title: The difference between the basal metabolic rate and the sleeping metabolic rate in Japanese.
abstract: 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.
authors.affiliation: Institute of Physiology, Faculty of Medicine, University of Lausanne, Rue du Buygnon 7, Lausanne CH-1005, Switzerland.
authors.forename: Hideaki
authors.initials: H
authors.lastname: Kumahara
authors.forename: Mayumi
authors.initials: M
authors.lastname: Yoshioka
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Yoshitake
authors.forename: Munehiro
authors.initials: M
authors.lastname: Shindo
authors.forename: Yves
authors.initials: Y
authors.lastname: Schutz
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Tanaka
mesh_terms: D000328:Adult; D001481:Basal Metabolism; D004734:Energy Metabolism; D005260:Female; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D012890:Sleep / Q000502:physiology*