The global obesity epidemic, affecting over one billion people worldwide, is largely driven by eating behaviors. Appetite, influenced by both intrinsic and environmental factors, plays a crucial role in weight management. A recent study how exercise affects appetite perception in obese males, shedding light on the physiological mechanisms behind hunger suppression post-exercise.

While exercise is well-known for its benefits in weight management, its direct impact on appetite control has remained a subject of debate. Appetite is regulated by a complex network of gastrointestinal and neurohormonal signals, including hormones like ghrelin, leptin, interleukin 6 (IL-6), and neuropeptide Y (NPY). These hormones influence hunger levels, satiety, and energy balance.

The study published in Physiological Reports examines investigated how moderate continuous aerobic exercise (MICE) alters these hormone levels in obese men, ultimately affecting their hunger perception. The findings reveal that certain myokines and cytokines shift dynamically post-exercise, potentially reducing appetite and offering a promising strategy for weight management.

Hormonal Responses to Exercise

The study found that after exercise, there was a significant increase in IL-6 and irisin levels in the exercise group compared to those who remained sedentary. These elevated concentrations persisted for an hour after working out. IL-6 has been associated with regulating metabolism and enhancing fat oxidation, while irisin plays a role in converting white fat into more metabolically active brown fat.

Conversely, the study reported a decrease in neuropeptide Y (NPY) levels, a key neurotransmitter responsible for stimulating appetite. The decline in NPY levels post-exercise suggests a temporary suppression of hunger, supporting the idea that exercise can curb cravings. However, the study did not observe significant changes in IL-7 or leptin levels, two other hormones involved in appetite regulation.

Why Some People Struggle to Lose Weight

Ghrelin, often called the “hunger hormone,” stimulates appetite by increasing activity in specific areas of the brain. Individuals with higher ghrelin levels generally find it harder to lose weight because their bodies signal hunger more frequently.

Research suggests that dieting can lead to an increase in ghrelin levels, making weight loss challenging. Certain medical conditions, such as Hashimoto’s thyroiditis, Prader-Willi syndrome, anorexia nervosa, and bulimia nervosa, are also linked to elevated ghrelin levels, complicating appetite regulation further.

Challenges in Implementing Exercise for Appetite Control

While exercise has clear benefits, the findings should be interpreted with caution. He pointed out that the study had a small sample size, making it difficult to draw definitive conclusions.

Moreover, he highlighted the challenges faced by obese individuals in maintaining an intensive exercise routine. While exercise-induced appetite suppression is promising, consistently engaging in high-intensity workouts may be unrealistic for those who struggle with mobility or fitness levels. More extensive studies are needed to determine the optimal exercise duration and intensity for effective appetite suppression.

Tips to Naturally And Safely Suppressing Appetite

Besides exercise, there are several strategies individuals can use to naturally suppress their appetite and improve satiety:

Increase Protein Intake: Protein-rich foods, such as lean meats, legumes, and dairy, promote feelings of fullness and reduce hunger.

Stay Hydrated: Drinking water before meals can help control portion sizes and prevent overeating.

Opt for Fiber-Rich Foods: Whole grains, vegetables, and fruits high in fiber take longer to digest, keeping you full for longer.

Reduce Simple Carbohydrates and Sugars: Simple carbs and sugars cause rapid spikes and crashes in blood sugar levels, leading to increased hunger.

Prioritize Sleep: Poor sleep disrupts hunger-regulating hormones, making it harder to control cravings.

Manage Stress: Chronic stress increases cortisol levels, which can lead to overeating and weight gain.

The study’s findings indicate that moderate exercise can temporarily suppress appetite by altering key hormones. While more research is needed to refine the details—such as optimal workout duration and intensity—this insight adds to the growing body of evidence supporting exercise as a tool for appetite regulation and weight management.

For individuals looking to curb cravings and maintain a healthy weight, incorporating a well-balanced diet alongside regular exercise remains the most sustainable approach. Future studies focusing on larger populations and long-term effects could provide deeper insights into how exercise can be optimized for appetite control, making it an effective strategy in combating obesity.

Exercise alone is not a magic solution for weight loss, but its impact on appetite hormones presents a promising avenue for managing hunger and energy balance. As research continues to evolve, it becomes increasingly clear that integrating physical activity with mindful eating habits can play a vital role in achieving and maintaining a healthy lifestyle.

For years, the weighing scale has been one of the simplest ways to assess health. A person with a “normal” Body Mass Index (BMI) is often considered healthy, while being overweight or obese is viewed as the primary warning sign. But what if someone looks slim on the outside and still carries a significant metabolic risk on the inside?

This is where the concept of TOFI—“Thin Outside, Fat Inside” becomes important. TOFI describes individuals who may have a normal BMI or appear lean but carry a higher proportion of visceral fat—fat stored deep inside the abdomen around vital organs. Unlike the visible fat under the skin, visceral fat is metabolically active and can contribute to inflammation, insulin resistance and other metabolic abnormalities.

Research has shown that Asian Indians tend to develop abdominal and visceral fat at lower BMI levels compared with several other ethnic groups. They may also have relatively lower muscle mass. As a result, a person can appear slim, have a seemingly reassuring weight, and yet have an increased risk of metabolic disease.

Why does this matter?

Also read: From Insulin Resistance to Fertility: Understanding the Metabolic Side of PCOS

The important message is that BMI alone does not tell the complete story. BMI measures weight in relation to height, but it does not distinguish between muscle and fat or indicate where fat is stored. That is why measurements such as waist circumference can provide valuable additional information. A larger waist can indicate increased abdominal fat and may signal higher cardiometabolic risk even when BMI falls within the normal range.

Being normal weight does not automatically mean being TOFI. However, people with a sedentary lifestyle, low muscle mass, increasing waist circumference, family history of diabetes, unhealthy dietary patterns, poor sleep or metabolic abnormalities may warrant closer assessment.

Simple health checks such as blood pressure, fasting glucose or HbA1c and lipid profile can provide important clues. Depending on the individual and clinical situation, doctors may also recommend assessment of liver health or body composition.

What can we do?

The solution is not simply to focus on losing kilograms. For a normal-weight person carrying excess visceral fat, the goal should be to improve body composition and metabolic health. Regular physical activity—particularly strength training combined with aerobic exercise—can help build or preserve muscle and improve insulin sensitivity.

A balanced diet rich in vegetables, whole grains, pulses, adequate protein and fibre, while limiting excess refined carbohydrates, sugary foods and ultra-processed foods, is equally important. Adequate sleep, stress management and avoiding prolonged sedentary periods are also essential components of metabolic health.

By Dr Farah Ingale, Director - Internal Medicine & Consultant – Diabetologist, Fortis Hiranandani Hospital, Navi Mumbai

We have always been told that truly sustainable weight loss is a long-term process made up of daily physical activity, healthy eating, and regular sleep. However, a four-minute workout from Japan, which has taken social media by storm, has confidently challenged this idea.

Making an ambitious promise, the makers of the workout claim that one can lose around 5 kg in just one week with the 4-minute workout.

The video, which was reshared on social media, has crossed 3 million views on X, with nearly 60,000 likes, has sparked a debate whether the short routine could really replace a longer gym session.

The virality of the video makes sense. Most of us argue with ourselves everyday, trying to talk ourselves out of going to the gym and spending hours toiling away. But do we realistically need just a few minutes to get in shape?

You don't need dumbbells, gym membership, or any special equipment to do this workout routine. You can apparently do it almost anywhere.

Can You Actually Lose 5 Kg In 7 Days?

Also read: Novak Djokovic’s Health Struggles At US Open: Are The Demands Of Elite Tennis Becoming Too Much?

There is no evidence that four minutes of exercise a day can make someone lose 5 kg of body weight in seven days. The viral claim comes from the makers of the video, rather than a clinical study showing that people following the routine lost 5 kg in a week.

Experts also say that such a drastic amount of weight loss in seven days is not realistically achievable for most people.

Additionally, what appears on the weighing scale can also move up or down because of water retention, food in the digestive system, and other short-term changes. A sudden drop in weight therefore does not necessarily mean that 5 kg of body fat has disappeared.

Losing considerable body fat needs more than just a 'very short workout'. Along with at least 30 minutes of physical activity, one needs a sustained calorie deficit.

The Four Minutes Of Exercise Is Not Completely Useless

Also read: What Is Zone 2 Cardio? The Workout Everyone Is Talking About

Now as the facts are clear, we would be remiss to not appreciate the routine's biggest potential, which is getting inactive people to move, not weight loss.

Four minutes of activity is certainly better than spending those four minutes sitting still. If a short routine like this Japanese workout feels manageable enough to turn it into a daily habit, it can give you a starting point for physical activity, which you can gradually increase.

But one needs to be careful. A short workout routine usually makes your heart work harder. If you experience pain, dizziness, chest discomfort, or an irregular heartbeat, you must stop immediately.

People who are new to exercise or have existing health concerns should speak with a doctor before starting a new routine.

How To Lose Weight Safely?

Rather than trying to take a shortcut and achieve a drastic weight loss in less days, opt for a more sustainable approach is to gradually increase daily movement and combine it with a balanced diet.

Novak Djokovic, the 24-time Grand Slam champion, suffered his earliest Grand Slam exit in 20 years after crashing out in the first round of the US Open with a five-set defeat to Argentina’s Mariano Navone.

Djokovic was left in tears after bouts of vomiting, cramping and pain. He also relied on multiple medical timeouts, an inhaler and pills to stay on the court.

“I despised every moment I was on the court,” Djokovic told the media after the match, adding that he had been dealing with similar issues throughout the season.

“I think it was obvious that it was an awful feeling on the court for me. It’s something that I’ve been carrying, unfortunately, pretty much every match this year,” he said.

Djokovic described how his body broke down during the match.

“Vomiting, throwing up, a serious issue there. Then my whole body starts to collapse, basically cramping and pain. The back just gave up in the end and my shoulder, and I couldn’t close it out,” he added.

The defeat ended Djokovic’s hopes of winning a 25th Grand Slam title at this year’s US Open.

Also read: 47-Year-Old Assam Doctor Dies After Collapsing In The Gym: When Can Exercise Trigger A Cardiac Emergency?

Similar Struggles In Cincinnati

Earlier this month at the Cincinnati Open, Djokovic, who holds the all-time men’s record of 428 weeks as world No. 1 in singles, also struggled physically throughout his second-round match.

The 39-year-old was seen crouching on all fours between points, required a medical timeout and appeared to vomit into towels as extreme heat and humidity took a toll.

He then suffered a surprising second-round defeat, losing to Argentina’s Thiago Agustín Tirante 2-6, 6-4, 6-4.

Following the defeat, Djokovic revealed that he had been dealing with a longstanding health condition that becomes particularly difficult to manage in hot and humid conditions.

“It’s because of a health issue I have,” Djokovic told reporters after the match. “I’ve been dealing with it for many years now. It causes me a lot of problems, especially when there’s a lot of humidity and heat.”

Is Elite Tennis Becoming Too Demanding?

Read More: What Keeps Messi and Ronaldo Biologically Younger Than Their Age? Experts Explain

Djokovic is not alone in facing physical challenges. His exit comes after world No. 1 Jannik Sinner withdrew from the tournament due to injury, while defending champion Carlos Alcaraz entered the event after a long break.

Other names include Italy’s Lorenzo Musetti and France’s Arthur Fils who missed earlier Grand Slams in 2026 with injuries, and No. 2 seed Elena Rybakina managing a heel injury ahead of her opener.

Together, these developments raise a broader question: Are the demands of elite tennis becoming too much for even the world’s best players?

While Djokovic has not revealed the nature of his illness, he told reporters that he is “trying” to address the ailment.

Age, Recovery And The Demands Of Tennis

In 2023, Djokovic acknowledged that his body was beginning to feel the effects of a long career, although he still felt he had fuel left in the tank.

“The desire is still there, but things can change quickly – I am 36, I’ve been a pro for 20 years.”

He said he did not view age as a decisive factor, instead focusing on his overall physical condition and whether he continued to enjoy playing.

Age can affect tennis performance through changes such as reduced muscle mass, slower recovery and lower aerobic capacity, which can also increase injury risk.

Year-round Tours, Extreme Heat

In addition to performance pressures, the grueling schedules of the ATP and WTA Tours that span nearly 11 months of the year, give athletes limited time to rest and recover from injuries.

At the same time, rising global temperatures and intense matches lasting up to five hours have added further physical challenges.

“We’re losing the battle overall despite the advances in sports medicine,” Neeru Jayanthi, who leads the tennis medicine programme at Emory Healthcare in Atlanta, told The Straits Times.