Subsequent research backed up the theory that increasing activity levels to 10,000 steps per day has health benefits, but most sedentary people would see improved health after getting more active, regardless of the activity. It's not the number that bestows health on you.
Fitness trackers don't help people lose weight
OK, sure, the number of steps you walk doesn't matter so much, but achieving 10,000 steps each day isn't necessarily the goal. Maybe you simply want to drop a few pounds, and figure the extra motivation of owning a fitness tracker and having fun, if ultimately meaningless, numbers to hit can't hurt, right?
Wrong! Researchers wanted to know whether wearable fitness trackers like Fitbits, helped people lose weight compared to other behavioral weight-loss techniques, and the short answer is: They don't. In fact, participants who wore fitness trackers during the study lost less weight over two years than those who didn't. Both groups were given six months of low-calorie diets, increased physical activity, and counseling; both groups then had access to telephone and text support for six months. After that, they were divided into two groups, one with fitness trackers and one without, and despite the fact that everyone had undergone diet, exercise, and psychological treatment, the fitness trackers failed to help people drop extra pounds. So you're better off spending your money on vegetables, or putting it toward a gym membership.