Efekti treninga sa opterećenjem pri nestabilnim uslovima na parametre mišićne kontrakcije

Abstract

The aim of this research was to evaluate the effects of eight weeks of specifically designed resistance training in unstable conditions on the parameters of muscle contraction. The sample consisted of 75 male subjects divided into three equal groups. The recruited participants had no previous experience with training in unstable conditions, as well as significant experience in previous resistance training. The first experimental group consisted of participants who in addition to their usual daily physical activities (DPA) were involved in programmed resistance training in unstable conditions. The second experimental group consisted of participants who in addition to their usual DPA were involved in resistance training in stable conditions. The control group consisted of participants who only took part in their usual DPA without any form of resistance training. The research included bench press and squat exercises, performed with a barbell, with a previously established load of 50% of one repetition maximum (1RM). The unstable conditions were enabled by a Swiss ball for the bench press, while barbell squats were performed on a BOSU ball. The five parameters of muscle contraction were evaluated: one-repetition maximum, force, power, velocity and distance of movement of the barbell. The results show that resistance training in unstable conditions is more efficacious tool for increasing values of the parameters of muscle contraction in relation to resistance training in stable conditions. However, resistance training with a previously established 50% of 1RM in unstable conditions cannot be recommended as an effective method for increasing maximum muscle force.