Importance Light at night causes circadian disruption, which is a known risk factor for adverse cardiovascular outcomes. However, it is not well understood whether personal light exposure patterns predicts and individual’s risk of cardiovascular diseases.Objective To assess whether day and night light exposure predicts incidence of cardiovascular diseases, and whether relationships of light with cardiovascular… Continue reading Personal night #light exposure predicts incidence of #cardiovascular diseases in >88,000 individuals
Tag: light
#Light stimulation of mitochondria reduces blood #glucose levels
Mitochondria regulate metabolism, but solar light influences its rate. Photobiomodulation (PBM) with red light (670 nm) increases mitochondrial membrane potentials and adenosine triphosphate production and may increase glucose demand. Here we show, with a glucose tolerance test, that PBM of normal subjects significantly reduces blood sugar levels. A 15 min exposure to 670 nm light reduced the degree… Continue reading #Light stimulation of mitochondria reduces blood #glucose levels
Effects of calibrated blue–yellow changes in light on the human #circadian clock
Evening exposure to short-wavelength light can affect the circadian clock, sleep and alertness. Intrinsically photosensitive retinal ganglion cells expressing melanopsin are thought to be the primary drivers of these effects. Whether colour-sensitive cones also contribute is unclear. Here, using calibrated silent-substitution changes in light colour along the blue–yellow axis, we investigated whether mechanisms of colour… Continue reading Effects of calibrated blue–yellow changes in light on the human #circadian clock
Light at night in older age is associated with obesity, diabetes, and hypertension
Light at night (LAN) has been associated with negative health consequences and metabolic risk factors. Little is known about the prevalence of LAN in older adults in the U.S. and its association with cardiovascular disease (CVD) risk factors. We tested the hypothesis that LAN in older age is associated with higher prevalence of individual CVD… Continue reading Light at night in older age is associated with obesity, diabetes, and hypertension
Light exposure during sleep impairs cardiometabolic function
SignificanceAmbient nighttime light exposure is implicated as a risk factor for adverse health outcomes, including cardiometabolic disease. However, the effects of nighttime light exposure during sleep on cardiometabolic outcomes and the related mechanisms are unclear. This laboratory study shows that, in healthy adults, one night of moderate (100 lx) light exposure during sleep increases nighttime… Continue reading Light exposure during sleep impairs cardiometabolic function
The influence of bright and dim light on substrate metabolism, energy expenditure and thermoregulation in insulin-resistant individuals depends on time of day
Aims/hypothesisIn our modern society, artificial light is available around the clock and most people expose themselves to electrical light and light-emissive screens during the dark period of the natural light/dark cycle. Such suboptimal lighting conditions have been associated with adverse metabolic effects, and redesigning indoor lighting conditions to mimic the natural light/dark cycle more closely… Continue reading The influence of bright and dim light on substrate metabolism, energy expenditure and thermoregulation in insulin-resistant individuals depends on time of day
Effect of Transcranial Near-Infrared #Light 1068 nm Upon #Memory Performance in Aging Healthy Individuals: A Pilot Study
We present a pilot study of near-infrared (NIR) 1068 nm transcranial photobiomodulation therapy (PBM-T). Impact upon motor function, memory, and processing speed in healthy individuals, older than 45 years of age, was evaluated. Methods: PBM-T was performed at home using a transcranial phototherapy device, a helmet that comprised 14 air cooled light emitting diode panel arrays,… Continue reading Effect of Transcranial Near-Infrared #Light 1068 nm Upon #Memory Performance in Aging Healthy Individuals: A Pilot Study
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