During four one-week periods over consecutive school terms, the kids wore the ActiGraphs nearly every waking moment.
连续几个学期,在四次为期一个星期的时间里,孩子们几乎在一切醒着的时候都穿着ActiGraphs。
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But according to the actigraphs, the men were actually sleeping a bit less than 6-and-a-half hours, while the women were logging about 15 minutes more.