## 4 Discussion  
The aim of the present study was to define a coordination training program developed in IVR environments and to evaluate its effect on manual accuracy in a school population. Accuracy is a skill related to coordination abilities and is one of the main factors that affect throwing performance. It was observed that, after 8 weeks of intervention by carrying out a coordination program in IVR environments, the experimental group showed significant improvements in comparison to the control group in throwing accuracy. It is widely known that motor skills facilitate the learning of the specific technical-tactical elements of different sports disciplines [36]. In any sport modality, success is determined by a necessary mastery of motor skills [37]. The results of this research reaffirm the indications of [PERSON] et al. [38] regarding the influence of motor skill training (coordination) on the accuracy of throws. Other studies also show that coordination is an important factor in the application of the technique of each sport, as well as its effectiveness during execution [39; 40]. Our results agree with those presented in studies by [PERSON] and [PERSON] [41] as well as [PERSON] et al. [38], where, after applying training with coordination and technical activities, it was possible to improve the accuracy of passing execution. These improvements are justified by the organizational changes in the neuronal connections of the primary motor cortex, as well as by the proliferation of output pathways from the motor areas in the medial wall of the hemisphere [42]. Corticospinal neurons (CSN), which provide direct cortical outputs to the spinal cord, play a crucial role in motor control and are also involved in these improvements [43]. Strength, understood as the basis of all bodily dynamism and the main source of movement, will be present in any type of motor activity or movement, such as using the arm to throw a ball in one direction. Developing muscle power is a crucial element of training to improve the accuracy of a throw [44]. The results obtained in the strength values are positive, with significant differences being found for the experimental group compared to the control group. Similar results were found by [PERSON] et al. [45] as well as [PERSON] and [PERSON] [46], who affirm that through coordination training the maximum and explosive strength of the lower limbs can be improved. [PERSON] and [PERSON] [26] state that in general terms explosive strength, or the ability to quickly express a force, is related to muscular coordination. [PERSON] [47] concludes that intermuscular and intramuscular coordination have a great influence on the development of strength and are the main factors that lead to improvements in it, so if coordinated training is performed, improvements in strength levels will be perceived. This motor aspect is something that is obviously present in any type of throwing, as throwing a ball or a dart requires a minimum amount of strength, which is achieved through muscle contraction, which triggers muscle tension. [PERSON] [48] concludes that improvements in strength are essential for the performance of an accurate throw as the greater the explosive strength, the greater the throwing accuracy--these data  
Figure 4: Correlation between accuracy (pts) and upper body strength (m). agree with those obtained in our study, as the experimental group showed improvements in strength and obtained better results in throwing accuracy. Finally, regarding the basic physical capacity of movement speed, which refers to a fast and coordinated movement, it is known that coordination has a decisive impact on the speed and quality of the learning process of specific skills and techniques, such as throwing accuracy [49]. The results of this study affirm and follow this theory since, after carrying out coordination training, significant improvements were obtained in this parameter in the experimental group.