In "Effect of Prolonged Sitting and Breaks in Sitting Time on Endothelial Function," forthcoming in Medicine & Science in Sports & Exercise, researchers from IU Bloomington report on a study that holds out hope for anyone worried about the health effects of prolonged sitting.
If you've heard that Sitting is Killing You, you probably have some low-grade continuous anxiety about the fact that you still end up sitting at a computer for most of the day, most days. But a five minute/hour slow walking break was shown to guard against the worst circulatory effects of sitting.
The study involved 11 non-obese, healthy men between the ages of 20 and 35 who participated in two randomized trials. In one trial they sat for three hours without moving their legs. Researchers used a blood pressure cuff and ultrasound technology to measure the functionality of the femoral artery at baseline and again at the one-, two- and three-hour mark.
In the second trial, the men sat during a three-hour period but also walked on a treadmill for five minutes at a speed of 2 mph at the 30-minute mark, 1.5-hour mark and 2.5-hour mark. Researchers measured the functionality of the femoral artery at the same intervals as in the other trial.
(Image: …and go (cc), Martin Fisch, CC-BY-SA)