title: Reading and listening to music increase resting energy expenditure during an indirect calorimetry test.
abstract: Indirect calorimetry is often done early in the morning in a fasting state, with the subject unshowered and abstained from caffeine or other stimulants. Subjects often fall asleep, resulting in measurement of a sleeping metabolic rate rather than a resting metabolic rate. The objective of this study was to determine whether listening to self-selected relaxing music or reading an electronic device or magazine affects resting energy expenditure (REE) during measurement in healthy adults. A randomized trial comparing three different conditions (ie, resting, reading, and listening to music) was performed. Sixty-five subjects (36 female and 29 male) were used in final data analysis. Inclusion criteria included healthy subjects between the ages of 18 and 50 years with a stable weight. Exclusion criteria included pregnant or lactating women or use of medications known to affect metabolism. Results showed that reading either a magazine or an electronic device significantly increased REE by 102.7 kcal/day when compared with resting (P<0.0001); however, there was no difference in REE between the electronic device and magazine. Listening to self-selected relaxing music increased REE by 27.6 kcal/day compared with rest (P=0.0072). Based on our results, we recommend subjects refrain from reading a magazine or electronic device during an indirect calorimetry test. Whether or not the smaller difference found while listening to music is practically significant would be a decision for the indirect calorimetry test administrator.
authors.forename: Blaire
authors.initials: B
authors.lastname: Snell
authors.forename: Susan
authors.initials: S
authors.lastname: Fullmer
authors.forename: Dennis L
authors.initials: DL
authors.lastname: Eggett
mesh_terms: D000293:Adolescent; D000328:Adult; D001481:Basal Metabolism / Q000502:physiology*; D001827:Body Height; D015992:Body Mass Index; D001835:Body Weight; D002153:Calorimetry, Indirect; D005260:Female; D064368:Healthy Volunteers; D006801:Humans; D008297:Male; D008875:Middle Aged; D009146:Music; D011932:Reading; D055815:Young Adult
keywords: Indirect calorimetry; Music; Reading; Resting activities; Resting energy expenditure (REE)