Generally, the enhancement of physical fitness depends on the optimal modulation of different physiological, technical or psychological stimuli and within the factors the would contribute to a decrease performance level, obesity is one of them. In this context, ample evidence shows that obesity is associated with an augmented cardio-metabolic risk, lowered postural control, functional performance and strength-related variables. International guidelines suggests to counteract obesity to respect a minimum dosage of 150 min a week of physical activity at moderate intensity performed with resistance training exercises with a frequency of 2-3 days/week. However, in the aforementioned guidelines there is a little consideration for what concern the quality of motor execution (i.e., "how" an individual performs each movement pattern). In addition, the available literature demonstrates the effectiveness of a "movement-quality" training intervention on fitness parameters and postural control, compared to a mere conventional exercise, in normal-weight individuals . In account to this, the purpose is to evaluate whether a quality of movement protocol would be more effective than a traditional strength training exercise in improving postural control and fitness parameters in subjects with obesity.

Inclusion Criteria:

• physical activity frequency at least 1 days per week
• BMI index more than 30 kg/m2
• informed consent signature

Exclusion Criteria:

• aged more than 70 years
• patients with knee pain (Visual Analogue Scale > 7 a.u.)
• history of hip or knee replacement
• severe hip or knee osteoarthrosis
• cardiac or neurological condition contraindicating physical activity