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Increase in skimmed milk intakes brings positive calcium balances during body weight reduction by exercise
Author(s) -
Yamada Tetsuo,
Kurasawa Shinichi,
Matsuzaki Masami,
Tanaka Akira
Publication year - 2013
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.27.1_supplement.854.8
Subject(s) - calcium , skimmed milk , zoology , chemistry , magnesium , crossover study , endocrinology , parathyroid hormone , body weight , medicine , food science , biology , alternative medicine , organic chemistry , pathology , placebo
Suitable diets during body weight‐loss programs are not understood in detail. We investigated the effects of increasing skimmed milk intakes on nutritional status and metabolism of calcium and magnesium. Methods Six adult male volunteers participated in crossover trial, i.e., two experiments over eight days. The first four days were an adjustment period consuming control diets (energy, 2,553 kcal; calcium, 1,028 mg; magnesium, 343 mg; mean intake levels per day). During the second four days, the participants exercised on a bicycle ergometer (mean additional energy, 511 kcal per day), and consumed either control diets or experimental diets which contained increased skimmed milk but the same energy levels as control diets. Results Although urinary and fecal calcium excretion levels were higher, calcium balances were significantly more positive during experimental period than during control period. Whereas magnesium balances during increased skimmed milk intakes are almost the same as during control diets. On the other hand, no significant differences in serum calcium, magnesium and intact parathyroid hormone (PTH) levels were observed between two diet methods. Conclusions Increase in skimmed milk intakes brings positive calcium balances during body weight reduction by exercise, but the regulation of calcium by PTH is not clear. This study was supported by a grant from Kanto Gakuin University.