I am a PhD student of the Sleep Research Center and Institute of Brain Science at National Yang-Ming University, Taipei, Taiwan. My research focuses on effects of cold exposure on autonomic function during sleep period and morning blood pressure surge (MBPS) in normotensives after morning awaking by using polysomnography (PSG), miniature physiological signal recorder (TD1, Taiwan Telemedicine Device Company, Taiwan) and autonomic blood pressure (BP) monitor, which can record BP every 30 minutes. Currently I have been conducting a research to explore the effects of cold exposure in prehypertensives, which is known as slightly increase in BP and have high risk of turning into hypertension, ...