Abstract:
BACKGROUND:The purpose of the present study is to investigate effects of tryptophan intake and light exposure on melatonin secretion and sleep by modifying tryptophan ingestion at breakfast and light exposure during the daytime, and measuring sleep quality (by using actigraphy and the OSA sleep inventory) and melatonin secretion at night. METHODS:Thirty three male University students (mean ± SD age: 22 ± 3.1 years) completed the experiments lasting 5 days and 4 nights. The subjects were randomly divided into four groups: Poor*Dim (n = 10), meaning a tryptophan-poor breakfast (55 mg/meal) in the morning and dim light environment (<50 lx) during the daytime; Rich*Dim (n = 7), tryptophan-rich breakfast (476 mg/meal) and dim light environment; Poor*Bright (n = 9), tryptophan-poor breakfast and bright light environment (>5,000 lx); and Rich*Bright (n = 7), tryptophan-rich breakfast and bright light. RESULTS:Saliva melatonin concentrations on the fourth day were significantly lower than on the first day in the Poor*Dim group, whereas they were higher on the fourth day in the Rich*Bright group. Creatinine-adjusted melatonin in urine showed the same direction as saliva melatonin concentrations. These results indicate that the combination of a tryptophan-rich breakfast and bright light exposure during the daytime could promote melatonin secretion at night; further, the observations that the Rich*Bright group had higher melatonin concentrations than the Rich*Dim group, despite no significant differences being observed between the Poor*Dim and Rich*Dim groups nor the Poor*Bright and Rich*Bright groups, suggest that bright light exposure in the daytime is an important contributor to raised melatonin levels in the evening. CONCLUSIONS:This study is the first to report the quantitative effects of changed tryptophan intake at breakfast combined with daytime light exposure on melatonin secretion and sleep quality. Evening saliva melatonin secretion changed significantly and indicated that a tryptophan-rich breakfast and bright light exposure during the daytime promoted melatonin secretion at this time.
journal_name
J Physiol Anthropoljournal_title
Journal of physiological anthropologyauthors
Fukushige H,Fukuda Y,Tanaka M,Inami K,Wada K,Tsumura Y,Kondo M,Harada T,Wakamura T,Morita Tdoi
10.1186/1880-6805-33-33subject
Has Abstractpub_date
2014-11-19 00:00:00pages
33eissn
1880-6791issn
1880-6805pii
1880-6805-33-33journal_volume
33pub_type
杂志文章abstract:BACKGROUND:The present study analyses changes in body composition over the course of a working week. The purpose of the study is to identify the size of the changes in the observed parameters by means of typical error of measurement (TE) as the initial value for the interpretation of the detected changes in the repeate...
journal_title:Journal of physiological anthropology
pub_type: 杂志文章
doi:10.1186/s40101-015-0070-6
更新日期:2015-09-22 00:00:00
abstract:BACKGROUND:Diversity among human leukocyte antigen (HLA) molecules has been maintained by host-pathogen coevolution over a long period of time. Reflecting this diversity, the HLA loci are the most polymorphic in the human genome. One characteristic of HLA diversity is long-term persistence of allelic lineages, which ca...
journal_title:Journal of physiological anthropology
pub_type: 杂志文章
doi:10.1186/1880-6805-33-14
更新日期:2014-06-13 00:00:00
abstract::Previous studies have demonstrated that during lower-body exercise the percentage of heart rate reserve (%HRR) is equivalent to the percentage of the oxygen consumption reserve (%V˙O(2R)) but not to a percentage of the peak oxygen consumption (%V˙O(2peak)). The current study examined these relationships in trained sur...
journal_title:Journal of physiological anthropology
pub_type: 杂志文章
doi:10.2114/jpa2.29.189
更新日期:2010-01-01 00:00:00
abstract:BACKGROUND:Empathy is deeply linked with the ability to adapt to human social environments. The present study investigated the relationship between the empathy trait and attention elicited by discriminating facial expressions. METHODS:Event-related potentials were measured while 32 participants (17 men and 15 women) d...
journal_title:Journal of physiological anthropology
pub_type: 杂志文章
doi:10.1186/1880-6805-33-4
更新日期:2014-01-24 00:00:00
abstract::The purpose of this study was to comparatively investigate the energy expenditure of jumping on sand and on a firm surface. Eight male university volleyball players were recruited in this study and performed 3 sets of 10 repetitive jumps on sand (the S condition), and also on a force platform (the F condition). The su...
journal_title:Journal of physiological anthropology
pub_type: 临床试验,杂志文章
doi:10.2114/jpa2.25.59
更新日期:2006-01-01 00:00:00
abstract::The purpose of the study was to investigate the degree of subject variability in the peripheral and core temperature thresholds of the onset of shivering and sweating. Nine healthy young male subjects participated in three trials. In the first two trials, wearing only shorts, they were exposed to air temperatures of 5...
journal_title:Journal of physiological anthropology
pub_type: 临床试验,杂志文章
doi:10.2114/jpa2.26.403
更新日期:2007-05-01 00:00:00
abstract::The purposeful application of fermentation in food and beverage preparation, as a means to provide palatability, nutritional value, preservative, and medicinal properties, is an ancient practice. Fermented foods and beverages continue to make a significant contribution to the overall patterns of traditional dietary pr...
journal_title:Journal of physiological anthropology
pub_type: 杂志文章,评审
doi:10.1186/1880-6805-33-2
更新日期:2014-01-15 00:00:00
abstract:BACKGROUND:Wearing an activity monitor as a motivational tool and incorporating a behavior-based reward system or a computerized game element might have a synergistic effect on an increase in daily physical activity, thereby inducing body fat reduction. This pilot crossover study aimed to examine the effects of a short...
journal_title:Journal of physiological anthropology
pub_type: 杂志文章
doi:10.1186/1880-6805-33-35
更新日期:2014-12-02 00:00:00
abstract::The influence of physical activity on body mass components has been studied using a sample of Moscow children. 195 girls and 259 boys of Russian ethnicity from 12 to 17 years old were investigated cross-sectionally in 2005 in different Moscow schools. According to the level of physical activity they were divided into ...
journal_title:Journal of physiological anthropology
pub_type: 杂志文章
doi:10.2114/jpa2.26.229
更新日期:2007-03-01 00:00:00
abstract::This study focused on whether wheelchair users showed enhanced ability to estimate the space required for locomotion with familiar and unfamiliar wheelchairs. Tetraplegic participants, who lacked somatosensory input from the upper limbs and were unable to obtain information about the dimensions of a wheelchair from th...
journal_title:Journal of physiological anthropology
pub_type: 杂志文章
doi:10.2114/jpa2.28.15
更新日期:2009-01-01 00:00:00
abstract::The aim of this study was to investigate the effects of vegetable tablets containing Gamma-Aminobutyric Acid (GABA) intake on cardiovascular response and the autonomic nervous system in young adults. In a double-blind, randomized controlled trial, 7 healthy subjects were assigned to take vegetable tablets (10 g/trial)...
journal_title:Journal of physiological anthropology
pub_type: 杂志文章,随机对照试验
doi:10.2114/jpa2.28.101
更新日期:2009-01-01 00:00:00
abstract::The purpose of this study was to highlight the issues related to thickness-based muscle size evaluation that is commonly done in field studies. The cross-sectional area, thickness (the vertical distance from the upper end of the elbow flexors to that of the humerus) and width (the horizontal distance from the left to ...
journal_title:Journal of physiological anthropology
pub_type: 杂志文章
doi:10.2114/jpa2.30.169
更新日期:2011-01-01 00:00:00
abstract::A specially designed mental task was performed by 16 subjects for frequency domain analysis of skin conductance (SC) to evaluate mental workload. The task was to memorize target letters, detect them within a 4 x 4 alphabet arrangement, and answer whether the number of targets contained in the arrangement corresponded ...
journal_title:Journal of physiological anthropology
pub_type: 杂志文章
doi:10.2114/jpa2.27.173
更新日期:2008-06-01 00:00:00
abstract::The present study investigated whether room temperature (T(a)) cycles around dusk and dawn could influence the circadian rhythm of rectal temperature (T(core)), urinary 6-hydroxymelatonin sulfate during nocturnal sleep, and subjective assessments of sleep in humans. Six female and two male students served as participa...
journal_title:Journal of physiological anthropology
pub_type: 杂志文章
doi:10.2114/jpa2.26.429
更新日期:2007-06-01 00:00:00
abstract:BACKGROUND:Growth references (growth charts) are used to assess the nutritional and growth status of children. In developed countries, there are growth charts based on the country's national surveys. However, many developing countries do not have their own growth references, so they usually use WHO and US CDC reference...
journal_title:Journal of physiological anthropology
pub_type: 杂志文章
doi:10.1186/s40101-020-00244-8
更新日期:2020-11-16 00:00:00
abstract::The purpose of this study was to establish a numerical computation model for estimation of oxygen uptake (V(.)O2) kinetics in decremental load exercise (DLE) starting from a work rate (WR) above the ventilatory threshold (>VT). In the model, WR in DLE were separated into several steps (constant load exercise, CLE) of ...
journal_title:Journal of physiological anthropology
pub_type: 杂志文章
doi:10.2114/jpa2.27.247
更新日期:2008-09-01 00:00:00
abstract::The number of cellular phone subscribers is increasing every year and there have been reports of health disorders related to the high-frequency radio waves. This paper considers the dependence of Thai university and high school students on cellular phones. A survey form (cellular phone dependence questionnaire: CPDQ) ...
journal_title:Journal of physiological anthropology
pub_type: 杂志文章
doi:10.2114/jpa2.25.377
更新日期:2006-11-01 00:00:00
abstract:BACKGROUND:Age-related changes affect driving ability, including the smoothness of driving. This operation requires the use of both allocentric strategies (based on world-centered representations) and egocentric strategies (based on self-centered representations); however, with age, a greater preference for egocentric ...
journal_title:Journal of physiological anthropology
pub_type: 杂志文章
doi:10.1186/s40101-020-00227-9
更新日期:2020-08-27 00:00:00
abstract::The origin of the slow component (SC) of oxygen uptake kinetics, presenting during exercise above the ventilatory threshold (VT), remains unclear. Possible physiologic mechanisms include a progressive recruitment of type II muscle fibers. The purpose of this study was to examine alterations in muscle activity through ...
journal_title:Journal of physiological anthropology
pub_type: 杂志文章
doi:10.2114/jpa2.26.541
更新日期:2007-09-01 00:00:00
abstract:BACKGROUND:Bright light at night is known to suppress melatonin secretion. Novel photoreceptors named intrinsically photosensitive retinal ganglion cells (ipRGCs) are mainly responsible for projecting dark/bright information to the suprachiasmatic nucleus and thus regulating the circadian system. However, it has been s...
journal_title:Journal of physiological anthropology
pub_type: 杂志文章
doi:10.1186/s40101-018-0183-9
更新日期:2018-10-19 00:00:00
abstract:BACKGROUND:This study aimed to examine the association of walking difficulty with bone mass or bone turnover among community-dwelling Japanese people aged 40 years and older. METHODS:We studied 1097 community-dwelling Japanese people aged 40 years and older (379 men and 718 women) who were invited to participate in pe...
journal_title:Journal of physiological anthropology
pub_type: 杂志文章
doi:10.1186/s40101-016-0114-6
更新日期:2016-10-11 00:00:00
abstract::The effects of reward and punishment are different, and there are individual differences in sensitivity to reward and punishment. The purpose of this study was to investigate the effects of reward and punishment on task performance, mood, and autonomic nervous function, along with the interaction with personality. Twe...
journal_title:Journal of physiological anthropology
pub_type: 杂志文章
doi:10.2114/jpa2.28.181
更新日期:2009-06-01 00:00:00
abstract::We examined the effects of monochromatic light on the time sense and the central nervous system. Nine young adult volunteers participated in this study. They were exposed to red-light and blue-light environments (illuminance was kept at 310 lx). We evaluated the time sense by time-production tests of 90 s and 180 s an...
journal_title:Journal of physiological anthropology
pub_type: 杂志文章
doi:10.2114/jpa2.26.95
更新日期:2007-03-01 00:00:00
abstract:BACKGROUND:Obesity is defined as unhealthy excess body fat, which increases the risk of premature mortality from noncommunicable diseases. Early screening and prevention of obesity is critical for averting associated morbidity, disability, and mortality. Ethiopia has been using the international (WHO's) BMI cut-off for...
journal_title:Journal of physiological anthropology
pub_type: 杂志文章
doi:10.1186/s40101-019-0205-2
更新日期:2019-10-26 00:00:00
abstract:BACKGROUND:An increasing number of older adults require improvements in their quality of life. Physical activities, particularly walking ability, are of primary importance for older adults. The influence of season on physical activity has not been sufficiently studied among older adults. Therefore, this report compared...
journal_title:Journal of physiological anthropology
pub_type: 杂志文章
doi:10.1186/s40101-015-0071-5
更新日期:2015-10-02 00:00:00
abstract:BACKGROUND:Activated mineralocorticoid receptors influence the association between daily salt intake and blood pressure. A relatively low mineralocorticoid receptor function is reported to be a risk for mental distress such as depression. Since mental distress is also a known risk for hypertension and cardiovascular di...
journal_title:Journal of physiological anthropology
pub_type: 杂志文章
doi:10.1186/s40101-015-0064-4
更新日期:2015-06-25 00:00:00
abstract::In this study, we described the joint angle changes of the trailing leg during the compensatory step used to recover balance following a forward slip while walking. Fifteen healthy young males walked on a walkway which incorporated a movable platform to simulate a forward slip while walking. In 12 out of the 15 subjec...
journal_title:Journal of physiological anthropology
pub_type: 杂志文章
doi:10.2114/jpa2.27.309
更新日期:2008-11-01 00:00:00
abstract:BACKGROUND:Reaction time for anti-saccade, in which the gaze is directed to the position opposite to an illuminated target, shortens during maintenance of neck flexion. The present study applied transcranial magnetic stimulation (TMS) to the frontal oculomotor field, and investigated the effect of maintaining neck flex...
journal_title:Journal of physiological anthropology
pub_type: 杂志文章
doi:10.1186/1880-6805-32-21
更新日期:2013-11-13 00:00:00
abstract::The soleus, one of the triceps surae muscles, greatly contributes to standing and walking. Strength training focused on the soleus could be important to prevent age-related deterioration in these functions. We therefore investigated the effects of regular heel-raise training focused on the soleus for the elderly. Fort...
journal_title:Journal of physiological anthropology
pub_type: 杂志文章
doi:10.2114/jpa2.29.23
更新日期:2010-01-01 00:00:00
abstract:BACKGROUND:Non-shivering thermogenesis (NST) involves a substantial amount of energy expenditure in humans and, thus, contributes to reducing the risk for obesity. Molecular evolutionary studies have reported that SNPs in/near the uncoupling protein 3 gene (UCP3) and the regulatory associated protein of mTOR complex 1 ...
journal_title:Journal of physiological anthropology
pub_type: 杂志文章
doi:10.1186/1880-6805-33-38
更新日期:2014-12-22 00:00:00