Relationship between CMJ and change of direction in collective sports

En la ejecución de una carrera a máxima velocidad con cambio de dirección observamos una alta participación de componentes de fuerza. Dichos componentes vienen siendo entrenados de forma específica, como por ejemplo a través de la pliometría. Pocos estudios valoran la fuerza explosiva y reactiva de forma unilateral y su correlación con las carreras cortas de aceleración con cambios de dirección. Según los resultados de los trabajos revisados, nuestro propósito es conocer la relación entre medidas de fuerza-explosiva y fuerza reactiva, con carreras cortas de aceleración con cambios de dirección, para determinar si la manifestación de fuerza con un salto con contramovimiento (CMJ) predice el rendimiento en carreras cortas de aceleración con cambios de dirección de 90º

Efectos del desentrenamiento sobre los valores antropométricos en jóvenes futbolistas

When executing a race at full speed with change-of-direction force components are highly involved. These components are being specifically trained through plyometric exercises, among others. Few studies evaluate on one side explosive and reactive strength (1,2) and their correlation with short change-of-direction sprints. Once analyzed the evidences showed in some studies reviewed (3,4,5,6,7), our purpose is to determine the relationship between both explosive and reactive strength measures and short change-of-direction sprints in order to find whether the countermovement jump (CMJ) force manifestation helps predicting the performance level during change-of-direction 90º acceleration sprints.El desentrenamiento ha sido definido (Mújika et al., 2001a) como pérdida parcial o completa de las adaptaciones fisiológicas, anatómicas y del rendimiento conseguido con el entrenamiento y como una consecuencia de la reducción o suspensión del proceso de entrenamiento. Con este estudio pretendemos evaluar la influencia del desentrenamiento sobre las variables antropométricas en jóvenes futbolistas (13-15 años). Los resultados nos muestran que las variables antropométricas son una herramienta exacta evaluable en futbolistas en formació

Relación entre el CMJ y cambios de dirección en deportes colectivos

When executing a race at full speed with change-of-direction force components are highly involved. These components are being specifically trained through plyometric exercises, among others. Few studies evaluate on one side explosive and reactive strength (1,2) and their correlation with short change-of-direction sprints. Once analyzed the evidences showed in some studies reviewed (3,4,5,6,7), our purpose is to determine the relationship between both explosive and reactive strength measures and short change-of-direction sprints in order to find whether the countermovement jump (CMJ) force manifestation helps predicting the performance level during change-of-direction 90º acceleration sprints.En la ejecución de una carrera a máxima velocidad con cambio de dirección observamos una alta participación de componentes de fuerza. Dichos componentes vienen siendo entrenados de forma específica, como por ejemplo a través de la pliometría. Pocos estudios valoran la fuerza explosiva y reactiva de forma unilateral (1,2) y su correlación con las carreras cortas de aceleración con cambios de dirección. Según los resultados de los trabajos revisados, (3,4,5,6,7) nuestro propósito es conocer la relación entre medidas de fuerza-explosiva y fuerza reactiva, con carreras cortas de aceleración con cambios de dirección, para determinar si la manifestación de fuerza con un salto con contramovimiento (CMJ) predice el rendimiento en carreras cortas de aceleración con cambios de dirección de 90º

The management of acute venous thromboembolism in clinical practice. Results from the European PREFER in VTE Registry

Venous thromboembolism (VTE) is a significant cause of morbidity and mortality in Europe. Data from real-world registries are necessary, as clinical trials do not represent the full spectrum of VTE patients seen in clinical practice. We aimed to document the epidemiology, management and outcomes of VTE using data from a large, observational database. PREFER in VTE was an international, non-interventional disease registry conducted between January 2013 and July 2015 in primary and secondary care across seven European countries. Consecutive patients with acute VTE were documented and followed up over 12 months. PREFER in VTE included 3,455 patients with a mean age of 60.8 ± 17.0 years. Overall, 53.0 % were male. The majority of patients were assessed in the hospital setting as inpatients or outpatients (78.5 %). The diagnosis was deep-vein thrombosis (DVT) in 59.5 % and pulmonary embolism (PE) in 40.5 %. The most common comorbidities were the various types of cardiovascular disease (excluding hypertension; 45.5 %), hypertension (42.3 %) and dyslipidaemia (21.1 %). Following the index VTE, a large proportion of patients received initial therapy with heparin (73.2 %), almost half received a vitamin K antagonist (48.7 %) and nearly a quarter received a DOAC (24.5 %). Almost a quarter of all presentations were for recurrent VTE, with >80 % of previous episodes having occurred more than 12 months prior to baseline. In conclusion, PREFER in VTE has provided contemporary insights into VTE patients and their real-world management, including their baseline characteristics, risk factors, disease history, symptoms and signs, initial therapy and outcomes

Multi-messenger observations of a binary neutron star merger

On 2017 August 17 a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced Virgo detectors. The Fermi Gamma-ray Burst Monitor independently detected a gamma-ray burst (GRB 170817A) with a time delay of ~1.7 s with respect to the merger time. From the gravitational-wave signal, the source was initially localized to a sky region of 31 deg2 at a luminosity distance of 40+8-8 Mpc and with component masses consistent with neutron stars. The component masses were later measured to be in the range 0.86 to 2.26 Mo. An extensive observing campaign was launched across the electromagnetic spectrum leading to the discovery of a bright optical transient (SSS17a, now with the IAU identification of AT 2017gfo) in NGC 4993 (at ~40 Mpc) less than 11 hours after the merger by the One- Meter, Two Hemisphere (1M2H) team using the 1 m Swope Telescope. The optical transient was independently detected by multiple teams within an hour. Subsequent observations targeted the object and its environment. Early ultraviolet observations revealed a blue transient that faded within 48 hours. Optical and infrared observations showed a redward evolution over ~10 days. Following early non-detections, X-ray and radio emission were discovered at the transient’s position ~9 and ~16 days, respectively, after the merger. Both the X-ray and radio emission likely arise from a physical process that is distinct from the one that generates the UV/optical/near-infrared emission. No ultra-high-energy gamma-rays and no neutrino candidates consistent with the source were found in follow-up searches. These observations support the hypothesis that GW170817 was produced by the merger of two neutron stars in NGC4993 followed by a short gamma-ray burst (GRB 170817A) and a kilonova/macronova powered by the radioactive decay of r-process nuclei synthesized in the ejecta