The use of information technology and communications, have allowed the development of multiple devices for recording electrical activities that originate in the human body such as electrocardiogram, electromyography, electroencephalography signals, among others; They have also allowed the commercialization of low-cost devices that can be used for sophisticated Virtual Reality applications. In the process of recovering the mobility of the lower limbs, important problems arise, such as being able to recover muscular capacity, coordination of gait and mainly the loss of fear of being able to walk normally, which is why one of the Exercises to work these three problems is to perform the exercises on an exercise bike, in these conditions the patient performs it in most cases very distracted, which causes him not to perform the exercise normally, this article presents a technique to evaluate the cerebral conditions of the patient who is in recovery, based on the analysis of the attention and meditation novels, measured when the patient performs the exercises using the stationary bicycle, using the virtual reality device based on the use of the lenses of RV, brain signal measurements are made using the MindWave EEG device Neurosky, which gives us the level of concentration and meditation that the person is on a scale of 0% to 100%, the results obtained show that when the person is doing the exercises on the bicycle they find low levels of attention and Opposite meditation happens when the patient is using the virtual reality device where you show high levels of meditation.