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.

Walking may feel slower, harder and more tiring as we get older, but scientists say the reason could be more than simply losing muscle strength.

New research has found that ageing changes the way the ankle and surrounding muscles work during every step, causing the body to prioritise stability over walking efficiency. It may help older adults stay upright, but it also means walking requires more effort and produces less forward movement.

The study, led by researchers from Flinders University and the University of Canberra, analysed movement data from 107 healthy adults aged 26 to 86. The findings were published in Gait & Posture.

What Changes In The Body as You Age?

One of the key changes that happens in the body as we age are around the ankles. Researchers found that older adults are more likely to activate opposing muscles around the ankle at the same time, a phenomenon called co-contraction. This makes the ankle joint stiffer when the foot hits the ground.

That stiffness can provide greater stability, essentially helping the body feel more secure with every step. But it could have an adverse effect.

“As we get older, the body starts to favor stability over efficiency,” said lead author Dr Cody Lindsay, a sport and exercise technology expert at Flinders University. “That helps keep us upright, but it also makes walking more of an effort.”

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

Walking Become Slower As We Age

The researchers also found that older participants generated less push-off power with each step. The push-off phase is the moment your foot pushes against the ground to propel your body forward.

When that push becomes weaker, the body travels less distance with each stride. This results in shorter steps, slower walking speeds and more fatigue.

The nervous system appears to be partly responsible for this change. Rather than maximising speed and energy efficiency, it adopts what researchers describe as a “safety-first” strategy that favours stability and control.

Associate Professor Maarten Immink, co-author of the study, said this may also make it harder for older adults to recover from trips or slips, potentially increasing the risk of falls.

Also read: One Bad Landing Can Change Everything: Avoid These Common Knee Injury Mistakes

The findings help explain why an older person may feel increasingly tired after walking a distance that once felt easy.

It may not simply be that their muscles have become weaker. The entire movement strategy changes as we age.

The body is effectively spending more muscular effort to maintain stability while getting less forward movement from each step. It reveals an important biological behaviour that surfaces due to aging.

This can also affect confidence and independence. Researchers say people may notice that they tire more quickly or feel less steady, especially while when walking on uneven surfaces.

Exercise May Help

The researchers say maintaining mobility may require more than traditional strength training. Exercises that challenge balance, coordination and lower-leg strength could help the body maintain better movement control as it ages.

Dr Lindsay recommends regular physical activity, balance exercises such as tai chi, lower-leg strengthening and activities that challenge coordination.

“Staying active is one of the most important things people can do,” he said, adding that consistent exercise could help people remain mobile and independent for longer.

For years, fitness culture had one rule - a workout does not count if you didn’t finish it drenched in sweat and questioning your life choices. Zone 2 cardio throws that rule out. It asks you to slow down instead of speed up. Imagine a simple walk, a lazy cycle, or a jog slow enough to chat about your weekend - that is Zone 2. You are definitely properly working, just not gasping like you have just outrun a bear. And honestly that is what everyone wants.

What Exactly Is Zone 2 Cardio?

In simple terms, Zone 2 refers to a moderate level of aerobic exercise where your body is working steadily without reaching high-intensity territory. Your heart rate rises and your breathing picks up, but conversation is still possible, even if a little breathless. The trick is holding that pace for a good while, not sprinting full on and then collapsing once the workout is done. There is no single heart rate number that suits everyone, since age, fitness level and resting heart rate all shift your personal range. That is why simply copying your friend’s smartwatch target is not necessarily useful. The easiest check? If you can still talk, you are roughly there.

How Do You Find Your Zone 2 Heart Rate?

If you want to measure your personal range, start with calculating your maximum heart rate. The standard formula is:

Maximum heart rate = 220 - your age

This gives you an estimate, rather than an exact measurement. If you want precision a supervised stress test gives a proper reading. Once you have that number, Zone 2 sits at roughly 60 to 70 percent of it. Multiply by 0.6 for the lower end and 0.7 for the upper end, and there is your range. Your resting heart rate is worth knowing too, usually 60 to 100 beats per minute for most adults. It will not change the maths above, but it says something about your general fitness.

The Talk Test Is Your Shortcut

Start with speaking in full sentences, pausing now and then for breath, and you are officially in Zone 2. Another way is to sing along to the radio without missing a beat, and steadily picking up the pace. If you are struggling to get out more than a word or two, slow down, do not hurry. It is never as exact as a heart rate monitor, but it works.

What Are The Benefits Of Zone 2 Cardio?

Regular aerobic activity supports heart health, and official guidelines recommend 150 to 300 minutes of moderate exercise a week, plus strength training on two or more days. Zone 2 makes that target feel achievable rather than punishing. Walk, cycle, swim, jog or row, whatever you do, it definitely counts.

Is Zone 2 Cardio Safe?

For most healthy adults, yes, absolutely, it is about as low risk as exercise gets. If you are new to working out, then start slow and build from there. If you have a medical condition, have barely moved in months, or notice chest pain, dizziness or serious breathlessness while exercising, talk to a doctor first. And remember, the 220-minus-age formula is a quick estimate, not definitive.

Certain moments that look ordinary, like a missed landing after a box jump, a sudden pivot on the basketball court, or a squat jump gone wrong at the gym, are behind some of the most common knee injuries orthopaedic doctors treat every week.

The anterior cruciate ligament, commonly known as ACL, is located deep inside the knee and works to keep the shinbone from sliding too far forward. A study was conducted in 2025, covering sports-related knee and shoulder injuries among athletes in Haryana, one of India's leading Olympic-medal-contributing states. The study found ACL rupture to be the single most common injury, accounting for close to 61% of cases. The same study found that knee injuries make up about 41% of all sports-related trauma, with the ACL responsible for roughly a fifth of that share.

Separately, a five-year study of sports injuries in Haryana found ACL rupture to be the leading injury among young athletes, with the majority of affected patients between 16 and 20 years old. These numbers point to a pattern orthopaedic doctors see often among the cases, which is young people get hurt more often during ordinary training, not just in high-level competition.

The Landing Problem

Most people focus on how high they can jump, but only a few think about how they land. A stiff landing, with knees locked or barely bent, sends the full force of impact straight into the knee joint instead of spreading it across the hips, knees, and ankles. Doctors also watch for a pattern called knee valgus, where the knees cave inward as a person lands or changes direction. This inward collapse puts significant strain on the ACL and is one of the clearest warning signs seen during a clinical assessment.

Fatigue makes this worse. Toward the end of a workout or a match, muscles tire and control weakens. This is when landings tend to get sloppier, form breaks down, and injury risk climbs, particularly during the last few reps of a session or the final minutes of a game.

Also read: Dream Of Becoming A Footballer Or Cricketer? Cardiologists Reveal Heart-Healthy Habits For Young Athletes

Common Gym Mistakes

Several habits come up repeatedly in orthopaedic clinics:

• Jumping onto boxes or platforms without practising a controlled landing first
• Skipping a proper warm-up before explosive movements such as squat jumps or burpees
• Progressing to heavier loads or higher jumps before building basic strength in the hips and glutes
• Ignoring persistent knee discomfort instead of resting and getting it checked
• Training on hard or uneven surfaces without appropriate footwear

Weak hip and glute muscles are a recurring factor. When these muscles cannot control the leg properly, the knee ends up compensating, and that shifts strain onto the ACL and surrounding structures. The Haryana study also found that kabaddi and wrestling accounted for the highest share of these injuries, sports that involve repeated pivoting, gripping, and sudden changes in direction.

What Helps?

Orthopaedic doctors generally recommend building strength in the hips, glutes, and core before increasing the intensity of jump training. Practising soft, controlled landings, with knees bent and aligned over the toes rather than caving inward, makes a measurable difference. Gradual progression is equally as important. Increasing jump height, load, or intensity too quickly does not allow the muscles and ligaments time to adapt.

Persistent knee pain, swelling, or a feeling of instability after jumping or pivoting should never be pushed through. These are signs worth getting evaluated early, since catching a problem before it becomes a full tear usually means a simpler and shorter road to recovery