Many of us have smartwatches or fitness apps on our phones that count the number of steps we do. Usually, we aim to reach at least 10,000 steps a day, which we are often reminded is the target to help improve our health. This target is an arbitrary number that seems to have come from a Japanese marketing campaign for a pedometer. However, it is now included in daily activity targets by popular smartwatches, such as Fitbit.
When trying to get more active, it can often be demoralizing when you look at your step count and realize you haven't reached that goal of 10,000 steps. In fact, it can even be demotivating, especially in times where many of us are still working from home and only manage to walk from our makeshift offices to the kitchen to get our (usually) unhealthy snacks.
The good news for everyone is that the evidence is building to suggest that accomplishing less than 10,000 steps is still good for your health. The most recent large study, led by the University of Massachusetts, followed more than 2,000 middle-aged adults from different ethnic backgrounds over a period of 11 years. The researchers found that those taking at least 7,000 steps a day had a 50 to 70 percent lower risk of dying during the study period compared with those taking fewer than 7,000 steps a day.
Another interesting finding from the study was that the risk of dying was not associated with the step intensity. If two people did the same number of steps, the person doing them at a low intensity had no greater risk of dying compared with the person doing them at moderate intensity.
With all research, we have to consider the design of the study and determine the limitations of the research to ensure we draw accurate conclusions. The study led by the University of Massachusetts collected data over a period of about 11 years. However, the step count was only measured once, over a three-day period, during 2005 and 2006. Mortality and other health measures were followed up in August 2018.
The step count was not monitored throughout the study period, as it would be too onerous for the participants. Therefore, there was a large assumption that people's daily step count did not change throughout the study period. But how much people can walk can change for various reasons, such as having young children, commute time to work, injury and many other reasons, so it's difficult to draw too many conclusions from this type of data.