Posts Tagged ‘body weight’

Can Weight and Diet Predict Sleep Quality:

Wednesday, June 15th, 2016


Holistic-Health-Show-with-Dr-Carl-O-HelvieA new study presented at the American Professional Sleep Society this week in Denver concluded that an individual’s body composition and caloric intake can influence time spent in specific sleep stages . In the study 36 healthy adults spent two consecutive nights in bed for 10 hours at the hospital at the U of Pennsylvania. Physiological changes that occur during sleep was recorded on the second night on a Polysomnograph. Body composition and resting energy expenditures were assessed in the morning following the first night of sleep and food/drink intake were measured and recorded each day.

Results showed that body mass index (BMI), body fat percentage and resting energy expenditures were not significant predictors of sleep stage duration. However, overweight adults exhibited a higher percentage  of time spent in the rapid-eye movement (REM) stage of sleep than normal-weight adults.  REM sleep stage  is when dreams typically occur and is characterized by a faster heart rate and breathing and less restorative sleeping  than in non-REN stages. They also found that increased protein intake predicted less stage 2 sleep and predicted more REM sleep. Stage 2 sleep is the period when a person’s  heart rate and breathing are relatively normal and his/her body temperature is slightly lower. Researchers said further research is needed to determine whether changing protein intake alters REM sleep duration and to find the biologicval mechanism behind this relationship.

Does Weight Influence Survival of Colorectal Patients?

Wednesday, July 8th, 2015

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A new study presented at the European Society for Medical Oncology World Congress on Gastrointestinal Cancer recently reported that colorectal patients with a low to healthy body weight lived an average of two and a half months less than overweight and obese patients. This is contrary to what was expected because being overweight with a high body index has been associated with a higher risk for colorectal cancer.  Researchers said “Contrary to our hypothesis, patients who had the lowest BMI were at risk for having the shortest survival.” “In this case, patients with the lowest body weight-people who had metastatic colon cancer and a BMI of less than 25–were at the highest risk.” Subjects included over 6,100 patients who had previously been untreated for their metastatic colorectal cancer and who had been  included in 4 different registry studies in the USA and Europe. All received bevacizumab with chemotherapy in their treatment. Bevacizumab or Avastin, is used in patients with metastatic cancer to slow the growth of new blood vessels. Subjects were divided into 4 BMI range groups amd measured overall survival rates and the length of time their tumors stopped growing.  Those with the lowest BMI from 20 to 24.9 that would be considered a healthy weight survived an average of 21.1 months after starting treatment. Subjects with a BMI of 25 to 29, considered overweight, survived an average od 23.5 months; those with BMI of 30 to 35 survived an average of 24 months;  and those with BMIs of 35.1 and higher survived an average of 23.7 months after starting treatment.  Researchers said the study does not indicate that being overweight is in any way protective for patients undergoing cancer treatment but instead, there could be an aspect of biology that could put thinner people at a higher risk for poor outcomes.