Bidirectional association between physical activity and sleep in healthy Japanese super-seniors : the Japan Healthy Aging Study (J-HAS)
To address the challenges of an ageing population, it is important to promote health by identifying factors for healthy ageing. The aim of this study was to investigate the bidirectional association between physical activity (PA) and sleep in healthy Japanese super-seniors over the age of 80. For approximately 1 year, 124 participants wore wearable devices and answered daily lifestyle questionnair
