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  • Title: The effect of a hypocaloric diet with and without exercise training on body composition, cardiometabolic risk profile, and reproductive function in overweight and obese women with polycystic ovary syndrome.
    Author: Thomson RL, Buckley JD, Noakes M, Clifton PM, Norman RJ, Brinkworth GD.
    Journal: J Clin Endocrinol Metab; 2008 Sep; 93(9):3373-80. PubMed ID: 18583464.
    Abstract:
    CONTEXT: In overweight women with polycystic ovary syndrome (PCOS), the benefits of the addition of exercise to an energy-restricted diet in further improving cardiometabolic risk factors and reproductive function has not been extensively studied. OBJECTIVE: The objective was to evaluate the effects of aerobic and aerobic-resistance exercise when combined with an energy-restricted high protein diet (5000-6000 kJ/d) on metabolic risk factors and reproductive function in women with PCOS. DESIGN AND SETTING: A 20-wk outpatient, randomized, parallel study was conducted in a metropolitan research clinic. PATIENTS AND INTERVENTION: Ninety-four overweight and obese women with PCOS (age 29.3 +/- 0.7 yr; body mass index 36.1 +/- 0.5 kg/m2) were randomized to diet only (DO; n = 30), diet and aerobic exercise (DA; n = 31), or diet and combined aerobic-resistance exercise (DC; n = 33). MAIN OUTCOME MEASURES: Weight, body composition, cardiometabolic risk factors, hormonal status, menstrual cyclicity, and ovulatory function were assessed. RESULTS: All interventions reduced weight (DO 8.9 +/- 1.6%, DA 10.6 +/- 1.7%, and DC 8.7 +/- 1.7%; P < 0.001) with no difference between treatments (P = 0.7, time x treatment). Fat mass decreased more (3 kg) and fat-free mass decreased less (2 kg) in DA and DC compared with DO (P < or = 0.03). Reductions in blood pressure (5.6/2.7 mm Hg), triglycerides (0.4 mmol/liter), total cholesterol (0.5 mmol/liter), low-density lipoprotein cholesterol (0.1 mmol/liter), glucose (0.2 mmol/liter), fasting insulin (4.3 mIU/liter), testosterone (0.4 nmol/liter), and free androgen index (2.8) (P < 0.001) and improvements in SHBG (7.0 nmol/liter) and reproductive function occurred in all groups, with no difference between treatments. CONCLUSION: In overweight and obese women with PCOS, the addition of aerobic or combined aerobic-resistance exercise to an energy-restricted diet improved body composition but had no additional effect on improvements in cardiometabolic, hormonal, and reproductive outcomes relative to diet alone.
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