A few years ago, athletic shoe companies began to cash in on a study or two suggesting that running in shoes was dangerous, guaranteed to ruin your joints and your life, make you less attractive and confident, etc. (at least, that’s how it was translated to press coverage). The only viable answer, vested marketing implied, was to buy a new pair of shoes with less shoe in them.
Despite the obvious irony, consumers flocked in droves to purchase sweet new kicks and rectify their embarrassing running habits. Much like any other fitness craze, popular active-lifestyle magazines ran articles about the trend spinning a small amount of scientific research into definitive conclusions right next to advertisements for the shoes themselves. Fast forward to 2014 wherein the makers of arguably the most notorious shoes in the minimalist sector, the Vibram Five Fingers line, have moved to settle a lawsuit alleging the claimed health benefits of the shoes were not based on evidence. The market frenzy for minimalist footwear appears to have sharply abated. There are even blatant examples of market backlash in the introduction of what could be described as “marshmallow shoes,” such as the Hakko, with even more padding than runners were used to before the barefoot revolution.
An eerily similar phenomenon has appeared, i.e. market capitalisation on nascent scientific evidence, in the latest demon threatening our health: sitting. At the bottom of the orogenic marketplace for accessories designed to get workers a bit less semi-recumbent in the workplace. This market was virtually non-existent only a few years ago, yet now is substantial enough to have spawned an entire genre of internet article.
There is even a new term gaining traction for the condition: “sitting disease.” I sure hope it’s not catching. For now at least the term seems to remain quarantined in quotation marks most places it is used.
Many of the underlying articles in science journals are what is euphemistically referred to as survey science. Long generational time, lack of uniform cultivation standards and potential ethical considerations make Homo sapiens a rather poor model organism. Even if survey data were considered reliable (a dubious assumption), this only reveals associations. Even accelerometer studies, like those at the Mayo Clinic, only measure activity for a few weeks. The results can’t tell you that sitting alone causes obesity. An equally fair hypothesis would be that obesity increase the likelihood to stay sitting, but that’s just called inertia.
Although the studies and their press coverage motivate a burgeoning marketplace for NEAT accessories they don’t actually tell us much in the way of new information. A sedentary lifestyle is unhealthy. Attempts to increase the amount of low-intensity activity throughout the day, such as using a walking desk, are likely to motivate appetite. Without considering diet (and downplaying the importance of exercise), a standing desk, sitting ball, or occasional walking meeting is not likely to have tremendous health benefits when taken alone. And despite the rhetoric, maintaining a smoking habit to break up your sit-time with walks to the outdoors is probably not an equivalent trade-off. Presenting health management in such an unbalanced, single-variable way seems more motivated by trendiness for some, revenue for others, and both for the press. It is not that sitting is actually good for you, it’s just myopic to focus solely on that one health factor. As part of a a sedentary lifestyle gestalt, yes, it does play a role in promoting ill-health. Then again, if you think about it, you probably already knew that before it was cool.
Avoid sensationalist science journalism, consider the sources:
Ford, E.S., and Caspersen, C.J. (2012). Sedentary behaviour and cardiovascular disease: a review of prospective studies. Int J Epidemiol 41, 1338–1353.
Hamilton, M.T., Hamilton, D.G., and Zderic, T.W. (2007). Role of low energy expenditure and sitting in obesity, metabolic syndrome, type 2 diabetes, and cardiovascular disease. Diabetes 56, 2655–2667.
Katzmarzyk, P.T., Church, T.S., Craig, C.L., and Bouchard, C. (2009). Sitting time and mortality from all causes, cardiovascular disease, and cancer. Med Sci Sports Exerc 41, 998–1005.
Rosenkranz, R.R., Duncan, M.J., Rosenkranz, S.K., and Kolt, G.S. (2013). Active lifestyles related to excellent self-rated health and quality of life: cross sectional findings from 194,545 participants in The 45 and Up Study. BMC Public Health 13, 1071.
Rovniak, L.S., Denlinger, L., Duveneck, E., Sciamanna, C.N., Kong, L., Freivalds, A., and Ray, C.A. (2014). Feasibility of using a compact elliptical device to increase energy expenditure during sedentary activities. Journal of Science and Medicine in Sport 17, 376–380.
Schmid, D., and Leitzmann, M.F. (2014). Television Viewing and Time Spent Sedentary in Relation to Cancer Risk: A Meta-analysis. JNCI J Natl Cancer Inst 106, dju098.
Young, D.R., Reynolds, K., Sidell, M., Brar, S., Ghai, N.R., Sternfeld, B., Jacobsen, S.J., Slezak, J.M., Caan, B., and Quinn, V.P. (2014). Effects of Physical Activity and Sedentary Time on the Risk of Heart Failure. Circ Heart Fail 7, 21–27.