Effects of eight weeks of resistance training on the risk factors of metabolic syndrome in overweight/obese women - "A Pilot Study"

Background: The purpose of the present study was to examine the effects of eight weeks of resistance training (RT) on anthropometric, cardiovascular and biochemical risk factors of metabolic syndrome (MetS), and neuromuscular variables on overweight/obese women. Methods: Fourteen middle-aged (33.9 +/- 8.6 years) overweight/obese women (body mass index - BMI 29.6 +/- 4.1 kg/m(2)) underwent 24 sessions (3 times/week) of a whole body RT program with 3 sets of 8-12 repetitions maximum (RM). The following variables were evaluated: maximum strength on chest press and frontal lat pull-down; isometric hand-grip strength; biceps brachii (BB) and rectus femoris (RF) muscle thickness, body mass; BMI; body adiposity index (BAI); waist, hip and neck circumferences; visceral fat volume; blood glucose; glycated hemoglobin (HbA1c); insulin; HDL-C and triglycerides. Results: There was an increase of chest press (from 52.9 +/- 9.7 to 59.8 +/- 7.7 kg; P = 0.02) and front lat pull-down (from 51.5 +/- 7.5 to 57.6 +/- 9.2 kg; P = 0.01) muscle strength, isometric handgrip (P = 0.02) and RF muscle thickness (from 42.2 +/- 8.5 to 45.1 +/- 7.3 mm; P = 0.02) after the 8 week RT program. There were no statistically significant alterations on plasma glucose, HbA1c, insulin, triglycerides, HDL-C, anthropometric indexes and BB muscle thickness (p > 0.05). Conclusions: A RT program without caloric restriction promotes an increase on muscle thickness and strength, with no effects on risk factors of MetS in overweight/obese women.