The timing of light exposure influences the Body Mass Index (BMI) and percent body fat, says a new study.
People with more exposure to moderate or higher intensity light earlier in the day had lower body mass index and percent body fat than those with more of their moderate or higher intensity light exposure later in the day.
Body Mass Index
Body mass index (BMI) is a simple tool that is generally used to estimate the total amount of body fat.
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"These results emphasize the importance of getting the majority of your exposure to moderate or higher intensity light during the morning and provide further support that changes to environmental light exposure in humans may impact body weight regulation," said study co-author Ivy N. Cheung, a PhD student at Northwestern University in Chicago, Illinois.
The study was presented at the 29th annual meeting of the Associated Professional Sleep Societies LLC in Seattle, Washington. For the study, 23 healthy adults, the majority being female, with a mean age of 26 and a mean BMI of 29, were recruited. They wore a wrist monitor for seven days to determine light patterns.
![BMI May Not Be The Best Measure of Body Weight]( "BMI May Not Be The Best Measure of Body Weight")
BMI-the standard metric for finding out normal weight and detecting obesity, is not an accurate measurement and doesn't explain poor health, scientists claim
Seventeen participants also had total percentage body fat measured using dual axis absorptiometry (DXA). Light data was sent into 2 minute epochs, smoothed using a 10-minute moving average, and then aggregated over 24 hours for each individual.
Height and weight were objectively measured to determine BMI.
Source: IANS
BMI May Not Be The Best Measure of Body Weight
BMI-the standard metric for finding out normal weight and detecting obesity, is not an accurate measurement and doesn't explain poor health, scientists claim
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Seventeen participants also had total percentage body fat measured using dual axis absorptiometry (DXA). Light data was sent into 2 minute epochs, smoothed using a 10-minute moving average, and then aggregated over 24 hours for each individual.
Height and weight were objectively measured to determine BMI.
Source: IANS
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