Abstract
Background. Few studies have demonstrated that different combinations of calorie restriction (CR) and aerobic exercise training improved aerobic capacity (Redman et al., 2007; Weiss et al., 2017) but did not change muscle strength (Weiss et al., 2017) in adult overweight subjects. However, the effect of six-month program combined of moderate intensity aerobic exercise (150 min/week) and 12.5% of CR on aerobic capacity and muscle strength remains unclear.The aim of the present study was to estimate the effect of a six-month aerobic exercise with CR program on muscle strength and aerobic capacity in middle-aged, overweight and obese women.Methods. Twenty-six overweight and obese sedentary women (36–56 years of age, body mass index (BMI) 25.0–37.5 kg/m2) were recruited and randomly allocated to either control or experimental aerobic exercise with CR program group for six-month period. Changes in handgrip strength, knee extension and flexion strength and aerobic capacity (VO2peak) were measured.Results. Absolute peak VO2 (P < 0.001) and normalized peak VO2 (P = 0.013) significantly increased after the aerobic exercise with CR program. A greater normalized peak VO2 (P < 0.001) was observed after the aerobic exercise and CR intervention compared with the control group. However, no effect was estimated on muscle strength in this study.Conclusions. The combined 6-month aerobic exercise with CR program improved the aerobic capacity in middle-aged, overweight and obese women, but had no effect on isometric and isokinetic strength.Keywords: diet; physical exercise; obesity; muscle; cardiovascular fitness.
Highlights
Obesity rates worldwide have already reached alarming rates and almost one third of the whole population is currently classified as overweight or obese (Global Burden of Disease Study, 2015)
No effect was estimated on muscle strength in this study
Weight loss induced by calorie restriction (CR) in overweight individuals includes effects such as a decrease in lean mass and a reduction in absolute aerobic capacity, which can be prevented by exercise (Larson-Meyer et al, 2010; Weiss et al, 2017)
Summary
Obesity rates worldwide have already reached alarming rates and almost one third of the whole population is currently classified as overweight or obese (Global Burden of Disease Study, 2015). Weight loss induced by calorie restriction (CR) in overweight individuals includes effects such as a decrease in lean mass and a reduction in absolute aerobic capacity, which can be prevented by exercise (Larson-Meyer et al, 2010; Weiss et al, 2017). It is well established, that exercise-training programs can reduce the body weight, and more importantly provoke fat tissue (Ross, Bradshaw, 2009), preserve skeletal muscle mass (Villareal et al, 2011) and improve aerobic capacity (Bouchonville et al, 2014). The aim of the present study was to estimate the effect of a six-month aerobic exercise with CR program on muscle strength and aerobic capacity in middle-aged, overweight and obese women
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