The researchers discovered that the women who did “brief bursts” of high-intensity, weight-bearing exercise similar to a medium-paced run had better bone health. Specifically, the women who did, on average, 60 to 120 seconds of these exercise bursts every day had 4 percent better bone health than those who did them for less than a minute. And it seems that the more you do, the better: The researchers also found that people who did more than two minutes a day had 6 percent better bone health. 

It’s worth pointing out that, because this is a cross-sectional study, scientists can’t be sure whether a minute or so creates better bones or if people who have good bones just tend to do this type of exercise.