INFORMAZIONI SU
MARI Lara
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Supervisore: Prof. Lazzer |
| Background: Obesity is a common disease, the main causes of which include reduced physical activity and increased caloric intake. Treatment consists of lifestyle modification through increased structured physical activity, nutritional interventions and behavioral changes. The combination of a high volume of moderate intensity continuous training (MICT) with a low volume of high intensity interval training (HIIT) leads to significant improvements in body composition and physical performance in people with obesity. In the current scientific literature, there are only a few studies comparing different combinations of aerobic training with and without strict dietary control over a longer period of time (i.e. ˃12 weeks) with a control group. Thus, the aim of the present study is to compare the effects of two types of physical activity “polarized training (POL) and HIIT”, two types of nutritional interventions “Intermittent Energy Restriction (IER 5:2) and Continuous Energy Restriction (CER)” and the combination of POL and IER 5:2 on body composition, physical performance, blood and muscle parameters. Then aim of this study is to elucidate the independent and combined role of diet and exercise in improving the physical characteristics of people with obesity. Methods: 150 male adults with obesity [body mass index (BMI) > 30 kg m-2; age between 20 and 40 years; moderately physically active] will be recruited. The project comprises 6 groups of 25 participants each. The first two groups will engage in physical activity, with the POL group following a weekly training distribution in which 70-80% of the training volume is performed at an intensity below the first ventilatory threshold (VT1), 5-10% between the two ventilatory thresholds and the remaining 10-15% of the training at an intensity above the second ventilatory threshold (VT2), while the HIIT group follows a weekly training distribution in which 40-50% of the training volume is performed below VT1 and the remaining 50% is evenly distributed between VT1 and an intensity close to the maximum oxygen uptake (V’O2max). The other two groups focus on diet, with the CER group experiencing a continuous energy restriction of 25% of daily energy intake per day, while the IER group experiences a restriction of 75% of daily energy intake only two days per week. The remaining group is a control group that only receives advice on diet and physical activity. Results: We expect weight reduction in all groups except the control group. We expect greater weight loss in the diet groups but less improvement in exercise capacity. In contrast, we expect a better improvement in physical performance and maintenance of fat-free mass (FFM) in the exercise groups. In addition, we expect better results in body composition and physical abilities in the combined “diet and exercise group”. |
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