Five School Days Successive 24 Hours Measurement of Physical Activity and Sleep of Four Years Old Children’s Attending Nursery School of Japan

There are two quite different types of preschool, kindergarten and nursery school (NS), in Japan. Must have nap time etc., nursery school operation is strongly restricted by the government, and these restrictions are thought to decrease children’s physical activity (PA) at NS, increase late night PA, make sleep start time late and lower the quality of sleep. To overcome these weak points of NS, Yokohama Nazareth NS has been making many efforts to increase children’s PA at NS. We measured nursery schoolers’ PA and sleep behavior, and compared them with those of kindergarteners’ previously reported.