Skip Navigation LinksHome > August 2014 - Volume 21 - Issue 8 > Additive effects of isoflavones and exercise training on inf...
doi: 10.1097/GME.0000000000000177
Original Articles

Additive effects of isoflavones and exercise training on inflammatory cytokines and body composition in overweight and obese postmenopausal women: a randomized controlled trial

Lebon, Johann MSc1,2; Riesco, Eleonor PhD1,2; Tessier, Daniel MD1,3; Dionne, Isabelle J. PhD1,2

Collapse Box


Objective: Isoflavones and exercise have been shown to affect C-reactive protein (CRP) and body composition and to act synergistically on trunk and total fat mass (FM), glucose metabolism, and lean body mass in postmenopausal women with a body mass index higher than 25 kg/m2. We hypothesized that exercise and isoflavone supplementation (Ex + ISO) could reduce inflammation in the same subpopulation of women. The objective of this study was to investigate if 6 months of mixed exercise combined with isoflavones could have greater effects on specific inflammatory markers than exercise alone in overweight or obese postmenopausal women.

Methods: Thirty-four postmenopausal women aged 50 to 70 years were randomly assigned to exercise and placebo (Ex + PLA; n = 15) or Ex + ISO (n = 19). At baseline and after 6 months, waist circumference, hip circumference, total FM, trunk FM, leg FM, and muscle mass index (MMI; = total fat free mass [kg] / height2 [m]) were assessed (dual-energy x-ray absorptiometry). Inflammatory markers (CRP, tumor necrosis factor-α [TNF-α], and interleukin-6) were obtained by enzyme-linked immunosorbent assay. T tests were used to compare groups at baseline.

Results: The Ex + PLA group showed significant changes in MMI (+0.33 kg/m2, P ≤ 0.009) and FM compartments (waist circumference, −5.13 cm; % FM, −1.31%; P ≤ 0.001), whereas inflammation remained unchanged. However, the Ex + ISO group showed significant changes in total FM (−1.70 kg, P < 0.0001), FM compartments (hip circumference [−2.51 cm, P = 0.019], leg FM [−1.16 kg, P = 0.037], and trunk FM [−0.72 kg, P = 0.006]), MMI (+0.39 kg, P = 0.011), and inflammation (CRP, −1.14 mg/L, P = 0.029; TNF-α, +0.29 pg/mL, P = 0.010).

Conclusions: Despite an increase in TNF-α, the use of isoflavones—when body weight remains stable—seems to enhance the beneficial effects of mixed-exercise training on body composition and CRP in overweight or obese postmenopausal women.

© 2014 by The North American Menopause Society.


Article Tools


Article Level Metrics

Search for Similar Articles
You may search for similar articles that contain these same keywords or you may modify the keyword list to augment your search.