Details

Autor(en) / Beteiligte

• Lo, June C
• Leong, Ruth L F
• Ng, Alyssa S C
• Jamaluddin, S Azrin
• Ong, Ju Lynn
• Ghorbani, Shohreh
• Lau, TeYang
• Chee, Nicholas I Y N
• Gooley, Joshua J
• Chee, Michael W L

Titel

Cognitive effects of split and continuous sleep schedules in adolescents differ according to total sleep opportunity

Ist Teil von

• Sleep (New York, N.Y.), 2020-12, Vol.43 (12)

Ort / Verlag

US: Oxford University Press

Erscheinungsjahr

2020

Quelle

Oxford Journals 2020 Medicine

Beschreibungen/Notizen

• Abstract Study Objectives We compared the basic cognitive functions of adolescents undergoing split (nocturnal sleep + daytime nap) and continuous nocturnal sleep schedules when total sleep opportunity was either below or within the recommended range (i.e. 6.5 or 8 h). Methods Adolescent participants (age: 15–19 year) in the 8-h split (n = 24) and continuous (n = 29) sleep groups were compared with 6.5-h split and continuous sleep groups from a previous study (n = 58). These protocols involved two baseline nights (9-h time-in-bed [TIB]), 5 nights of sleep manipulation, 2 recovery nights (9-h TIB), followed by a second cycle of sleep manipulation (3 nights) and recovery (2 nights). Cognitive performance, subjective sleepiness, and mood were evaluated daily; sleep was assessed using polysomnography. Results Splitting 6.5 h of sleep with a mid-afternoon nap offered a boost to cognitive function compared to continuous nocturnal sleep. However, when total TIB across 24 h increased to 8 h, the split and continuous sleep groups performed comparably in tests evaluating vigilance, working memory, executive function, processing speed, subjective sleepiness, and mood. Conclusions In adolescents, the effects of split sleep on basic cognitive functions vary by the amount of total sleep obtained. As long as the total sleep opportunity across 24 h is within the recommended range, students may fulfill sleep requirements by adopting a split sleep schedule consisting of a shorter period of nocturnal sleep combined with a mid-afternoon nap, without significant impact on basic cognitive functions. Clinical trial registration NCT04044885.