Mobile learning (mLearning) is now being increasingly used in university education, with positive impacts on the motivation and predisposition of students when learning. The aim of this study was to evaluate the impact of the use of mobile applications as a learning resource in applied biomechanics, with regard to attitudinal variables (interest, motivation, applicability and learning experience) and its efficacy in the learning of general physics contents. A quasi-experimental design was proposed, with the random assignment of participants to experimental and control groups, with the post-trial measurement of a sample of 76 university students studying Applied Biomechanics, who were given an ad-hoc questionnaire in order to evaluate attitudinal aspects, as well as a test of knowledge. With regard to attitudinal aspects, higher scores were observed among the group which used the applications as learning instruments (the experimental group) when evaluating their interest in biomechanics (t = 2.79; p < 0.05; d = −0.641), the applicability of the applications in real life (t = 7.34; p < 0.001; d = −1.687) and the general evaluation of the practical sessions (t = 6.45; p < 0.001; d = −1.481). At the conceptual level, significant differences were observed in the contents worked on with the KinematicLab Jump© application. Our results show the positive effect of the use of applications on important attitudinal aspects in the learning of university students, without any relevant effect on the acquisition of conceptual learning.

Introduction: This study describes the theoretical foundations of the development of an equation that allows for the estimation of the mobilized load when training with suspension devices (type TRX®) and presents a mobile application as a means for its use. Methods: Systems of equations are proposed of which the terms depend on the angulation of the device with respect to the vertical (angle α), the relationship between the height of grip, the height of the center of mass and the weight of the subject, which are recorded from a photo. Results: Based on the photo and the subject’s standing height, the application allows the user to measure the angle α, providing the values of applied force (in N) and mobilized load in relation to the percentage of body mass, applying the calculations described in our equations. The equation also provides the estimated value of the load mobilized during a push up on the floor (68% of the subject’s body mass) and the equation for the calculation of the mobilized load when the suspension device is fixed to the feet. Conclusions: It is possible to use equations to estimate the load mobilized in each repetition during training using suspension devices and to implement this algorithm in a mobile application.

La terapia protones es la forma más común de radioterapia con partículas pesadas y en los últimos años ha captado la atención pública debido a las expectativas generadas sobre su eficacia y a la expansión de centros especializados por diferentes países, incluida España. Este trabajo revisa las propiedades físicas de la terapia con protones, su evolución histórica, sus ventajas e inconvenientes, técnicas de aplicación y evidencias de efectividad clínica comparada la radioterapia de fotones. El interés en el uso de protones se debe a su comportamiento dosimétrico, que permite una mejor distribución de la dosis en la zona a tratar, una menor irradiación de los órganos críticos de riesgo y tejidos colindantes y, en consecuencia, una menor toxicidad. Mientras que la principal desventaja se relaciona con la incertidumbre que existe en la estimación del pico de Bragg. Para la conformación del haz de protones se recurre a dos sistemas, uno pasivo (PSPT), más antiguo, y otro activo en el que los protones son dirigidos magnéticamente sobre la zona de tratamiento (PBS); es sobre este último, sobre el que se están introduciendo sistemas que mejoran la precisión de la irradiación sobre el volumen tumoral (IMRT, SFUD). Actualmente, la protonterapia no ha demostrado ser un tratamiento más eficaz y seguro que la terapia con fotones para la mayoría de los tipos de tumores sólidos estudiados, si bien, la terapia con protones ha proporcionado mejores resultados en determinados aspectos evaluados para el meduloblastoma y algunos tumores pediátricos del sistema nervioso central, los tumores de la base del cráneo y el melanoma uveal. El consenso general es que existe la necesidad de realizar ensayos aleatorios y recopilar datos de resultados multicéntricos para demostrar inequívocamente la ventaja de los protones.

UNSTRUCTURED After carrying out a bibliographic review of the different ways of estimating the load during suspension training, this study describes the theoretical foundations of the development of a mobile phone application (Kinematic lab susp) that allows estimating the load mobilized when training with devices in suspension (type TRX ®). Methods: systems of equations are proposed whose terms depend on the angulation of the device with respect to the vertical (angle α), the relationship between the height of grip and the height of the center of mass, and the weight of the subject that are recorded by means of a photograph. Results: after taking a photograph and incorporating the height of the subject, the application allows measuring the angle α, providing values of applied force (in N) and mobilized load in relation to the percentage of body mass applying the calculations described in our equations. The study also provides the estimated value of the load mobilized during a push on the floor (68% of the subject's body mass) and the equation for the calculation of the mobilized load when the suspension device is fixed to the feet. Conclusions: it is possible to estimate by means of equations the load mobilized in each repetition during the training by suspenesion devices. Kinemtaic lab susp is the first mobile app that allows this calculation to be made from the taking of a photograph.

Introduction: power measurement in sports is essential to enhance performance, but technological and economic limitations hinder its application in Paralympic contexts. Objective: to develop and validate a power estimation method for wheelchair athletes, particularly during training on roller benches, without the need for expensive devices. Methodology: coast-down tests were carried out on track and roller bench at different speeds (10, 15 and 20 km/h), measuring stopping distance and acceleration. Drag force, power, and handrim effort were calculated using vehicle dynamics equations. Results: track values deviated only 3.8% from accelerometer data, validating the method. On roller benches, values matched those of track up to 12 km/h; at higher speeds, aerodynamic resistance caused noticeable deviations. Discussion: findings align with previous studies on rolling resistance and wheelchair dynamics. The methodology allows realistic representation of effort during training. Conclusions: a cost-effective and reliable solution for power estimation in Paralympic athletes is provided, with direct applications in training planning.

Objective: to examine the concordance between estimated power output, blood lactate concentration, and triceps brachii electromyographic (EMG) activity in a T54 elite athlete during an incremental roller ergometer test; Methods: a female T54 competitor performed a maximal incremental protocol on a calibrated roller ergometer. Surface EMG of the triceps brachii and capillary blood lactate concentration were recorded. Mechanical power was estimated through a coast-down modelling approach; Results: simultaneous inflection points in EMG amplitude and lactate concentration were observed at 20 km/h, coinciding with a steep increase in mechanical demand; Discussion: the strong agreement between estimated mechanical output and internal physiological markers reinforces the potential of roller-based assessments for identifying neuromuscular and metabolic thresholds during upper-limb propulsion tasks; Conclusions: indirect power estimation on roller ergometers provides a valid and accessible alternative for individualized load prescription in adapted sport, supporting the integration of physiological testing tools into performance monitoring of athletes with disabilities