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The Journal of Sports Medicine and Physical Fitness 2016 Jul 06

lingua: Inglese

Circuit resistance training in women with normal weight obesity syndrome: body composition, cardiometabolic and echocardiographic parameters, and cardiovascular and skeletal muscle fitness

Fabiano C. FERREIRA 1, Danilo R. BERTUCCI 1, Marina R. BARBOSA 1, João E. NUNES 2, João P. BOTERO 3, Maria F. RODRIGUES 1, Gilberto E. SHIGUEMOTO 1, Valdir SANTORO 4, Ana C. VERZOLA 4, Rodrigo O. NONAKA 4, Roberto M. VERZOLA 1, 4, Vilmar BALDISSERA 1, Sérgio E. PEREZ 1

1 Laboratory of Exercise Physiology, Department of Physiological Sciences, Federal University of São Carlos, São Carlos, São Paulo, Brazil; 2 Faculty of Physical Education and Physiotherapy, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil; 3 Department of Human Movement Sciences, Federal University of São Paulo, Santos, São Paulo, Brazil; 4 Echocardiography Unit Ltda., São Carlos, São Paulo, Brazil


BACKGROUND: Normal weight obesity (NWO) syndrome has been characterised in subjects with normal BMI and high body fat mass percentage (BF% >30 for women) being a risk factor for cardiometabolic dysregulation and cardiovascular mortality. This study evaluated whether circuit resistance training (CRT) improves body composition, heart size and function, cardiometabolic parameters, and cardiorespiratory, cardiovascular and skeletal muscle fitness in women with NWO.
METHODS: Data are means [95% Confidence Interval]. Twenty-three women participated: ten NWO-CRT (baseline: BMI= 22.4[21.4-23.3] kg/m2; BF%= 44.5[41.0-48.0]%) performed CRT; and thirteen untrained NWO-control (baseline: BMI= 21.7[20.8-22.7] kg/m2; BF%= 37.8[34.6-41.1]%). At baseline and after ten weeks were performed/measured dual-energy X-ray absorptiometry, echocardiography, blood tests, arterial pressure, exercise testing, and total-overload-by-training-session (TOL).
RESULTS: At baseline, the NWO-CRT exhibited larger body fat mass (BF) (27.28[23.9-30.6] kg) than NWO-control (22.41[19.5-25.3] kg) (p=0.0227). After training, NWO-CRT: reduced 8 kg of BF (p= 0.000002); became BF% lower than NWO-control (33.1[30.1-36.0] < 37.0[34.3-39.6]%, p= 0.0423), with 30% of NWO-CRT subjects becoming without-obesity; reduced 3 kg in trunk fat mass (p= 0.000005); showed fasting glucose (72.8[69.4-76.2] mg/dl) smaller than NWO-control (81.7[78.6-84.8] mg/dl) (p= 0.004); increased TOL (5,087.5[4,142.5-6 032.5] to 6,963.3[6,226.4-7,700.2] rep.kg, p= 0.0004); increased load at VO2peak (122.5[106.8-138,2] to 137.5[118.18-156.82] W, p= 0.0051); reduced double product/load at VO2peak ratio (277.4[222.1-332.8] to 237.7[194.2-281.2] mmHg.bpm/W, p= 0.0015); and increased left ventricular mass/body surface area ratio (84.29[78.98-89.6] to 90.29[81.45-99.12] g/m2, p= 0.0215).
CONCLUSION: CRT reduced BF% and generated cardiometabolic, cardiac, skeletal muscle and cardiovascular benefits, being a useful strategy to combat the normal weight obesity syndrome in women.

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