SLEEP – RESTING METABOLIC RATE


1 RESEARCH ARTICLE


RESTING METABOLIC RATE VARIES BY RACE AND BY SLEEP DURATION – 2015


Andrea M. Spaeth1,*, F. Dinges2 and Namni Goel2
METHODS
– Healthy adults participated in a controlled laboratory study
– After two baseline sleep nights, subjects were randomized to
(1) an experimental (n = 36; 4 h sleep/night for five nights followed by one night with 12 h recovery sleep)
(2) control condition (n = 11; 10 h sleep/night)
RESULTS
(1) Resting metabolic rate—largest component of energy expenditure—decreased after sleep restriction (−2.6%) returned to baseline levels after recovery sleep
(2) No changes in resting metabolic rate were observed in control subjects
(3) Relative to Caucasians (n = 14), African Americans (n = 22) exhibited comparable daily caloric intake but a lower resting metabolic rate and higher respiratory quotient regardless of sleep duration
CONCLUSIONS
– Sleep restriction decreased morning resting metabolic rate in healthy adults
– This suggests that sleep loss leads to metabolic changes aimed at conserving energy


 

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