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To reduce the harmful health effects of sitting, take a five-minute light walk every half-hour. That's the key finding of a new study that my colleagues and I published in the journal Medicine & Science in Sports & Exercise.
We asked 11 healthy middle-aged and older adults to sit in our lab for eight hours – representing a standard workday – over the course of five separate days. On one of those days, participants sat for the entire eight hours with only short breaks to use the bathroom. On the other days, we tested a number of different strategies to break up a person's sitting with light walking. For example, on one day, participants walked for one minute every half-hour. On another day, they walked for five minutes every hour....