Lifestyle

Dr Linda Calabresi
Clinical Articles iconClinical Articles

A decent eating program can keep you out of hospital, according to US research into the value of providing ready-to-consume meals to a select adult population.The retrospective cohort study involved just over 1000 participants, average age 53, almost 500 of whom were allocated to receive 10 meals a week, tailored to a recipient’s specific medical needs, for a period of just over two years. This group was then compared to a control group who had been matched for age and area of residence etc.Overall the study found the medically tailored meal delivery program was associated with approximately half the number of inpatient admissions over the duration of the study. Similarly, receiving the set meals was associated with significantly fewer admissions to skilled nursing facilities and a substantial reduction in health care costs.A pretty impressive result, yes? But before we go demanding an MBS item number for Meals on Wheels, even the researchers themselves advise caution in interpreting these results. Firstly, the study was not randomised. People who were allocated to receive the meal delivery intervention were generally more ill than the control patients – they were significantly more likely to have HIV, cancer and diabetes.“It is unlikely that similar results would be seen were the intervention applied to a healthier population, as the risk of admission or high health care costs, even in the absence of intervention would be substantially lower,” the study authors said in The Journal of the American Medical Association (JAMA) Internal Medicine. And we don’t know whether it was the actual healthy food that made the difference, or whether it was the fact that they were getting their food for free thereby enabling the recipients to have more money for other things such as medications (remembering we are talking about the US health system here).Nonetheless, the study raises some valuable points.It is well-recognised that ‘following an appropriate diet is a cornerstone of maintaining health and managing illness.’ But this is often difficult for patients with complex medical conditions, especially if they are socioeconomically disadvantaged.As an accompanying editorial points out, much of the more recent focus has been on diet-related diseases and the health and economic burden they increasingly represent. Diseases such as diabetes, cardiovascular disease and obesity-related cancers have claimed much of the spotlight.But nutrition as a solution, and how we can use specific nutritional interventions to effectively manage a patient’s health care has been less well defined.“One obstacle has been demonstrating the efficacy and cost implications of specific nutritional interventions,” the editorial authors said.This JAMA study does that. Specifically, the researchers have shown that the provision of free, medically tailored meals at home is associated with reduced health care use and net cost savings.More importantly for Australians, the study supports the incorporation of nutrition into health care to improve patient health outcomes and keep vulnerable patients out of tertiary care.“Given their potential for significant health benefits and cost-savings, [medically tailored meals] may represent the tip of the spear for a national evolution toward such food-is-medicine approaches,” the editorial concludes.

Reference

Berkowitz SA, Terranova J, Randall L, Cranston K, Waters DB, Hsu J. Association Between Receipt of a Medically Tailored Meal Program and Health Care Use. JAMA Intern Med. Published online April 22, 2019. doi:10.1001/jamainternmed.2019.0198Mozaffarian D, Mande J, Micha R. Food Is Medicine—The Promise and Challenges of Integrating Food and Nutrition Into Health Care. JAMA Intern Med. Published online April 22, 2019. doi:10.1001/jamainternmed.2019.0184
Emmanuel Stamatakis
Clinical Articles iconClinical Articles

As little as 20 minutes of exercise a day can offset a sedentary lifestyle. And that exercise can include walking the dog.People who spend much of their day sitting may need to move around less than we thought to counteract their sedentary lifestyle, new research shows.Our research, published today in the Journal of the American College of Cardiology, found about 20-40 minutes of physical activity a day seems to eliminate most health risks associated with sitting.That’s substantially lower than the one hour a day a previous study has found.We spend almost all our waking day sitting, standing, or moving. The health impact of each one of these can be complex.For example, too much standing can lead to lower back problems and even a higher risk of heart disease. But sitting for too long and not moving enough can harm our health.Then there are people who sit for many hours and also get in reasonable amounts of physical activity. For example, someone who has an office job but walks to and from work for 20 minutes each way and runs two to three times a week easily meets the recommended level of physical activity.While we know moving is better than sitting, what is far less clear is how much of a good thing (moving) can offset the harms of a bad thing (sitting).That’s what we wanted to find out in our study of almost 150,000 Australian middle-aged and older adults.We followed people enrolled in the 45 and Up Study for nearly nine years. We looked at links between sitting and physical activity with deaths from any cause, and deaths from cardiovascular disease such as heart disease and stroke, over that time. We then estimated what level of moderate-to-vigorous physical activity might offset the health risks of sitting.This kind of activity is strenuous enough to get you at least slightly out of breath if sustained for a few minutes. It includes brisk walking, cycling, playing sports or running.

What we found

People who did no physical activity and sat for more than eight hours a day had more than twice (107%) the risk of dying from cardiovascular disease compared to people who did at least one hour of physical activity and sat less than four hours a day (the “optimal group”).But it wasn’t enough just to sit less. People who did less than 150 minutes of physical activity a week and sat less than four hours a day still had a 44-60% higher risk of dying from cardiovascular disease than the optimal group.We also calculated the effect of replacing one hour of sitting with standing, walking, and moderate and vigorous physical activity.Among people who sit a lot (more than six hours a day) replacing one hour of sitting with equal amounts of moderate physical activity like strenuous gardening and housework, but not standing, was associated with a 20% reduction in dying from cardiovascular disease.Replacing one hour of sitting with one hour of vigorous activity such as swimming, aerobics and tennis, the benefits were much greater, with a 64% reduction in the risk of dying from cardiovascular disease.

What does it all mean?

The great news for people who sit a lot, including sedentary office workers, is that the amount of physical activity needed to offset the health risks of sitting risks was substantially lower than the one hour a day a previous study found.Even around 20-40 minutes of physical activity a day - the equivalent of meeting the physical activity guidelines of 150 to 300 minutes a week – seemed to eliminate most risks associated with sitting.For people who sat a lot, replacing sitting with vigorous physical activity was better than replacing it with moderate activity; and replacing sitting with moderate activity or walking was better than replacing it with standing.

What’s the take-home message?

Our study supports the idea that sitting and exercise are two sides of the same health “coin”. In other words, enough physical activity can offset the health risks of sitting.Should we worry about sitting too much? Yes, because sitting takes up valuable time we could spend moving. So too much sitting is an important part of the physical inactivity problem.We also know only a minority of adults get enough physical activity to offset the risks of sitting.For those who sit a lot, finding ways to reduce sitting would be a good start but it is not enough. The most important lifestyle change would be to look for or create opportunities to include physical activity into our daily routine whenever possible.

How to widen our activity ‘menu’

Not everyone has a supportive environment and the capacity to create opportunities to be active. For example, lack of time and physical activity being low on people’s list of priorities are the main reasons why inactive adults don’t exercise. Also, many do not have the motivation to power through a strenuous workout when they are juggling many other life challenges.There are no known remedies to a lack of time or low motivation. So, perhaps we need to add new approaches, beyond exercising and playing sport for leisure, to the “menu” of physical activity options.Incidental physical activity like active transportation – think walking fast or cycling part or all of the way to work – or taking stairs are great ways to become or stay active without taking much extra time.The ConversationEmmanuel Stamatakis, Professor of Physical Activity, Lifestyle, and Population Health, University of Sydney; Joanne Gale, Research Fellow Biostatistician, University of Sydney, and Melody Ding, Senior Research Fellow of Public Health, University of SydneyThis article is republished from The Conversation under a Creative Commons license. Read the original article.