Showing posts with label physical activity. Show all posts
Showing posts with label physical activity. Show all posts

Confronting the challenges of 2012 with salads and stairs

In Sunday's New York Times, the editors ask prominent economists to weigh in on how to face the economic challenges ahead of us in 2012.  Richard Thaler, of the University of Chicago, who wrote (with Cass Sunstein) Nudge, the best selling book on behavioral economics argues that employers have the opportunity to tackle one of our biggest challenges, health care spending.  Employers are choice architects - they can make changes in how choices are offered that make one choice easier, or the default.  Thaler argues that by making a few changes, employers can improve workers' health, leading to greater productivity, fewer sick days, and lower insurance costs.


First, Thaler argues, make eating at work easier, by prominently featuring a variety of healthy options and putting in an attractive salad bar before the burger line.  How might this look in real life? Let me use the cafeteria at my office as an example.  

There are at least four cafeterias on our hospital/medical school campus and they aren't all run by the same people, so the situation likely looks different on the other side of campus, but this is what it looks like in the cafeteria that sits right under my office and nearest the cancer center.  The first thing you see when you walk in, is the grill/fry-o-later area.  Serving up burgers, hot dogs, fries and onion rings, it invariably has a long line, which makes it easy to miss that there is a sandwich counter immediately to your left.  The sandwich counter is hidden behind a high wall and camouflaged further by shelves of chips and candy, so unlike in many sandwich shops, you can't see the choices.  You can see two featured sandwiches.  Sometimes one is healthy, but not always.  Just past the sandwiches (and around the candy display) is the hot meal counter, which features one Weight Watchers entree each day.  This may reflect my own food preferences, but I rarely find this entree to look very appetizing or particularly healthy (I realize “healthy” can have lots of different meanings, but something high in cheese and refined grains rarely meets my metric).  To the far right of the sandwich bar is the pizza station, which usually features 3-5 types of pizza (most laden with meat) and another cheesy doughy option, like calzone, daily. Across from the sandwich bar is the featured entree special of the day.  The days I've visited in recent memory this has been: nachos loaded with ground beef and processed cheese of the orange variety ( which I confess to finding appealing on Super Bowl Sunday, but I'm not kidding myself about it fitting in the healthy realm and I accept the health consequences of my choice), and beef stir fry laden with sauce of the kind women's magazines regularly tell readers to avoid choosing when dining out, roast beef covered with gravy and accompanied by mashed potatoes. Just past the featured entree is the salad bar. I think most cafeterias these days have a salad bar, but having a salad bar and having an “attractive” salad bar are not the same thing. To their credit, since I started at my office nearly 5 years ago, the cafeteria has added mixed greens and baby spinach as daily options, offering something other than the white-ish iceberg lettuce of the early days. And there are proteins in the salad bar choices - typically hardboiled eggs, one type of canned bean and diced turkey or tuna. But the salad bar is a long way from what I’ve seen else where and a long way from allowing you to create the kind of salad you might get down the street at one of the neighborhood sandwich shops. Dried fruit? Nope. Other kinds of fruit? It is on the other side and is charged at a different rate. Nuts? No, but there are sunflower seeds. Cheese? Yes, there is usually grated orange cheese. I give the cafeteria credit, I can definitely create a greek salad for myself that rivals that fancy sandwich shop on the corner (with the possible exception of the tomatoes that always look a bit iffy) at a fraction of the cost. But it doesn’t look “attractive” and I’ve got to do all the work, which perhaps explains why there is never a line at the salad bar and I am 10 times more likely to see the people in front of and behind me at the checkout with fried chicken than a salad. This, I think, gets to the fundamental point - if you want people to make the healthy choice you have to make it easy and attractive.

What about Thaler’s other suggestions? His second is making exercise easier. The health benefits of exercise, as we have said many times on CNiC, don’t require marathon duration or rigor. Walking is enough. And many employers subsidize gym memberships or arrange discounts, including mine. But you shouldn’t have to leave work to get a little walk in - making stairwells attractive is one way and the suggestion Thaler focuses on. In our conglomerate of old and new buildings, my workplace has lots of unattractive stairwells that are often hard to find. At a previous job, I had the privilege of sitting on a committee that was thinking about how to design a new hospital building and one of the most compelling ideas I heard was to make the stairwells front and center - highly visible and the easiest choice (instead of pushed off into the corner and behind a heavy metal door). One of our newest buildings on campus, which also serves as the home to our outpatient cancer care, has a lovely open stairwell at one end of the building, easily visible from the entrance. I enjoy seeing staff using the stairs and leaving the elevators to our patients, many of whom aren’t well enough to climb the stairs to the upper floors of the building. As we embark on a series of renovations and construction of new facilities as part of the 10 year plan, I look forward to seeing how our leadership makes stair use an easy option. In addition, our campus has launched a series of paths around the area (affectionately called “Tread the Med”) to allow staff and visitors to take walking breaks or have walking meetings (as Thaler plans to do in 2012). We have often used these exact “paths” around campus for our walking interventions during inclement weather and they are a great resource. I applaud the leaders who thought to leverage the bridges and hallways that link our conglomerate of old buildings as a means to promoting activity! Combined with easily located, accessible and attractive stairways, our step counts on campus should continue to rise.

Since most Americans spend more waking hours at work than at home, the role of our employers and workplaces at making healthy choices easy (or at least easier) can’t be underestimated. As part of our new TREC @ WUSTL center, our colleagues are examining just this - workplace policies that impact obesity, diet and physical activity.

Rest NOT Best

Following closely on the heels of the American College of Sports Medicine Exercise Guidelines for Cancer Survivors, MacMillan Cancer Support in the UK this week is launching a Move More campaign designed to get cancer survivors up and moving and debunk the notion that rest is best for cancer survivors during and after treatment. As part of that MacMillan reviewed the evidence supporting a role for exercise in survivors. Expanding on the ACSM focus on clinical trials, the MacMillan report includes observational data – notably that showing that exercise reduces risk of recurrence and death in breast, colorectal and prostate cancer survivors. The MacMillan website holds a wealth of information, directed at survivors, on how to go about safely being active.



The benefits of activity, what we mean by activity, how to safely be active and how to get started are all covered in great detail.



Dr. Robert Thomas, a medical oncologist, sums it all up nicely in this video.



For other ways to stay healthy after a cancer diagnosis, check our our Cancer Survivors' 8 Ways. For more on how exercise can help prevent cancer, click over to the video from our 8 ways campaign.

Physical activity prevents colon cancer


In a detailed review of evidence from 20 studies one of us, Kathleen Wolin, reports that higher levels of physical activity protect against colon cancer (see study) and now the precursor lesions, colon polyps (see study) . The evidence is consistent across study design, approaches to assessment of physical activity, and the populations studied.  Key features of this extensive review include the thorough search of the literature and use of state of the art statistical approaches to combine the evidence on activity and colon cancer risk.

By evaluating both colon polyps, the precursor lesion from which the majority if colon cancers develop, as well as colon cancer, Wolin is able to show that sustaining activity over the lifetime will lead to the greatest reduction in colon cancer. The parallel evidence from our previous work estimating the overall benefit of activity against colon cancer,  sustained activity at the level of one hour of walking per day from age 30 to age 70 will reduce colon cancer by half compared to those who do not exercise at all (see table of results). This significant 50 percent reduction in new cases of colon cancer is a benefit that most of us can achieve. In addition, exercise reduces risk of heart disease and diabetes as well as other major chronic conditions. 

Colon cancer is largely preventable. In addition to a healthy diet, maintaining a healthy weight and being physically active, screening significantly reduces the risk of both the diagnosis of colon cancer and death from colon cancer. See our related post, 

New Results Further Confirm that Screening Prevents Death from Colon Cancer



New Maps, Same Problem: Inactivity

It's no real surprise.  Not only are most of us not getting enough exercise to meet health guidelines, a large chunk of us aren't getting any physical activity at all.  New data from the Centers for Disease Control and Prevention (CDC) show that 25 percent of adults spend none of their free time exercising or doing any other type of physical activity.

This rate, though, can vary greatly from region to region, and even county by county.  The latest report shows that some counties had inactivity rates as low as 10 percent, while others had rates as high as four times that.

As the map below shows (Figure 1), states with the highest rates of inactivity were largely in the south, while states on the west and east coasts had generally lower rates.  Not likely by coincidence, this clustering of inactivity tracks very closely with poverty rates (Figure 2) and highlights the multi-layered issues that come into play when it comes to health and disease.

Figure 1 - Physical Inactivity
Figure 2 - Poverty
Poverty, education, income, health care access, and quality of infrastructure (like sidewalks and bike paths) all play an important role in the healthy choices we make.  Yes, it all comes down to a personal choice - choosing to get out the door for a walk or sit on the couch and watch TV - but the healthy choice is always easier to make when the people, places, and policies that surround us support that choice.

Canada needs to get moving, physical activity report shows


A new report released by Statistics Canada yesterday shows that the level of physical activity in the Canadian population is far lower than previously estimated (see report).

While Canada has used self-report to monitor the level of activity in the adult population and seen high levels of reported physical activity – in the new report barely one third of the population reached the target of 10,000 steps per day measured by pedometer. Many of us use a pedometer to monitor our daily level of activity – in this setting it was one of the measures to more directly assess the activity in the population.

Overall these data suggests that Canadians are not as active as national targets recommend for health benefits. Many benefits accrue from higher activity, including weight control, lower risk of heart disease, diabetes, and cancers of the breast and colon, to name a few.

With the New Year upon us, increasing our daily activity to achieve at least 10,000 steps per day gets us towards achieving some of these health benefits. It is never too late to begin being more active. As we have written previously, we have many tips to help you move towards these goals.

Related CNiC posts

How are those New Years' Resolutions?

If you needed another reason to lace up your sneakers and keep your New Years' resolution to be active, this week offered 2:

1) Our team published, in collaboration with colleagues at the American Cancer Society, research on the role of physical activity in colon cancer and colon cancer mortality. There is a strong and consistent body of evidence showing physical activity reduces colon cancer risk. This new study examined whether the consistency of physical activity matters.

We often get this question at CNiC - can I start now? Is it too late? What we found is that consistent physical activity does matter for colon cancer mortality. Does this mean if you haven't been active before now it is too late and you shouldn't bother starting? Absolutely not. It is important to look at this study in the context of the previous work and see the big picture -- physical activity matters for colon cancer risk and mortality. Starting earlier seems to be better, but it doesn't appear it is ever too late to start either.

And of course, the other thing to remember is that physical activity isn't just beneficial for colon cancer - it reduces risk of other cancers AND heart disease AND stroke AND diabetes AND osteoporosis. And physical activity improves the quality of life as well - you FEEL better.

2) Providing another reason to be active - colleagues of ours published a report on the benefit of physical activity after a prostate cancer diagnosis. Among men diagnosed with non-metastatic prostate cancer, those who were physically active after diagnosis were less likely to die and less likely to die of prostate cancer. Overall mortality risk was reduced with activity equivalent to 30 minutes a day of brisk walking. The study suggested more vigorous physical activity may be necessary to reduce risk of prostate cancer specific death.

When the days are short and the temperatures cold, it can be hard to find the motivation to be physically active, even for our team. As we've said before - anything that gets you up and moving is good - even short breaks. And if you think you don't have time, remember our tips. Physical activity is a place where you get enormous "bang for your buck!"

Even small breaks are good

A study out this month in the journal Cancer, Epidemiology, Biomarkers & Prevention reviewed the literature on sedentary behavior and cancer. Ten of the 18 studies included in the review found a significant positive association between sedentary behavior and cancer risk - specifically cancers of the colorectum, endometrium, ovaries and prostate. Sedentary behavior isn't just a lack of physical activity - it is prolonged sitting or reclining. Someone can meet the physical activity guidelines of 30 minutes of moderate intensity physical activity each day (e.g., a brisk 30 minute walk) and still be quite sedentary if s/he spends the rest of the day sitting.

This is why more and more public health advocates are touting the value of lifestyle activity - the movement associated with daily living. And some, like Dr. Toni Yancey, are taking it a step further and advocating we build purposeful movement focused breaks into our workplaces. In today's Personal Health column, Jane Brody highlights Dr. Yancey's efforts and her new book "Instant Recess". In her book, Dr. Yancey suggests building two 10-minute breaks of a fun group activity into the work day. These kind of programs have proven successful in the business world at improving the health of employees and at improving productivity. Similar programs in schools have been shown to improve learning.

The value of these recess/activity breaks at reducing cancer risk has yet to be shown, but with so many other positive outcomes - most notably feeling better, they seem like a great idea and one CNiC can definitely get behind!

Reduce risk of breast cancer through action today

Breast cancer prevention means taking action now. We talked about awareness earlier this week and have discussed drug strategies to reduce risk of breast cancer in high risk or postmenopausal women. But for every woman there are things to do now to lower risk.


  1. be active - increase your level of physical activity
  2. maintain a healthy weight
  3. cut down on the amount of alcohol you drink
Our web tools help you look at your risk compared to other women your age. We also provide some helpful background information. Above all, the message is clear that we can modify risk of breast and other cancers through changing the way we live. Sustained changes can dramatically reduce risk. Weight loss after menopause can halve the risk of breast cancer, for example. It is never too late to increase activity and maintain some weight loss. we describe strategies for increasing physical activity and weight loss in an earlier post.

Do competitions help you get healthy?

This week marks one of my favorite times of the year - the US Open. The New York Times had a couple of articles this week that got me thinking about how competition can fuel (or harm) health. The first was a great photojournalism article in the Sunday Magazine about how much harder the women are hitting than in years past. I love seeing a discussion about how increasing strength is pushing women to do more. Strength training has lots of benefits and we're seeing more and more discussion of them (the Times also covered the role of strength training in aging-related muscle loss). The need to keep or get a competitive edge is pushing women to start strength training at younger ages -- I remember this being a really novel part of our pre-season soccer training when I played in high school (aka, the old days). However, we didn't get any instruction on proper form or how to progress safety and not injure our growing bodies. It is nice to see so many programs now for youth addressing these issues.

The other article is about a "friendly" wager (of $10,000!) between Andy Roddick and Justin Gimelstob as to whether Gimelstob can complete the New York City Marathon this November. Gimelstob's motivation isn't health - it is competition with Roddick - who isn't even running! Lots of sites that offer tips for getting healthy and starting (or maintaining) exercise programs suggest friendly competitions or reward systems to keep you motivated. Gimelstob and Roddick have pushed it a bit beyond this, with friends and family worrying that Gimelstob has progressed to a significant risk of injuring himself. It got me thinking about whether friendly wagers and competitions can help or do they push us past where we should go in our pursuit of health?

What do you think? Do you use rewards or competition to motivate yourself to get active?

Is obesity genetic?

While lifestyle contributes substantially more to risk of cancer (and other chronic diseases) than genetics alone, the interplay between genetics and lifestyle is a subject of increasing interest. That's what makes a new study out of the UK, published in PLoS Medicine so exciting.

The researchers took 12 genetic mutations that had previously been found to be associated with obesity risk and examined how they combined to be associated with risk of weight gain. The presence of each additional mutation increased risk of weight gain -- the more mutations, the greater the risk. The mutations significantly increased the risk of obesity by 16%. The researchers then did something quite novel, using the data the participants reported about how physically active (or not) they were, the researchers re-examined the associations. In the inactive men and women, the association was stronger than in the inactive people. What this means is that the effect of genes were stronger in the people who were inactive - or - that physical activity "erased" some of the genetic predisposition - about 40% of it.

What does this mean for those of us who have no idea how "genetically predisposed" we might be to obesity? Physical activity has benefits for everyone, but for individuals who are genetically predisposed to obesity, physical activity is especially important. It also means that a genetic predisposition to obesity isn't cause for "doom and gloom" - there ARE things you can do to counter it - notably, being physically active!

Just Sitting Around Really IS That Bad

Results from an exciting new analysis were released today and highlight the important advances that are being made in understanding how energy expenditure relates to cancer. The results, from the American Cancer Society’s Cancer Prevention Study show that individuals who report more time spent sitting (6 hours/day or more) have a higher risk of mortality than those who report little sitting (less than 3 hours/day). Importantly, this effect is independent of the amount of time the individuals reported engaging in physical activity. As we've previously reported, physical activity also predicts obesity, chronic diseases and mortality.

I spent last week at an exciting workshop at NIH addressing how we measure physical activity and sedentary behaviors. While objective devices like pedometers and accelerometers help us get information on certain physical activities and can help estimate energy expenditure, they don’t tell us about the context or type of behaviors. This is really important when thinking about sedentary behaviors, which are increasingly being shown to have an important role in obesity and chronic disease. Some sedentary behaviors are modifiable, such as TV watching. While others, like time spent driving to work, may be largely unchangeable. Great work is being done in the US, UK, and Australia to improve our understanding of how people spend their sedentary time so that interventions can better target behavior change and measure effectiveness of interventions.

To understand the ACS results a bit better, think about a couple examples. Most of us on the CNiC team spends our days sitting at a desk, writing papers, and analyzing data. We all try to get at least 30 minutes of moderate intensity activity a day, but if we spent more of the day moving about, we’d be better off. In fact, standing during some of those long meetings we have burns more calories and may help improve health. In contrast, plenty of people are on their feet all day (which brings back bad memories of my days in the retail and service sectors, which left me exhausted!), but may never be active enough at a pace to increase their heart rate enough to qualify as “moderate intensity” activity. As a result, in many research studies, these people would be considered “sedentary”. What today’s study from Alpa Patel and colleagues suggests is that these busy-on-their-feet people, even though they may not meet the physical activity guidelines, are doing better than those folks who are in an office and don’t get any physical activity. Of course, that doesn’t mean those who are busy on their feet couldn’t do better by adding in some moderate intensity activity each day!

The current recommendations are to get at least 30 minutes of activity of at least moderate intensity each day. This means walking, gardening, dancing, cycling, or easy running - really, anything you enjoy that gets you moving and your heart rate up. For an extra, and increasingly important, boost, do something each day that cuts down on the amount of time sitting.  Stand at a counter and work on your computer for a while; choose to stand on the bus rather than sit; or take the occasional stand-and-stretch break at school, home, or work.  They may all seem like little things but add them all up, and they can have an important impact on your health.