caecum (a part of the large intestine) and found that the unhealthy diet affected 100 out of 175 chemical compounds they checked.

Exercise helped to restore the balance, particularly increasing three metabolites—anserine, indole-3-carboxylate, and deoxyinosine—that are known to be important for regulating mood.

The study did find one complex finding related to brain growth. In rats that ate the standard, healthy food, exercise strongly boosted adult hippocampal neurogenesis (the creation of new brain cells in the hippocampus, the area linked to memory and emotion).

However, the cafeteria diet prevented this usual exercise-induced increase in new brain cells. This suggests that while exercise helps mood regardless of diet, a poor diet might actually stop the brain from fully gaining some of the deepest, cellular-level benefits of physical activity.

Is Exercise Good For Your Mental Health?

This research has important real-world meaning. As an accompanying editorial noted, the fact that "exercise has an antidepressant-like effect in the wrong dietary context... is good news" for people who find it very hard to switch to a perfect diet.

The findings give biological proof that exercise can be an effective tool for improving mental well-being even when facing the challenges of modern, processed foods.

Future research will need to study women and explore longer periods of exercise, but this study provides a strong foundation for using lifestyle changes to support mood and brain function.

If you have made exercise a regular part of your life, you have probably wondered when the ideal time to work out really is. Should you lace up your shoes first thing in the morning, hit the gym after work, or mix it up depending on your schedule?

According to the American Heart Association, adults should aim for at least 150 minutes of moderate aerobic exercise or 75 minutes of vigorous activity each week, ideally split across several days. Adding resistance or strength training three times a week can provide even greater benefits. But what do fitness experts say about the best time to get moving?

Should I Work Out in the Morning or at Night?

Both morning and evening workouts come with their own advantages, but what matters most is consistency. The best workout time is simply the one that fits into your daily routine and keeps you moving regularly.

The Centers for Disease Control and Prevention (CDC) also recommends getting 150 minutes of aerobic exercise per week—activities like brisk walking, cycling, or jogging all count. It’s more effective to work out four evenings a week than to squeeze in only two early morning sessions.

Working Out in the Morning

Exercising early has a clear advantage, you can get it done before the rest of the day begins. Research also suggests that morning workouts can improve sleep patterns, regulate mood, and even support weight management.

Boosts Your Mood

Exercise releases endorphins, the body’s natural “feel-good” chemicals. Studies show that even short sessions of regular physical activity can lift your mood and lower cortisol, the stress hormone. Starting the day with lower stress levels can help you feel more focused and positive throughout the day.

Improves Sleep Quality

Morning exercisers often enjoy deeper, more restful sleep. One study found that those who worked out early tended to fall asleep faster, spend more time in deep sleep, and wake up less during the night.

May Lower Blood Pressure

Morning workouts can help stabilize blood pressure, particularly in women. Research suggests that women who exercised early in the day experienced lower post-exercise blood pressure, while men saw similar results when exercising in the afternoon.

Might Help You Lose Weight

Timing might play a role in how your body responds to exercise. One study found that people who worked out before noon lost more weight than those who exercised later in the day. Early exercisers were also more active overall, taking more daily steps. However, more research is needed to confirm these findings.

Downsides Of Morning Workout

Despite the perks, morning workouts aren’t without drawbacks:

• Higher injury risk: Your body temperature is lowest right after waking up, which means less blood flow and muscle flexibility. This can increase your risk of strains or sprains. A proper warm-up can help prevent this.
• Low energy: Exercising on an empty stomach can make you feel weak or tired. Eating a small, protein-rich snack the night before or before your workout can help.

Working Out in the Afternoon or at Night

While early workouts offer plenty of advantages, exercising later in the day has its own set of benefits that may suit your body and lifestyle better.

Benefits Of Working Out in the Afternoon or at Night

• Better sleep quality: Moderate evening workouts can promote deeper, more restorative sleep and improve mental clarity and energy levels.
• Increased strength: Muscles follow a natural circadian rhythm, peaking in strength and flexibility in the afternoon or evening. This can enhance performance and help you lift heavier or move more efficiently.
• Stress relief: Evening workouts can be an excellent way to unwind after a long day. Physical activity triggers endorphins that improve mood and reduce tension.
• Social motivation: Friends and family are often more available later in the day, making evening workouts a good opportunity for shared fitness goals and accountability.
• Lower injury risk: Your body temperature is naturally higher in the evening, which helps muscles warm up faster and reduces stiffness.

Downsides Of Working Out in the Afternoon or at Night

• Sleep disruption: High-intensity exercise close to bedtime can leave you too energized to fall asleep easily. If you prefer nighttime workouts, stick to moderate activities like yoga or a brisk walk.
• Limited class options: Some gyms or studios may offer more morning classes than evening ones.
• Inconsistency: Evening schedules can get crowded with social plans or work commitments, making it harder to maintain a regular exercise routine.

How To Create a Workout Routine?

No matter the time of day, staying consistent is what truly makes the difference. Creating a set routine can help you build momentum and stick to your fitness goals long-term.

Morning and evening workouts both offer unique benefits and a few drawbacks. Some studies suggest morning exercise may deliver slightly better results overall, but the best time to work out is the time that fits your life. What counts is showing up for yourself and keeping the habit steady.

Walking is said to be one of the best exercises. Not only is it an easy and accessible exercise, but it can be done anywhere and also does not need a lot of equipment. Many people aim for 10,000 steps a day as a sign of good health. But should you take one long walk, or multiple short ones? A new study has answered this question.

New research suggests that a single, longer walk each day is better for your heart than breaking up your steps into many short strolls, especially if you don't exercise regularly.

The study, published in Annals of Internal Medicine, found that walking for at least 15 minutes without stopping is ideal. This longer, steady pace, which is about 1,500 continuous steps gives your heart a much better workout.

Longer Vs Shorter Walks: Which is Better?

Researchers tracked the walking habits of over 33,500 adults in the UK who walked less than 8,000 steps a day. After tracking their health for eight years, the findings were clear:

Lower Heart Risk

People who consistently walked in longer, uninterrupted stretches had a lower risk of heart problems compared to those who only took short, quick bursts of steps.

Why Are Longer Walks Better For Health?

Even among the least active group (those walking under 5,000 steps daily), taking longer walks made a major difference. Their risk of heart disease and early death dropped significantly.

The researchers explain that most people focus only on the number of steps they take, but not the patterns. They suggests that even inactive people can boost heart health by changing their habits to walk for at least 10–15 minutes at a time.

Should People Focus More On How They Walk Or How Much?

Many people aim for 10,000 steps a day, but that number actually came from an old pedometer advertisement, not science. While experts agree more steps are generally good, this study emphasizes that how you walk matters more than just the total step count.

The researchers suggest that simple changes, like setting aside time specifically for a long walk, could make a big impact on heart health.

The NHS still recommends getting 150 minutes of moderate activity like brisk walking, each week, and ideally it should be spread out. For older adults, moving every day, even with light activity around the house, is key.

It's important to know that while the study shows a strong link between longer walks and better health, it doesn't definitively prove that walking directly causes the improvement.

However, health experts agree exercise is vital. They explain that you might find it hard at first, but it will get easier as your body adjusts. Even small improvements contribute to a healthy heart.

What Are Some Safety Tips for Walkers?

While walking is generally a safe activity, accidents can happen, especially if you like to walk alone. To stay safe while walking,

Be Visible

Wear bright, reflective clothing or carry a flashlight after dark or in dim light so drivers and others can easily spot you.

Stay Alert

Focus on your immediate surroundings; avoid distractions like your phone or headphones to always know what's happening around you, especially traffic.

Use Paths

Walk or bike only on marked paths, lanes, or sidewalks, and cross streets at designated crosswalks where vehicles are expecting pedestrians.