When was the last time you measured your waistline? If you assume that BMI is the only number to focus on when it comes to your health, think twice. New research has revealed a shocking revelation—your waist circumference might be a far better predictor of men's cancer risk than BMI.

The study finds that for each 4-inch increase in waist size, a man's risk of cancer increases by a staggering 25%. Meanwhile, BMI, commonly regarded as the gold standard for assessing obesity, raises cancer risk by only 19% for the same weight gain. So, if you've been dismissing that pesky belly fat, it's time to take notice.

But why is your waistline so important? The reason is visceral fat—the hidden, deep fat that accumulates around your organs. Unlike other body fat, visceral fat is a stealthy troublemaker, causing inflammation, insulin resistance, and abnormal blood fat levels—all of which combine to create a cancer-perfect storm.

Obesity has been associated with an increased risk of numerous health conditions, including cancer, for decades. The research, though, indicates that a specific measure of the body—waist circumference—may be an even more reliable forecaster of cancer risk in men than the more frequently employed Body Mass Index (BMI). This finding emphasizes the need to pay particular attention to the distribution of fat and not merely to the weight of the body.

BMI has been the go-to measure for years for gauging health risks related to obesity. New research, though, that appears in The Journal of the National Cancer Institute indicates that waist measurement is a better predictor of cancer risk in men. According to the research, four more inches (10 cm) around the waist will add 25% to a man's cancer risk. Conversely, a 3.7 kg/m² rise in BMI (from a BMI of 24 to 27.7) increased cancer risk by only 19%.

Why is waist circumference a better predictor, then? Unlike BMI, which measures weight relative to height, waist circumference actually measures abdominal fat—specifically, visceral fat. This type of fat encircles internal organs and is also linked to higher levels of inflammation, insulin resistance, and abnormal blood lipids, all of which are factors in cancer growth. BMI, however, does not measure fat distribution, so two individuals with the same BMI can have very different levels of health risk depending on where fat is deposited on their bodies.

Why Men Are at Higher Risk?

Interestingly, the research identified a significant difference between men and women when it came to waist circumference and cancer risk. Although waist circumference and BMI were linked with obesity-related cancers in women, the relationship was weaker than for men. An increase of 12 cm (4.7 inches) in waist size or a 4.3 rise in BMI (from 24 to 28.3) raised the cancer risk in women by just 13%—a much lower percentage than for men.

Experts credit this difference to the way that fat is stored in the body. Men are more likely to carry fat around the abdomen, especially as visceral fat, which is more metabolically active and associated with cancer-producing biological alterations. Women, by contrast, store fat in peripheral sites such as the hips and thighs, where it is less likely to drive systemic inflammation and metabolic disturbances.

A possible reason is that men tend to depot fat more in the visceral regions, whereas women tend to carry more subcutaneous and peripheral fat," wrote the researchers. "This may render waist circumference a more robust risk factor for cancer in men and account for why waist circumference provides additional risk information beyond BMI in men but not women."

Cancer Types Most Linked to Abdominal Fat

The research used the International Agency for Research on Cancer (IARC) data to define obesity-related cancers. These cancers are esophageal (adenocarcinoma), gastric (cardia), colorectal, rectal, liver, gallbladder, pancreatic, renal, and thyroid cancers, and multiple myeloma and meningioma. In men, abdominal obesity is especially significant in raising the risk of these cancers through high levels of insulin and markers of inflammation.

For women, the research proposes that both waist circumference and hip circumference may give a more accurate estimate of visceral fat and cancer risk. "Adding hip circumference to risk models could strengthen the link between waist circumference and cancer, especially in women," researchers observed.

What This Means for Men's Health and Cancer Prevention?

With these results, doctors advise men to be more mindful of their waistline than only their BMI. Waist size is an easy method to gauge health risk, and its maintenance through lifestyle changes might be the key to cancer prevention.

How To Reduce Cancer Risk In Men?

Track Your Waist Size: Regularly measure your waist circumference and try to keep it in a healthy range (below 40 inches for men, according to medical advice).

Eat a Balanced Diet: A diet containing high fiber, lean protein, and healthy fats can assist in limiting visceral fat gain.

Exercise Consistently: Regular exercise with a combination of aerobic and strength training will help maintain a healthy waistline.

Control Stress and Sleep: Persistent stress and inadequate sleep tend to cause weight gain, especially in the midsection of the body.

Regular Health Screenings: Early identification of cancer risk factors through regular screening can greatly enhance long-term health status.

Prime Minister Narendra Modi proposed the idea of a dedicated yoga day during his address to the 69th session of the UN General Assembly in 2014. On December 11, 2014, all 193 UN member states unanimously agreed to observe the International Day of Yoga on June 21.

The primary objective of the International Day of Yoga is to raise awareness about yoga as a holistic practice for mental and physical well-being. Yoga originated in India, and it has a history of more than 5000 years. Some people regard it as a fashionable fitness, but it can be beneficial in various chronic diseases, including diabetes, hypertension, and chronic kidney disease.

The Challenges Faced by Dialysis Patients

Dialysis is a life-saving treatment for stage 5 CKD patients. It has to be done 2- 3 times/week. It has been seen that these patients become physically inactive, which leads to poorer outcomes. They also have a lot of comorbidities like hypertension and diabetes, besides stress. Over the last few years, scientific studies have shown that regular exercise in patients improves outcomes. These patients are a captive audience as they spend 8-12 hours in a dialysis unit every week.

Hence, many dialysis units have incorporated exercise into the dialysis sessions. Yoga has been purported to have multiple health benefits. Over the last few years, even Western science is starting to provide some concrete clues as to how yoga works to improve health, heal aches and pains, and keep sickness at bay.

Yoga: Benefits For Heart Health

Research studies have shown that Yoga lowers blood pressure and slows the heart rate. Two studies of people with hypertension, published in the leading scientific journal The Lancet, compared the effects of Savasana (Corpse Pose) with simply lying on a couch.

After three months, Savasana was associated with a 26-point drop in systolic blood pressure (the top number) and a 15-point drop in diastolic blood pressure (the bottom number), and the higher the initial blood pressure, the bigger the drop. A slower heart rate can benefit people with high blood pressure or heart disease, and people who've had a stroke. Yoga lowers LDL (“bad”) cholesterol and boosts HDL (“good”) cholesterol.

Yoga: Diabetes and Weight Management

In people with diabetes, yoga has been found to lower blood sugar in several ways: by lowering cortisol and adrenaline levels, encouraging weight loss, and improving sensitivity to the effects of insulin. If your blood sugar levels improve, there is a reduced risk of diabetic complications such as heart attack, kidney damage, and blindness.

Researchers have also found that people who practiced yoga for at least 30 minutes once a week for at least four years gained less weight during middle adulthood. People who were overweight actually lost weight. Overall, those who practiced yoga had a lower body mass index (BMI) compared with those who did not practice yoga. Researchers attributed this to mindfulness. Mindful eating can lead to a more positive relationship with food and eating.

Yoga also acts as a stress buster. It quells the fluctuations of the mind, according to it, slows down the mental loops of frustration, regret, anger, fear, and desire that can cause stress. And since stress is implicated in so many health problems—from migraines and insomnia to lupus, MS, eczema, high blood pressure, and heart attacks—if you learn to quiet your mind, you’ll be likely to live longer and healthier.

Yoga: Evidence For Dialysis Patients

There is a lack of good scientific data about the direct benefits of yoga in dialysis patients, but the absence of evidence does not mean evidence of absence. Some people regard it as a fashionable fitness, but it can be beneficial in various chronic diseases, including diabetes and hypertension. Diabetes and high blood pressure are among the commonest comorbidities in Dialysis patients. These patients are under great stress due to their kidney failure.

In another study, a 6-month yoga program was found to be a safe and effective measure as adjuvant therapy to conventional treatment modalities in reducing blood pressure, improving renal function, and improving QOL in these patients.

For the last 5 years, we have been celebrating World Yoga Day in our Dialysis unit and encouraging our Dialysis patients to regularly practice Yoga. Even after a kidney transplant, the better the blood pressure control, the longer the life of the transplanted kidney. Thus, there is enough indirect evidence that yoga is beneficial in patients with kidney diseases.

Yoga: Benefits for Kidney Disease Patients

However, it should be done under expert supervision. There are many other poses in yoga; you can choose those that are suitable for you under the guidance of a professional practitioner. In a word, practicing yoga can promote metabolism, blood circulation, and help discharge more metabolic wastes and toxins. It can improve endocrine functions and help repair damaged tissues.

It can strengthen physical fitness and enhance immunity. It can make the mind peaceful and ease pressure and chronic pains. They also assist in managing water retention in the body. This enables sound sleep schedules and hence better rest. A well-rested body is better able to perform functions such as regulating water in the body and stabilizing the heartbeat.

Precautions Before Practicing Yoga

Though yoga is safe, not every kidney failure patient can do all the poses. For example, if the patients have polycystic kidney disease, bending and other positions that can cause pressure on the abdomen and back should be avoided. If the patients have high blood pressure or lower back pain, leg lifts should be avoided. It is necessary to practice yoga under the guidance of a professional practitioner if you have kidney disease. Yoga asanas are known to increase relaxation.

There are many poses in yoga that are suitable for dialysis patients. Some of these could be done safely during dialysis sessions. However, special care should be taken to ensure that no arm movement on the side has an AV fistula where dialysis is taking place. For those patients who have a permacath (or permanent catheter), these restrictions are not that severe. Of these, I recommend the following, which can be done during the dialysis sessions, preferably before taking snacks and tea.

Yoga During Dialysis

1. Anulom vilom: A person needs to inhale through the left nostril and exhale through the right nostril, and then inhale through the right nostril and exhale through the left one. These alternate nostril breath exercises can promote blood circulation. All these are best done first thing in the morning

2. Kapaal Bhaarti: In this, the person exhales forcefully and then inhales passively. This is repeated a few times as per convenience, followed by a break and 3 – 5 sessions.

3. Bhastrika: In this, a person inhales deeply, followed by forceful exhalation. This is then reapted 3-5 times maximum.

4. Shavasana: In this one lies flat on the couch and is absolutely listless on the couch for a few minutes, with arms and legs lying loosely.

Yoga For Non-dialysis Days:

1. Vrikshaaasan: In this one stands straight and then places the right foot on the inner side of the left thigh, joins the hands, and raises them above the head. After a few minutes, the hands are brought down, and now the left foot is placed on the inner side of the left thigh, and the hands are joined and raised above the head.

2. Tada Asaan: In this, a person stands on his toes and stretches his arms above his head, and joins his hands. In this posture, he then breathes freely and holds as long as possible.

3. Cobra pose: In this, a person lies on his belly with hands flat on the floor on each side and inhales and extends the spine forward, lifts the chest and head off the floor. One needs to make sure that the legs and feet are parallel and hold this position for several breaths. This can help put mild pressure on the kidneys and revitalize the kidney functions.

4. Camel pose: In this asana, the person kneels on the floor, extends the spine, opens the chest, and reaches for the feet. One needs to make sure that the thighs are perpendicular to the floor and the toes are tucked. This posture can help improve blood circulation as well as the body’s circulatory system.

5. Paschimottanasana: In this asana, you bend forward and try to touch your toes.

6. Surya Namaskaar: It is one of the best Yogic aasanas as it involves a combination of 11 steps. You can see details on YouTube.

7. Kati chaakra aasan: in this one lies on the floor and stretches the hands on the sides and legs kept 3 feet apart. The head is turned to one side, and the knees are in the opposite direction

Thus, yoga keeps the internal organs healthy, balances the various systems in the body, and effectively controls the stress of the body and mind. Some of the yoga asanas and pranayamas facilitate internal cleansing rituals that ensure the flushing out of toxins from the body.

The life of a woman can be called a cycle of various physical and hormonal changes occurring at particular points throughout life. From menstruation at puberty up to menopause, there will be numerous changes experienced by the female body, which can bring about consequences for her physical and psychological well-being.

Being a healthcare professional, I should mention that although medication is sometimes unavoidable, there is no point in neglecting alternative ways, including yoga.

Yoga Can Help Women

Yoga is an exercise that involves asanas, pranayamas, and meditation. There is now scientific evidence indicating that yoga aids in coping with certain conditions in women. It achieves this by positively influencing the neuroendocrine, autonomic nervous system, and stress responses.

A significant number of women are victims of menstrual conditions such as dysmenorrhea, PMS, abnormal menstrual cycle, and heavy menses during their reproductive age. The conditions may become worse due to stress, since it affects hormone levels.

Yoga reduces the amount of congestion in the pelvic area, increases blood flow, increases body flexibility, and reduces stress hormones such as cortisol. Consequently, most women have painless and psychologically stable menstruation.

Yoga Can Improve PCOS Symptoms

Moreover, yoga can prove highly helpful in the case of women who are suffering from Polycystic Ovary Syndrome (PCOS). It is the most prevalent endocrine disorder that affects women of childbearing age.

The condition has insulin resistance, obesity, irregular menstruation, and metabolic conditions as its symptoms. Thus, yoga, along with healthy living, can provide some assistance in terms of improving insulin levels, maintaining weight, reducing stress, and balancing hormones.

Yoga in Pregnancy

Yoga has many advantages during pregnancy. It will ensure good posture, decrease lower back pain, increase flexibility, improve breath control, and prepare the body for delivery. In addition, prenatal yoga helps with dealing with emotional and mental issues related to pregnancy, which will have a positive effect on the mother and her baby.

Yoga During Perimenopause And Menopause

With the onset of perimenopause and menopause, the reduction in levels of estrogen is known to cause side effects like hot flashes, insomnia, irritability, exhaustion, aches in the joints, and thinning bones. All these factors have significant impacts on both the daily life activities and the emotional state of women.

The research shows that yoga may be helpful in overcoming the symptoms of menopause through relaxation, improvement in sleep, muscle strengthening, and better handling of emotions. Breathing techniques and meditation help in lowering stress and positively influencing the mental state of patients.

Apart from the specific diseases that yoga can alleviate, it promotes self-awareness, which plays an important role in managing one’s emotions. Nowadays, women tend to have a large number of duties, such as working, taking care of children, and doing housework. Chronic stress leads to many diseases, for instance, high blood pressure, obesity, heart issues, and psychological problems.

For all phases of female development, from menstruation until menopause, the emphasis should be on not just the treatment of diseases but the maintenance of wellness. While yoga cannot replace medical care, it remains an important supplement that aids in achieving physical fitness as well as mental and spiritual well-being. Through regular yoga practice, a woman will develop her resilience and become stronger in every phase of life.

(By Dr. Ruchi Bhandari, Director- Obstetrics & Gynecology, Yatharth Hospital, Noida)

Yoga can act as a "polypill" by addressing multiple underlying factors that contribute to lifestyle diseases, according to Dr. Rima Dada, Professor at the All India Institute of Medical Sciences (AIIMS), who has been studying yoga and its impact on lifestyle disorders for the past 20 years.

Speaking about her research, Dr. Rima said yoga is a profound science, technology, and art of living that can tackle factors that set the stage for a wide range of diseases.

Yoga May Benefit Multiple Health Conditions

According to Dr. Rima, yoga can help address conditions including hypertension,

• coronary artery disease,
• polycystic ovarian syndrome (PCOS),
• unexplained male factor infertility,
• primary open-angle glaucoma,
• autoimmune diseases,
• rheumatoid arthritis,
• Alzheimer's disease.

• accelerated ageing,
• shorter telomeres,
• persistent activation of the hypothalamic-pituitary-adrenal axis,
• a dysregulated immune system,
• high levels of stress and anxiety,
• inflammation,
• oxidative stress.

Yoga's For Oxidative Stress And Inflammation

Also read: Yoga Enriches Every Aspect of Life, From Fitness to Inner Peace, Says PM Modi

Dr. Rima said evidence-based studies conducted by her team have shown that yoga addresses these underlying factors.

According to the findings, yoga reduces oxidative stress by increasing the expression of various antioxidants. It also improves mitochondrial health and reduces free radicals produced as by-products of ATP production.

The studies further showed that inflammation decreases because the expression of genes coding for anti-inflammatory factors increases, while the expression of genes that promote inflammation declines.

Yoga May Support Brain Health

The research also found that yoga increases the expression of genes involved in DNA repair. In addition, yoga promotes parasympathetic dominance, resulting in increased rest, repair, and digestion.

Dr. Rima said yoga also positively modulates the epigenome and increases the expression of factors beneficial for overall health. She noted that yoga promotes brain health, improves mental well-being, and enhances the production of factors associated with neurogenesis in key areas of the brain. These changes may help improve memory and build emotional resilience.

Gut-Brain Axis and Immune Health

Read More: Trying to Quit Tobacco? Yoga Could Improve Your Chances, Suggests Study

Dr. Rima said yoga has also been shown to improve gut microbial flora, helping maintain the integrity of the gut-brain axis.

According to her, this supports the secretion of factors that help maintain immune, endocrine, and mental health.

Yoga Is An Entire Lifestyle

Emphasizing that yoga extends beyond physical postures, Dr. Rima said it is an entire lifestyle that includes diet, asanas, pranayama and dhyana.

She said yoga and asanas help bring the body into proper geometry and alignment, while also improving flexibility, range of motion and neuromuscular coordination.

This alignment, she explained, enables more effective breathing. Nasal inhalation and exhalation activate certain areas of the brain that promote a state of relaxed wakefulness.

Yoga Is The Need of The Day

Dr. Rima said effective breathing increases blood flow to the brain and raises nitric oxide levels, which help improve circulation while reducing inflammation and oxidative stress.

"Thus, yoga is a polypill and is the need of the day," she said.