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Smaller decreases in protein and greater decreases in fat may be associated with exercise training before body mass reduction
Author(s) -
Nakashima Ayumi,
Nishijima Ruri,
Okamura Koji
Publication year - 2012
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.26.1_supplement.820.11
Subject(s) - glycogen , medicine , endocrinology , chemistry , adipose tissue , fat mass , lean body mass , zoology , body weight , biology
The effect of exercise training before body mass reduction on body composition and energy storage in the body after body mass reduction was studied in rats. Twenty‐one rats (all 4 weeks old) were divided into two groups, a sedentary (S, n = 10) or exercise (E, n = 11) group. The rats in the E group performed climbing exercise training for 3 weeks. The protein, total lipid and glycogen levels in homogenized carcasses were measured both before and after a 3 day fast (n = 5 – 6). The body mass, a sum of the masses of the excised skeletal muscles and adipose tissues did not differ between the groups before and after the 3 day fast. The difference in the mean body mass before and after the 3 day fast was similar in the S and E groups (S −54.1 vs. E −53.7 g). The difference in the mean protein level was greater in the S than the E group (S −20.1 vs. E −15.6 kcal), while the difference in total lipids was lower in the S than the E group (S −82.7 vs. E −116.3 kcal). Glycogen decreased comparably between the groups (S −0.5 vs. E −0.6 kcal). As a result, the decrease in the energy stored in the body after the 3 day fast was lower by 22% in the S group than in the E group (S −103.3 vs. E −132.5 kcal). Exercise training before body mass reduction may therefore be associated with a smaller decrease in lean body tissues and a greater decrease in adipose tissues.