A widely respected neurologist, Dr. Sudhir Kumar MD, who practises at Apollo Hospital in Hyderabad, recently took to X to highlight a simple habit he believes is more effective than many medications. According to Dr. Kumar, the one lifestyle practice that can meaningfully cut the risk of major diseases, improve longevity and transform overall well-being is nothing extraordinary — it is the act of walking.
The 30-Minute Daily Habit Dr. Kumar Recommends
Dr. Kumar explained that his most powerful health recommendation is a half-hour of walking each day. He notes that this routine can lower the likelihood of heart disease, strokes, type 2 diabetes, mood disorders and cognitive decline. He emphasised that this daily activity requires no money, and its only side effects include improved sleep quality and a brighter mood.
Research published in the Journal of the American Medical Association (JAMA) reinforces this idea. Studies show that individuals who complete around 10,000 steps daily demonstrate markedly better cardiovascular health and a reduced chance of developing dementia or several forms of cancer. Findings indicate that meeting this step count is associated with fewer strokes, less heart failure, less heart disease and a significantly lower risk of at least thirteen types of cancer. Dementia risk alone may be reduced by as much as 50 percent in those who maintain this habit.
Where the ‘10,000 Steps’ Concept Actually Comes From
Many people assume the 10,000-step benchmark originated from research, but the number dates back to a marketing campaign by a Japanese pedometer company in the 1960s. However, experts say there is real science behind why walking — especially brisk walking — generates transformative benefits throughout the body.Why Walking Has Such Profound Biological Effects
Sandra Billinger, PhD, a professor of neurology at the University of Kansas School of Medicine, studies the connection between physical activity, brain health and stroke recovery. She explains that movement directly supports heart and vascular function by circulating oxygenated blood to muscles and organs. She adds that walking triggers the release of multiple beneficial molecules that positively influence cholesterol regulation, blood sugar levels and blood pressure.
Billinger highlights a 2020 study discussed in The New York Times that documented nearly 10,000 molecular changes in the body after exercise. She notes that scientists, including teams at KU Medical Center, are continuing to explore what each of these changes means for long-term health.
How Exercise Enhances Mitochondria — the Cell’s Energy Generators
Research from Dr. Russell Swerdlow’s laboratory at KU Medical Center focuses on exercise metabolism with special emphasis on mitochondria, frequently referred to as the cell’s energy powerhouse. Mitochondrial dysfunction is linked to Alzheimer’s disease and cognitive deterioration, and Swerdlow’s work explores how these cellular structures might be strengthened.Swerdlow explains that exercise and mitochondrial activity are deeply connected. During physical exertion, the body undergoes controlled oxidative stress in the muscles, which signals the body to increase mitochondrial production. This adaptation occurs not only in muscle tissues but also in various organs, including the brain.
He further notes that the lactic acid accumulated during intense activity — the same substance responsible for fatigue — is instrumental in enhancing mitochondrial growth throughout the body. While oxidative stress is often viewed negatively, Swerdlow clarifies that in this context, it may play a crucial role in renewing and strengthening cellular energy systems.
For more news like this visit The Economic Times.A senior neurologist at Apollo Hospitals (Hyderabad), Dr. Sudhir Kumar, recently highlighted what he calls the "most powerful medicine" in the world.
The medicine he is referring to is brisk walking.
In a series of viral insights shared on social media, Dr. Kumar explained that this simple, zero-cost habit is often more effective than many prescription drugs for preventing long-term chronic illness.
Why It Is Called the "Most Powerful Medicine"
According to Dr. Kumar and supporting medical research, a daily 30-minute brisk walk (or reaching roughly 10,000 steps) triggers molecular changes that provide the following benefits:
Heart Attack & Stroke: It improves cardiovascular circulation and lowers blood pressure, reducing the risk of a major cardiac event by 20–30%.
Diabetes: Walking increases insulin sensitivity and helps the muscles use glucose more efficiently, making it a primary tool for managing or even reversing Type 2 diabetes.
Depression & Mental Health: It triggers the release of endorphins and reduces cortisol (the stress hormone). Dr. Kumar notes that its impact on mood and sleep quality can be comparable to some antidepressants for mild cases.
Longevity & Dementia: Regular movement strengthens mitochondria (the cell's powerhouse) and can reduce the risk of dementia by up to 50%.
The "Prescription" for Results
To get the most out of this "medicine," Dr. Kumar suggests focusing on three key factors:
Consistency over Intensity: 20–25 minutes of daily brisk walking is better than one heavy gym session once a week.
Brisk Pace: You should walk at a speed where you can still talk, but would find it difficult to sing.
Strength Training: He also recommends pairing walking with two short sessions of strength training per week to maintain muscle mass as you age.
The "Side Effects"
Unlike chemical medications, this "zero-cost" drug has only positive side effects:
Better quality of sleep.
Improved cognitive clarity.
Weight management without extreme dieting.
Would you like me to create a simple 4-week walking plan to help you gradually build up to the recommended 30 minutes a day?
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