The Seasonal Variation of Basal Metabolism and Activity of Thyroid Gland in Man

Osiba, Susumu

doi:10.2170/jjphysiol.7.355

Cited by 54 publications

(43 citation statements)

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“…This is largely based on evidence that BMR and mean annual temperature are strongly inversely related; this association remains even after controlling for population differences in body size (Roberts , 1978. Although most metabolic data have been collected during warmer months, the results of a limited number of multi-season studies support this conclusion through their documentation of highest values during the coldest months (Kashiwazaki 1990;Osiba 1957). Further, a recent study among northern Europeans has also demonstrated seasonal variation in metabolic rate; Danish men and women display a significant seasonal metabolic fluctuation, with the highest SMRs in the winter and the lowest values in the summer (Plasqui et al 2003).…”

Section: Basal Metabolic Ratementioning

confidence: 98%

Metabolic Adaptation in Indigenous Siberian Populations

Leonard

Snodgrass²,

Sorensen

2005

Annu. Rev. Anthropol.

117

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Previous research has suggested that arctic populations have elevated metabolic rates in response to their cold, marginal climate. Recent studies of indigenous Siberian groups have confirmed these earlier findings and have shed light on the mechanisms through which northern populations adapt to their environments. Indigenous Siberians show significant elevations in basal metabolic rate compared with reference values. Total energy expenditure is variable across Siberian groups and is correlated with levels of acculturation. Siberian populations appear to have adapted to cold stress through both short-term acclimatization and genetic adaptations, with thyroid hormones playing an important role in shaping metabolic responses. Elevated metabolic rates also have important consequences for health and may contribute to the low serum lipid levels observed in Siberian groups. Further research is needed to elucidate the underlying mechanisms of metabolic adaptation and their implications for ongoing health changes among indigenous Siberians.

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Section: Basal Metabolic Ratementioning

confidence: 98%

Metabolic Adaptation in Indigenous Siberian Populations

Leonard

Snodgrass²,

Sorensen

2005

Annu. Rev. Anthropol.

117

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“…Research by Leonard and colleagues (1999) demonstrated a link between free thyroxine levels and metabolic variation in indigenous Siberians during a single seasonal period (i.e., the late summer). Other researchers have demonstrated seasonal fluctuations in thyroid hormones in indigenous and non-indigenous high-latitude populations, which appear to be the related to variation in temperature and photoperiod (Osiba, 1957;Eastman et al, 1974;Smals et al, 1977;Tkachev et al, 1991;Bojko, 1997;Hassi et al, 2001).…”

mentioning

confidence: 96%

“…In support of the relationship between climate and metabolic rate, an inverse relationship between BMR and mean annual temperature has been documented, which holds true even when controlled for differences in body size (Roberts, 1952(Roberts, , 1978. Although limited in number, preliminary studies of high-latitude populations provide evidence of seasonal variation in BMR, with the highest measurements taken in the winter (Osiba, 1957;Kashiwazaki, 1990). Recent studies of northern European populations, such as work by Plasqui and colleagues (2003), have documented a significant seasonal metabolic elevation with the highest sleeping metabolic rate (SMR) in the winter and the lowest SMR in the summer.…”

mentioning

confidence: 99%

“…Elevated BMR in circumpolar populations appears to be at least partially related to upregulation of thyroid hormones (Osiba, 1957;Itoh, 1980;Silva, 1995;Leonard et al, 1999Leonard et al, , 2002b. Elevated levels of thyroid hormones (especially tri-iodothyronine [T 3 ] and thyroxine [T 4 ]) promote increased thermogenesis in humans and other mammals by increasing rates of oxidative metabolism throughout the body (Hadley, 1996;Bentley, 1998).…”

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confidence: 99%

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Basal metabolic rate in the Yakut (Sakha) of Siberia

et al. 2005

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Human indigenous circumpolar populations have elevated basal metabolic rates (BMRs) relative to predicted values; this metabolic elevation has been postulated to be a physiological adaptation to chronic and severe cold stress. The present study examines BMR in the Yakut, an indigenous high-latitude population from the Sakha Republic of Russia to determine (1) whether the Yakut show evidence of an elevated BMR, (2) if the Yakut display evidence of age-related changes in BMR, and (3) whether lifestyle differences influence BMR. BMR was measured during the late summer in 75 women and 50 men (ages 18-56 years) from the Siberian village of Berdygestiakh. Measured BMR (+/- SEM) of the entire sample was significantly elevated (+6.5%) compared to predictions based on body mass (6,623.7 +/- 94.9 vs. 6,218.2 +/- 84.7 kJ/day; P < 0.001). Additionally, measured BMR for the entire sample was significantly higher than predictions based on fat-free mass (+20.8%) and surface area (+8.9%). Males and females both showed significant elevations relative to all three standards. The elevated BMR of the Yakut does not appear to be attributable to extreme levels of protein, since the Yakut consume a mixed diet with a substantial proportion of carbohydrates. No significant age-related changes in BMR were found when controlled for body composition. No significant relationship was found between lifestyle variables and BMR, suggesting the possibility of a genetic or developmental mechanism. This study provides additional evidence of metabolic elevation in indigenous circumpolar groups and has important implications for estimating the nutritional requirements of these populations.

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“…The basal metabolic rate of Eskimos (Brown et al 1954) and of people living in poorly-heated European (Gessler, 1925) and Japanese (Osima, 1957) houses may increase in winter. However there is doubt about the significance of the change, at least in Eskimos (Rodahl, 1952;Burton & Edholm, 1955), and Schollander, Hammel, Hart et al (1958) reported only a small increase in the basal metabolic rate of Europeans during 6 weeks of severe field acclimatization to cold; neither months of intermittent exposure to cold (Leblanc, 1956) nor 1-2 weeks continuous exposure of Europeans to moderate cold (Horvath, Freedman & Golden, 1947;Iampietro, Bass & Buskirk, 1957) have been found to increase the basal metabolic rate.…”

Section: Discussionmentioning

confidence: 99%

The effect of repeated daily exposure to cold and of improved physical fitness on the metabolic and vascular response to cold air

Keatinge¹

1961

The Journal of Physiology

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Experiments made to determine the effect of field acclimatization to cold on men's metabolic response to cold have given conflicting results (Burton, 1941;Leblanc, 1956;Scholander, Hammel, Hart, LeMessurier & Steen, 1958). These might be explained in part by the observation that different types of quite brief exposure to cold in the laboratory may either decrease (Keatinge, 1959;Keatinge & Evans, 1961) or increase (Keatinge, 1960) the metabolic response to cold, probably through central nervous adjustments. The present experiments were therefore designed to show whether more prolonged exposure to cold caused similar changes in metabolic response, and whether physical training, which generally accompanies field acclimatization, alters men's subsequent metabolic response to cold. Changes in basal metabolic rate and in non-shivering heat production were also looked for, since there are reports that the basal metabolic rate of men may change with the season

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The Seasonal Variation of Basal Metabolism and Activity of Thyroid Gland in Man

Abstract: Benedict and Carpenter (3), Du Bois (4)) sup

Cited by 54 publications

References 1 publication

Metabolic Adaptation in Indigenous Siberian Populations

Metabolic Adaptation in Indigenous Siberian Populations

Basal metabolic rate in the Yakut (Sakha) of Siberia

The effect of repeated daily exposure to cold and of improved physical fitness on the metabolic and vascular response to cold air

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