Atsuo Tsuchiya, Ryo Ogaki, Kosuke Tanabe
The outbreak of novel coronavirus infection forced many sports to take extended periods of inactivity, which may have had a significant impact on athletes' conditioning. Therefore, in this study, we conducted a questionnaire survey of 64 male collegiate rugby players (mean age: 20.6 years) asking about their sleep status in August 2020, after an extended period of inactivity (approximately 2 months).