Change in Physical Activity Indices in Terms of Using Different Models of Training Sessions in Power Fitness

The paper presents the results of determining the peculiarities of changing the physical exercise parameters in power fitness in the conditions of prolonged usage of different intensity training models during training. We examined 50 physically healthy, untrained young men aged 19 ± 1.1. Participants were divided into 2 experimental groups. Different training sessions ("A" and "B") were developed for representatives of groups 1 and 2. Training sessions differed from each other by the power load magnitude. We used an integral method of estimating the magnitude of the load to determine the peculiarities of changing the data indicators in the proposed conditions of muscle activity. In the course of 3-month training, the indicators of maximum muscle strength (1 PM) in group 1 participants increased on average by 30.3% (p <0.05), while the other group showed the increase by 49.3% (p <0,05) compared with the initial data. The relevant significant difference was found during the control of the parameters of the projectile's working mass (m) during 3 months of power fitness occupation. Thus, in boys of group 2, this indicator increased by 23.5% (p <0.05) compared to the positive results demonstrated by group 1 representatives for the same period of time. Despite the positive positive dynamics, the indicator of the volume of workload in the working network (Wn) in the group 2 representatives was almost 129.7% (p <0.05) lower than the results of their opponents, both in the beginning and in the end of the study. The following factors were proved to contribute to the increase of the intensity of loads and significantly reduce the amount of training work in the process of the training: reduction of rest periods between the sets, the reduction of the number of repetitions in a separate set and the doubling of the duration of the concentric and eccentric phases of the movement. Thus, the obtained results indicate that the use of training programs with high intensity loads in training processes contributes to more pronounced adaptive changes in the body of the examined participants in the process of power fitness training.