Sitting

now browsing by category

 

Limiting TV Time Helps Reduce Heart Disease Risk


Reproduced from original article:
https://articles.mercola.com/sites/articles/archive/2025/04/08/tv-time-heart-disease-risk.aspx


Analysis by Dr. Joseph Mercola     
April 08, 2025

tv time heart disease risk

STORY AT-A-GLANCE

  • Spending more than two hours a day watching TV increases your heart disease risk by 12%, even if you have low genetic risk for Type 2 diabetes
  • Limiting television viewing to less than one hour daily cuts heart disease risk, even in people with high genetic risk for Type 2 diabetes, according to new research
  • Each extra hour of daily TV time raises your chances of developing heart disease by 3%, building up dangerous plaque in your arteries over time
  • Watching TV displaces physical activity, encourages junk food and alcohol consumption, and leads to sluggish blood flow and dangerous clot formation
  • Reducing your TV time and moving more helps prevent heart disease, no matter your genetics — sitting less is a simple, powerful daily change

Heart disease is the leading cause of death worldwide, taking an estimated 17.9 million lives each year.1 In the U.S., it’s the leading cause of mortality, accounting for one in five deaths. According to the U.S. Centers for Disease Control and Prevention (CDC), one person dies from this condition every 33 seconds.2

Your everyday habits play an important role in the state of your heart and overall health. One recent study confirms this — according to their findings, spending hours in front of the TV raises your risk of cardiovascular disease, and limiting your television time significantly reduces it.

Too Much TV Time Raises Your Heart Risk — Even if Your Genes Say Otherwise

A recent study published in the Journal of the American Heart Association (AHA) looked closely at the connection between television viewing, genetic risk for Type 2 diabetes, and the development of atherosclerotic cardiovascular disease (ASCVD), a condition wherein there’s a buildup of plaque in the arteries, leading to heart attacks, strokes, and other circulation problems. ASCVD affects two out of three people with Type 2 diabetes.3

• Investigating the link between prolonged TV time and heart disease — The researchers of the featured study wanted to know if sitting in front of a screen for hours every day could make heart disease more likely, even for people genetically predisposed to Type 2 diabetes. They analyzed data from 346,916 adults (with an average age of 56 years old) in the UK Biobank over nearly 14 years, making this one of the largest studies of its kind.

• The participants included healthy adults — None of them had heart disease or Type 2 diabetes when they enrolled. The researchers calculated each person’s genetic risk using 138 specific genetic variants associated with Type 2 diabetes. The goal was to see if those with medium or high genetic risk were more likely to develop heart disease based on their daily television habits.

• The results — According to their findings, people who watched two or more hours of television daily had a 12% higher risk of developing heart disease compared to those who watched for one hour or less — and this was true regardless of their genetic background.4

Limiting TV Time Reduces Your Heart Disease Risk, Even if You Have a High Risk for Type 2 Diabetes

Being sedentary, such as spending hours sitting in front of the television, directly affects your metabolism and circulation. It slows blood flow, encourages clot formation, and raises triglyceride levels. It’s also often paired with unhealthy eating habits like mindless snacking and sugary drinks. Over time, this combination will silently push you toward a heart attack or stroke.

• One surprising detail stood out — The researchers found that even if someone had high genetic risk for Type 2 diabetes, their 10-year absolute risk of heart disease was actually lower if they limited television time to less than one hour per day. Specifically, their risk was 2.13%.5

However, in people with low genetic risk who watched two or more hours daily, their risk jumped to 2.46%. In other words, sitting less helped more than good genes did.

• Each additional hour of TV time increased the risk of ASCVD by 3% — While that might seem small, add those hours up over weeks, months, and years, and you’re looking at a significant cumulative effect.

The biggest jump in heart disease risk appeared when television viewing exceeded two hours per day. At that point, sedentary behavior, poor circulation, and unhealthy eating habits — all connected to prolonged sitting — likely contributed to plaque buildup in arteries.

• Two hours (or more) of TV per day caused heart disease risk to soar — For people in the highest genetic risk group, watching two or more hours of television per day caused their risk of ASCVD to soar. They experienced the worst outcomes in the study.

But here’s good news — Even if you have a family history or genetic markers of Type 2 diabetes, cutting your daily television time to less than an hour could make a major difference. Damon L. Swift, Ph.D., FAHA, chair of the AHA’s Physical Activity Committee and an associate professor at the University of Virginia in Charlottesville, Virginia, commented:

“These findings add to the evidence that sitting time may represent a potential intervention tool to improve health in people in general, and specifically for people with a high risk for Type 2 diabetes. This is especially important because people with Type 2 diabetes are at a heightened risk for cardiovascular disease compared to those who do not have diabetes.”6

Save This Article for Later – Get the PDF Now

Download PDF

Watching Too Much TV Is One of the Most Damaging Lifestyle Habits

The researchers pointed out why television viewing is particularly harmful compared to other types of sitting — aside from the long hours you spend glued to your chair, it often goes hand-in-hand with unhealthy eating habits and even alcohol intake. This combination increases weight gain, raises blood sugar, and spikes inflammation — all of which damage the arteries over time.7

• Watching TV tends to displace physical activity — When you’re sitting for hours, you’re not moving or stimulating circulation. The body’s metabolic rate slows, and blood flow becomes sluggish. These changes set the stage for heart disease, which is particularly dangerous for people with Type 2 diabetes, as they already have an increased risk.

• Watching TV for long periods slows down your glucose metabolism — When you’re sedentary, such as when you’re watching TV, your muscles are not pulling glucose from the bloodstream efficiently. Over time, this contributes to higher blood sugar levels and insulin resistance.

The pancreas is forced to work harder, and arteries face damage from elevated blood glucose. Elevated triglycerides and LDL cholesterol levels further clog arteries, setting the stage for heart attacks and strokes.

• Long hours sitting in front of the TV leads to endothelial dysfunction — This is a condition wherein the inner lining of your arteries stops working correctly. The endothelium normally helps regulate blood vessel dilation and keeps blood flowing smoothly. When that function breaks down, clots form more easily, and plaque buildup accelerates. Add genetic risk for Type 2 diabetes into the mix, and these issues compound.

Finally, prolonged sitting triggers low-grade, chronic inflammation, which damages blood vessels and accelerates the process of atherosclerosis. This inflammation is worsened by unhealthy food choices and poor metabolic control. Combined with genetic risk, these factors multiply your chances of developing heart disease.

What Does Excessive Sitting Do to Your Body?

Excessive sitting has been linked to dozens of chronic diseases. In his book, “Get Up!: Why Your Chair Is Killing You and What You Can Do About It,” Dr. James Levine, co-director of the Mayo Clinic and the Arizona State University Obesity Initiative, notes there are about 10,000 publications showing that sitting is harmful to your health.

• Sitting is not supposed to be a way of life — Being glued to your chair, whether in front of the desk or while watching TV, puts you in a very unnatural posture that is bad not only for your back but also your metabolism.

• Being sedentary is associated with poor health outcomes — Sitting and other forms of prolonged, uninterrupted sedentary time promote cardiometabolic disorders, obesity, depression and all-cause mortality in adults and in children is linked to obesity, anxiety and depressive symptoms.8

• The human body was designed to be active — The reason why prolonged sitting impairs health and promotes disease has to do with the molecular cascades that occur upon standing. Within 90 seconds of rising from sitting to standing, the muscular and cellular systems that process blood sugar, triglycerides, and cholesterol — which are mediated by insulin — are activated.

• Being active energizes your cells — These cellular mechanisms are also responsible for pushing fuels into your cells and, if done regularly, will radically decrease your risk of illnesses. But when you stop moving for extended periods of time, it’s like telling your body it’s time to shut down and prepare for death.

The remedy is simple — Avoid sitting and get more movement into your daily routine. Learn more about this when you read “Take a Stand: The Dangers of Prolonged Sitting.”

Prolonged Sitting Takes a Toll Even if You Exercise

Many people defend their sedentary lifestyle by claiming that they “offset” the time they spend sitting down by exercising. But this is simply not the case.

• Exercise cannot undo the damage of prolonged sitting — Rather, it’s the combination of bouts of exercise and chronic bodily motion (such as shifting posture while standing) that brings about the greatest health benefits.

• Being sedentary puts you at risk of early death (even if you exercise) — A 2015 study published in PLoS One found that, compared to those who exercised often and engaged in few sedentary behaviors, those who rarely exercised and spent many hours sitting had an almost eightfold increased risk of dying prematurely.9

• The detrimental effects of sitting outweigh the benefits of physical activity — Another systematic review that looked at 47 studies of sedentary behavior confirmed that the time a person spends sitting each day indeed produces detrimental effects that outweigh the benefits reaped from exercise.10

Exercise is one of the best preventive strategies against common chronic ailments, and while you can engage in different workout routines, there is one basic physical activity you can incorporate in your daily routine — walking. It’s free, easy to do and cannot be overdone (unlike high intensity training or strength training). For more information, read “Whether You Count Steps or Time Your Walk, What Matters Is Getting Outdoors.”

Sit Less to Protect Your Heart and Overall Health

If you’re worried about heart disease — especially if you know you have a family history or genetic risk for Type 2 diabetes or other chronic diseases — spending less time sitting down in front of the TV is one of the simplest ways to take control of your health.

Small, steady changes make a real difference, so here are practical, doable steps for you to adapt to your daily routine.

1. Limit TV to one hour or less daily — If you’ve been watching two or more hours each day, start cutting back. Keep your TV time under an hour, and if you use streaming services, set a timer to avoid the automatic next episode. If you love shows, watch them while walking slowly on a treadmill or doing gentle stretches.

In addition, screen time has been linked to sleep deprivation and behavior issues particularly in the youth. Read “Too Much Screen Time Linked to Sleep and Behavior Problems in Children” for more information.

2. Move every 30 minutes — Even if your job or lifestyle involves sitting, make an effort to break it up. Set a reminder to stand up and move around every half hour. Walk around your house, climb stairs, or step outside for fresh air. Invest in a standing desk or walking pad to help you stay active, even if you’re working.

Short bursts of activity help your circulation and prevent dangerous blood pooling in your legs. I do this myself and notice better energy and clearer focus throughout the day.

3. Swap screen time for light activity — If you find yourself scrolling or watching out of boredom, replace that time with simple activities. Do light chores, walk your dog, or even tidy up your space. These small movements help keep your metabolism active. If you’re a parent, involve your kids and make it a family habit. Your body will thank you for every bit of movement you add.

4. Improve your snacking habits — TV time often means grabbing chips, sugary drinks, or alcohol — all of which harm your heart. If you sit down to watch something, keep fresh fruit or a glass of water with lemon nearby instead. If you’re someone who struggles with nighttime cravings, sipping warm herbal tea helps curb the urge for junk food.

5. Incorporate walking into your lifestyle — Whenever you can, walk instead of driving or sitting. If you’re making a phone call, walk while you talk. Park further from the entrance when you run errands. If you have a dog, add an extra loop to your usual walk. Walking doesn’t require gym memberships or fancy equipment — it’s free, easy, and one of the most effective ways to lower your heart disease risk.

Frequently Asked Questions (FAQs) About TV Time and Heart Disease

Q: How does watching too much TV increase heart disease risk?

A: Spending hours in front of the TV slows your circulation, raises blood sugar, and encourages weight gain. When you sit for too long, blood flow becomes sluggish, and arteries become prone to plaque buildup. This increases your chance of heart attacks and strokes. Watching two or more hours daily raises your heart disease risk by 12%, even if you don’t have a family history of heart problems.

Q: If I have a family history of diabetes, does reducing TV time really help?

A: Yes, according to research published in the Journal of the American Heart Association. Even people with high genetic risk for Type 2 diabetes had a lower chance of developing heart disease when they limited television viewing to less than one hour per day. Their risk was 2.13%, compared to 2.46% in those with low genetic risk who watched two or more hours daily.

Q: How much does each extra hour of TV time affect my heart health?

A: Every additional hour of television viewing increases your risk of developing atherosclerotic cardiovascular disease by 3%. Over time, this builds up, leading to serious consequences for your heart and blood vessels. Reducing your daily TV time is one of the simplest changes you can make for better heart health.

Q: Why is sitting in front of the TV worse than other types of sitting?

A: Watching TV often goes hand-in-hand with unhealthy habits like snacking on junk food and sugary drinks. This combination spikes blood sugar and triglyceride levels, slowing glucose metabolism and causing damage to arteries. Unlike other forms of sitting, TV time tends to displace physical activity and keeps you completely still for long stretches.

Q: What simple steps can I take to lower my heart disease risk?

A: Cut your TV time to under one hour per day, move every 30 minutes, swap screen time for light activity, improve your snacking habits, and walk whenever possible. These small, steady actions protect your arteries, keep your metabolism active, and help your heart work the way it’s supposed to.

Why Standing May Be as Important as Exercise


Reproduced from original article:
https://articles.mercola.com/sites/articles/archive/2022/08/19/standing-benefits.aspx
The original Mercola article may not remain on the original site, but I will endeavor to keep it on this site as long as I deem it to be appropriate, and will not be bullied into removing it.


Analysis by Dr. Joseph Mercola     Fact Checked      August 19, 2022

benefits of standing desk

STORY AT-A-GLANCE

  • Sitting and other forms of prolonged, uninterrupted sedentary time promotes cardiometabolic disorders, obesity, depression and all-cause mortality in adults and in children are linked to obesity, anxiety and depressive symptoms
  • More than two dozen chronic diseases, from diabetes and high blood pressure to back pain and deep vein thrombosis, have been linked to excessive sitting
  • Children at standing desks burn 15% to 25% more calories during the school day than those who remain sitting; students were also less likely to report neck and shoulder discomfort when using standing desks
  • In the workplace, standing desks have also been found to trigger increased brain activity and do not hinder cognitive performance as has been suggested
  • If you want to take your fitness to the next level, make standing a workout of its own by standing on a wobble board at your standing desk

During the pandemic, the already largely sedentary American population moved even less, with daily steps plunging by an average of 20%.1 With more people working from home, the tendency to sit at a computer for long hours is taking a toll on both physical and mental health, but the upside is that many are increasingly realizing the important of daily movement.

While regular physical exercise is important, so, too, is doing virtually anything other than sitting — even standing. This is why many fitness trackers have goal settings for not only calories burned and steps taken in a day, but also reaching a standing-time goal.2

What Sitting Does to Your Body

Sitting is a behavior with a very low energy expenditure that’s associated with poor health outcomes in both adults in children. Sitting and other forms of prolonged, uninterrupted sedentary time promote cardiometabolic disorders, obesity, depression and all-cause mortality in adults and in children is linked to obesity, anxiety and depressive symptoms.3

Increased musculoskeletal symptoms are also associated with prolonged sitting,4 and being sedentary for long periods of time each day even appears to accelerate aging at the cellular level.

Among close to 1,500 older women included in one study, those who sat the longest were, on average, eight years older, biologically speaking, than women who moved around more often, with researchers concluding, “avoidance of a highly inactive lifestyle may provide health benefits at the cellular level.”5

Another study found that excessive sitting increases lung cancer risk by 54%, uterine cancer risk by 66% and colon cancer risk by 30%, with researchers noting:6

“Sedentary behavior contributes to an interrelated network of increased body fat, altered production of sex hormones, metabolic dysfunction, leptin, adiponectin and inflammation, encouraging cancer development.”

Separate research, published in the American Journal of Preventive Medicine, further found that sitting for more than three hours a day causes 3.8% of all-cause deaths in the 54 countries surveyed.7

Cutting your sitting time to less than three hours a day could increase your life expectancy by 0.2 years (about 2.4 months), the researchers concluded. More than 60% of people globally spend more than three hours a day sitting.8

Why You Should Break Free From ‘Chair Addiction’

“Chair addiction has become a hallmark of modernity,” according to Dr. James Levine, author of the book “Get Up!: Why Your Chair Is Killing You and What You Can Do About It,” and the inventor of the treadmill desk.9 “Sitting kills more people than smoking because more people sit excessively than smoke, and the health sequelae of sitting are more numerous,” he added.10

More than two dozen chronic diseases, from diabetes and high blood pressure to back pain and deep vein thrombosis, have been linked to excessive sitting, and fitting in an exercise session isn’t likely to offset excessive sitting’s harmful effects.11

It was during the Industrial Revolution, when people moved from agricultural communities to cities, that sedentary behaviors and many of their related health problems became common. Levine wrote in Mayo Clinic Proceedings:12

“Once the Industrial Revolution took hold, lethal sitting became inevitable. In the 1800s, factory production lines were invented to diminish the need for a worker to waste time walking. Soon after that, modern offices were developed with the premise that the fewer minutes workers moved during the workday, the less time was wasted.

The 1930s saw the rise of the archenemy — the office chair. Workplace automation and mechanization followed with the introduction of typewriters, Dictaphones, intercoms, and adding machines — all of which diminished movement. By the 1950s, mass-produced and affordable cars came onto the market and people forewent walking to work and drove.

Last came desk-based computerization and the conversion of active play to electronic play. It took nature 2 million years to design the walking, dynamic human, and it took those humans 200 years to reverse the art of nature and cram people all day long into chairs … The human genome has not substantially changed in 200 years, but over that time the humans’ default posture has changed from ambulatory to chair-based.”

Standing Benefits Mind and Body

One of the most obvious benefits of standing is that it increases energy expenditure, or calories burned, which can help to ward off obesity. Sitting increases metabolic rate by only 5% compared to lying down, but walking, even at a slow pace, increases energy expenditure 100%.13

According to Stand Up Kids, an organization whose mission is to bring a standing desk to every public school child within 10 years, children at standing desks burn 15% to 25% more calories during the school day than those who remain sitting — and the difference was even greater among children with obesity, who burned 25% to 35% more calories at standing desks.14

When standing desks were introduced to a fourth grade classroom at one school, standing time increased by 17 to 26 minutes per school day while sitting time decreased by 17 to 40 minutes.15 The students were also less likely to report neck and shoulder discomfort when using standing desks.

A study published in the Journal of Medicine and Sport also revealed that in first grade boys, lower levels of physical activity and higher levels of sitting time were linked to poorer reading skills.16

In the workplace, standing desks trigger increased brain activity and do not hinder cognitive performance as has been suggested.17 Other benefits of standing, reported by Stand Up Kids, include:18

  • Prevention of the body’s tissue adaptation to static positions, such as short hip flexors and hamstrings, rounded upper back and poor shoulder position
  • Prevention of orthopedic degradation and dysfunction, including back and neck pain, repetitive stress injuries, pelvic floor dysfunction and knee and hip disorders
  • Increased creativity and educational test scores
  • Increased engagement and active learning in the classroom

How to Gradually Break Free From Your Chair

Kelly and Juliet Starrett are the husband-and-wife team who founded Stand Up Kids. Kelly has a Ph.D. in physical therapy and is the author of “Deskbound: Standing Up to a Sitting World.” He is one of the leaders in the CrossFit movement and stresses the importance of proper body mechanics, both in and outside the gym.

His first book, “Becoming a Supple Leopard,” addresses biomechanical inadequacies that might increase your risk of injury. Juliet is a former competitive athlete, CrossFit authority and co-founder of the healthy movement website Mobility WOD. In 2016, I interviewed Kelly about his book, “Deskbound,” which helped me address some of my own movement challenges and is an eye-opening read about why standing is a simple way to radically improve your health.

If you’re not convinced, Kelly mentioned a study that found office workers who smoked to be healthier than nonsmokers simply because they got up every 30 minutes or so and walked outside to have a cigarette.19 “That activity was enough to be a considerable change in the function and health of the human being,” he said.

However, if you’re used to sitting for hours a day, be prepared for a gradual transition and avoid trying to switch to a standing desk “cold turkey.” The Starretts recommend first transitioning to a standing desk with a perching stool and sitting on that for 20 or 30 minutes, then gradually increasing your time.20

In addition, be sure your desk is adjusted to the proper height. Also, many people feel more comfortable having somewhere to put a foot on and off, such as a stepstool.

If you don’t have a standing desk, it’s possible to fashion one out of a regular desk by propping up your computer on a box or an overturned wastebasket. Or, if you have an island or breakfast bar in your kitchen, use that. If standing isn’t an option, you can reap many similar benefits by getting up from your chair every 20 minutes and taking a two-minute walk. For times when you do sit, “sit with skill,” the Starretts said.

They advise sitting on your sit bones, engaging your legs and trying to look over the chair. When you’re first starting out, divide your day into optional sitting and nonoptional sitting. Don’t worry about the times when you have to sit, but take stock of what they call “junk sitting” and try to whittle that down.

Try a Wobble Board While Standing

Standing is classified as a light-intensity activity when it’s “active” rather than “passive.”21 Active standing might include standing while doing dishes whereas passive standing is waiting in a line. If you want to take your fitness to the next level, make standing a workout of its own by standing on a wobble board at your standing desk.

This has added benefits for improving balance and posture while working your core muscles and boosting coordination. Beyond this, a transition to more active schools and offices, which promote not only standing but also more daily movement, could have far-reaching public health benefits, according to Levine.

“Offices can incentivize protocols for walking meetings, incentivize leg-based interactions (eg, walk across the office versus e-mail), and install walking tracks or treadmill desks. Active offices not only report improved health but less perceived stress and improved productivity.

Schools can be designed to promote active learning, and research demonstrates improvement to health, attentiveness, and educational outcomes. Bright, clean, attractive stairwells with visible prompts promote walking up steps better than do poorly lighted, dirty, dank ones.”22

The more you try to incorporate standing and movement into your day, gradually you’ll get used to the idea of standing and will find that you don’t automatically look for a chair the way you used to. You’ll be surprised by how many opportunities you have to move in a day if you start opening your eyes to them.

– Sources and References