Kumahara H Yoshioka M Yoshitake Y Shindo M Schutz Y Tanaka H 2004 Previous studies have demonstrated the difference between the basal metabolic rate (BMR) and the sleeping metabolic rate (SMR): however, the difference in the Japanese population has not yet been explored. This study examined the relationship between the BMR and SMR in ninety-four healthy Japanese subjects (37 males and 57 females, 39 +/- 12 y of age and 22.0 +/- 7.4% body fat) in a respiratory chamber. The SMR was significantly lower than the BMR (1416 +/- 245 vs. 1492 +/- 256 kcal/d): however, there was a highly significant correlation between the two (r = 0.867; p < 0.001). The ratio of SMR/BMR largely varied among individuals (0.95 +/-0.08, 8.4% of the coefficient of variation). The ratio was significantly lower in males than in females (0.93 +/- 0.10 vs. 0.97 +/- 0.06, p < 0.05). None of the anthropometric measures (age, weight, body mass index, body surface area or percent body fat) correlated with the ratio. These results showed that SMR was 95%, of BMR on average in a healthy Japanese group. However, when applied over a longer time period (24 h or more), the difference tends to become negligible for most analyses in a group. Although the difference between SMR and BMR will induce a 5% gap of physical activity level defined as the total energy expenditure divided by the BMR or SMR, this factor seems to have little practical importance in epidemiological research. application/pdf https://sonar.ch/global/documents/251034 eng info:eu-repo/semantics/altIdentifier/doi/10.3177/jnsv.50.441 info:eu-repo/semantics/altIdentifier/pmid/15895522 info:eu-repo/semantics/openAccess Journal of nutritional science and vitaminology. - 2004 Adult Basal Metabolism Energy Metabolism Female Humans Japan Male Middle Aged Sleep The difference between the basal metabolic rate and the sleeping metabolic rate in Japanese. http://purl.org/coar/resource_type/c_6501