Slashdot Mirror
Sit Longer, Die Sooner
mcgrew writes "Bad news for most of us here — The Chicago Tribune is reporting that even if you get plenty of exercize, sitting down all day reduces your lifespan. From the article: 'Even after adjusting for body mass index (BMI) and smoking, the researchers found that women who sit more than 6 hours a day were 37 percent more likely to die than those who sit less than 3 hours; for men, long-sitters were 17 percent more likely to die.
People who exercise regularly had a lower risk, but still significant, risk of dying. Those who sat a lot and moved less than three and a half hours per day are the most likely to die early: researchers found a 94 percent increased risk for women and 48 percent increase for men, they announced recently in the American Journal of Epidemiology.'"
I've done it, works well. I spent ages looking for a solution and they're all crap, or crazy prices. In the end I used a few lengths of 2x4 to make an H with the tops shorter than the bottom. The cross member sits tall with the side bars flat. It slots in behind the main tread panel and allows a laptop to sit on the prongs pointing forward with the cross bar pushing against the rear of the panel. Not all treads have the support bar below the panel, so you may need to create a stand of some kind.
Tips: Running and walking at pace is not going to work. You're bouncing around and typing is a real PITA. If you want to burn calories, put it on a steep incline. Have a hand towel to hand, you'll sweat a lot and you don't want that dribbling onto your laptop. Have a water bottle or two to hand too, you'll need it.
You'll be able to do 3 hour sessions without really knowing it once you get the hang of movement and keyboard work. I had to forget doing paperwork, or using pen, making notes etc, it simply didn't work for me. But pure coding, if you know what you're doing, is a breeze.
The hardest part is forcing yourself to do it. It's far easier to slough in a chair behind a couple of huge monitors.
The participants were drawn from a mortality study by the ACS begun in 1992. The objective of the 1992 study (184,190 participants) was to investigate the relation between diet and mortality across the population (details in The American Cancer Society Cancer Prevention Study II Nutrition Cohort) From the section on "Materials and Methods" in the present paper we see that they didn't leave out non-obese people:
We excluded sequentially from this analysis men and women who reported a personal history of cancer (n = 21,785), heart attack (n = 11,560), stroke (n = 2,513), or emphysema/other lung disease (n = 9,321) at the time of enrollment. We also excluded individuals with missing data on physical activity (n = 4,240), missing sitting time (n = 2,954), missing or extreme (top and bottom 0.1%) values of body mass index (n = 2,121), or missing smoking status (n = 1,347) at baseline. Finally, to reduce the possibility of undiagnosed serious illness at baseline that would preclude or interfere with physical activity, we excluded individuals who reported both no daily life activities and no light housekeeping (n = 4,730), as well as those who died from any cause within the first year of follow-up (n = 403). After exclusions, the analytical cohort consisted of 123,216 individuals (53,440 men and 69,776 women) with a mean age of 63.6 (standard deviation, 6.0) years in men and 61.9 (standard deviation, 6.5) years in women when enrolled in the study in 1992.
They did record BMIs and what they found was the following:
We examined the association between time spent sitting and total mortality in men and women combined, stratified by body mass index (Table 3). Although time spent sitting and physical activity were more strongly associated with mortality among lean persons (for time spent sitting, P_interaction = 0.06; for physical activity, P_interaction = 0.002), both measures were significantly associated with risk of total mortality regardless of body mass index.