Exposure to bright light during evening class hours increases alertness among working college students

Teixeira, Liliane Reis; Löwden, Arne; Luz, Andréa Aparecida da; Turte, Samantha Lemos; Moreno, Cláudia Roberta de Castro; Valente, Daniel; Nagai-Manelli, Roberta; Louzada, Fernando Mazzilli; Fischer, Frida Marina

doi:10.1016/j.sleep.2012.08.017

Cited by 15 publications

(8 citation statements)

References 44 publications

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“…A case report describes a student in Brazil who had a 40-minute delay in sleep on the weekends when electric lights were installed 55. Bright light (8,000 lux) given at 7 pm or at 9 pm reduced nighttime sleepiness in students who had an evening preference and those with a later onset of melatonin 56. One of the effects of technology may be to suppress melatonin, resulting in a delay in sleep onset.…”

Section: Inadequate Sleep Hygienementioning

confidence: 99%

Causes and consequences of sleepiness among college students

Hershner

Chervin

2014

NSS

471

373

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Daytime sleepiness, sleep deprivation, and irregular sleep schedules are highly prevalent among college students, as 50% report daytime sleepiness and 70% attain insufficient sleep. The consequences of sleep deprivation and daytime sleepiness are especially problematic to college students and can result in lower grade point averages, increased risk of academic failure, compromised learning, impaired mood, and increased risk of motor vehicle accidents. This article reviews the current prevalence of sleepiness and sleep deprivation among college students, contributing factors for sleep deprivation, and the role of sleep in learning and memory. The impact of sleep and sleep disorders on academics, grade point average, driving, and mood will be examined. Most importantly, effective and viable interventions to decrease sleepiness and sleep deprivation through sleep education classes, online programs, encouragement of naps, and adjustment of class time will be reviewed. This paper highlights that addressing sleep issues, which are not often considered as a risk factor for depression and academic failure, should be encouraged. Promotion of university and college policies and class schedules that encourage healthy and adequate sleep could have a significant impact on the sleep, learning, and health of college students. Future research to investigate effective and feasible interventions, which disseminate both sleep knowledge and encouragement of healthy sleep habits to college students in a time and cost effective manner, is a priority.

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Section: Inadequate Sleep Hygienementioning

confidence: 99%

Causes and consequences of sleepiness among college students

Hershner

Chervin

2014

NSS

471

373

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“…Berdasarkan penelitian tersebut menyatakan bahwa mahasiswa kedokteran memiliki kualitas tidur yang buruk sehingga berdampak pada penurunan konsentrasi saat proses belajar dan disfungsi aktivitas di siang hari seperti adanya rasa kantuk yang berlebihan di siang hari. 12,13 Berdasarkan uraian di atas, peneliti ingin melakukan penelitian pada mahasiswa Fakultas Kedokteran Universitas Padjadjaran berjenis kelamin laki-laki mengenai perbandingan kualitas tidur mahasiswa Fakultas Kedokteran Universitas Padjadjaran yang menggunakan dan yang tidak menggunakan cahaya lampu saat tidur.…”

Section: Pendahuluanunclassified

Perbandingan Kualitas Tidur Mahasiswa Fakultas Kedokteran Universitas Padjadjaran yang Menggunakan dan Tidak Menggunakan Cahaya Lampu saat Tidur

Sutrisno

Faisal²,

Huda³

2017

jsk

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Irama sirkadian dipengaruhi oleh cahaya lampu dapat menghambat pembentukan hormon melatonin. Baik dan buruknya tidur dilihat dari kualitas tidur. Kualitas tidur buruk memengaruhi keseimbangan fisiologis dan psikologis. Khususnya pada mahasiswa menyebabkan penurunan konsentrasi dan disfungsi aktivitas di siang hari. Penelitian dilakukan pada bulan Juli−November 2016 di Fakultas Kedokteran Universitas Padjadjaran, Jatinangor dan bertujuan untuk mengetahui perbandingan kualitas tidur mahasiswa Fakultas Kedokteran Universitas Padjadjaran yang menggunakan dan tidak menggunakan cahaya lampu saat tidur. Penelitian dengan pendekatan potong lintang ini dilakukan pada populasi yaitu mahasiswa Fakultas Kedokteran Universitas Padjadjaran. Besar sampel berdasarkan rumus analitik komparatif kategorik-kategorik tidak berpasangan sejumlah 80 responden berjenis kelamin laki-laki untuk setiap kategorinya. Instrumen penelitian ini adalah kuesioner Pittsburgh Sleep Quality Index (PSQI) dengan analisis statistik yang digunakan adalah uji Chi-Square. Dari 160 subjek penelitian didapatkan sejumlah 80 orang yang menggunakan lampu dan 80 orang tidak menggunakan lampu saat tidur. Perbandingan kualitas tidur antara kelompok subjek yang menggunakan lampu dan tidak menggunakan lampu dengan uji chi-square didapatkan perbedaan yang tidak bermakna dengan mayoritas subjek memiliki kualitas tidur buruk (p=0,191). Hasil menunjukkan bahwa tidak terdapat perbedaan kualitas tidur mahasiswa Fakultas Kedokteran Universitas Padjadjaran yang menggunakan dan tidak menggunakan cahaya lampu saat tidur.Kata Kunci: Cahaya lampu, kualitas tidur, mahasiswa

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“…With the melanopic irradiance E e,mel (measured in W m -2 ), the "melanopic daylight equivalent illuminance" E mel , (measuring unit lux), at the eye level can be calculated with equation (7) Emel 725,82 lm/W ·Ee,mel If we measure the "photopic" illuminance at eye level of the three light qualities, and the factor a mel,v with the spectroradiometer, we can compute the melanopic daylight equivalent illuminance according equation (6) in an alternative way (see table 3). For a better comparison of E mel we aligned the spectral irradiances to 79.9 mW m -2 nm -1 (see Table 4).…”

Section: Led Light Source Characteristicsmentioning

confidence: 99%

“…Consequently, light leading to melatonin suppression during night time should be avoided, as melatonin is crucial for good sleep. However, the activating effects of light may be used in the evening, but exposure to high amounts of the blue spectral component may lead to delay of melatonin secretion and shifting of circadian rhythms [6]. This paper aims to describe one approach to assess the melatonin suppressing potential of light sources on the basis of mathematical algorithms that can be utilized as a conceptual platform for planning visual and nonvisual effective lighting for optimal healing environments.…”

Section: Introductionmentioning

confidence: 99%

Human Adequate Lighting in Optimal Healing Environments – Measuring Non-visual Light Effects of a LED Light Source According to German Draft Pre-standard DIN SPEC 5031-100:2012

Plischke¹,

Schierz

Paulick

et al. 2013

Human-Computer Interaction. Applications and Services

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Abstract. Exposing human beings to natural light has many empirically and experimentally corroborated effects on health, well-being and quality of life. One important effect is the entrainment of the human "master clock" to the 24h rhythm of the solar day. In contrast, being surrounded by darkness during the night increases blood levels of melatonin, the brain derived "sleep hormone", and thus signaling other organs aside from the brain. However, in contrast to earlier times, particularly in urban areas distinct periods of the day marked by bright and dark light conditions are scarce, as modern lifestyle has changed and artificial lighting is present in cities on a 24 hour basis. In addition to the merely "visual" effects, light also exhibits non-visual, but biologically relevant (time, spatial, quality and quantity dependent) effects, that are mediated by specialized cells in the eye. These non-visual effects, such as the suppression of melatonin during nighttime may potentially be regarded as a severe risk factor to human health. Due to the discovery of the relationship of light exposure and melatonin suppression, studies have been conducted to evaluate which properties of light are most effective in suppressing melatonin.In 2009 a first pre-standard for determining the non-visual effects of light mediated through the eye was established by the German Institute of Standardization (DIN). In this paper we describe, according to the standard, one approach to assess melatonin suppressing potential of light sources on the basis of mathematical algorithms that can be utilized as a conceptual platform for planning visual and non-visual effective lighting for optimal healing environments.

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Exposure to bright light during evening class hours increases alertness among working college students

Cited by 15 publications

References 44 publications

Causes and consequences of sleepiness among college students

Causes and consequences of sleepiness among college students

Perbandingan Kualitas Tidur Mahasiswa Fakultas Kedokteran Universitas Padjadjaran yang Menggunakan dan Tidak Menggunakan Cahaya Lampu saat Tidur

Human Adequate Lighting in Optimal Healing Environments – Measuring Non-visual Light Effects of a LED Light Source According to German Draft Pre-standard DIN SPEC 5031-100:2012

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