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Relationship between expended energy and stored energy as lean and adipose tissues in growing rats
Author(s) -
Tai Yuki,
Fujii Takako,
Maeda Megumi,
Okamura Koji
Publication year - 2015
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.29.1_supplement.lb362
Subject(s) - adipose tissue , lean tissue , chemistry , zoology , body weight , lean body mass , energy expenditure , endocrinology , medicine , biology , biochemistry
Since the energy contents differ between lean tissue (1,050 kcal/kg) and adipose tissue (7,600 kcal/kg) and lean tissue is considered to expend a greater amount of energy for the synthesis of a greater amount of protein, the energy expended for growth varies theoretically depending on the amount and the ratio of the increases in these two tissues. Five growing rats (4 weeks old, body weight (BW) 102 g (SD 9)) were fed a standard diet ad‐libitum and the BW, total energy consumption (TEC) and expenditure (TEE) were measured for 14 days. The energy stored in the body (EST) was calculated by subtracting TEE from TEC. TEC, TEE and EST were 1,081 kcal (SD 92), 622 kcal (SD 32), 458 kcal (SD 80), respectively. Forty‐two percent of the energy consumed was stored in the body, while 58% of it was expended. As the BW increased by 135 g (SD 10), the energy stored for 1 kg of the body was calculated to be 3,370 kcal (SD 406). Based on the energy contents in the lean tissue and the adipose tissue and the EST, the estimated increases in the lean tissue and the adipose tissue appeared to be 87 g and 48 g, respectively, and the ratio of the increases was 64:36 in growing rats.