Optimización del salto vertical en base al perfil individual de fuerza-velocidad: un estudio de caso

Objetivos:El objetivo de este trabajo es aumentar el rendimiento en el salto de un sujeto (19 años,187cm, 88 kg) a través de una reducción en su desequilibrio en el perfil fuerza-velocidad (perfil F-V).Metodología: El sujeto realizó un test para obtener su perfil F-V y su desequilibrio en el perfil F-V. El desequilibrio es utilizado como criterio para individualizar el programa de entrenamiento. Este programa de entrenamiento durará 9 semanas y está basado en el programa diseñado por Pedro Jiménez-Reyes que ha demostrado una alta eficacia en la optimización del salto vertical. (1,2). En este programa se individualizan los objetivos y contenidos de entrenamiento según el desequilibrio en el perfil F-V que presente el sujeto. En el test inicial el sujeto presentó un déficit de fuerza del 57.8% en su desequilibrio, por lo que fue asignado al grupo de entrenamiento de déficit alto de fuerza. Durante la realización del programa se realizan evaluaciones periódicas para reorientar el programa de entrenamiento según la evolución del desequilibrio en el perfil F-V.Resultados:El desequilibrio F-V se redujo en un 37.26% hasta presentar un perfil F-V óptimo (desequilibrio en perfil F-V Conclusiones:La intervención ha cumplido los objetivos establecidos ya que el sujeto ha experimentado adaptaciones positivas en el perfil F-V y en la potencia y altura manifestada en cada salto. Este estudio reafirma la eficacia de un programa de entrenamiento individualizado en base al perfil F-V, siendo este perfil individual F-V una variable que debe ser monitorizada en los procesos de optimización del rendimiento.<br /

Síntomas de ansiedad y depresión en competidoras de deportes gimnásticos durante la adolescencia.

La práctica deportiva durante la adolescencia se ha asociado con la mejora de numerosos parámetros de salud física, siendo mas confusa la relación con parámetros de salud mental. Especialmente, algunos estudios sugieren que un volumen de entrenamiento elevado puede asociarse con mayores síntomas de ansiedad y depresión, pero esto requiere confirmarse con un mayor número de estudios. Especial atención requieren las deportistas que compiten al máximo nivel en deportes gimnásticos donde los trastornos de ansiedad y depresión pueden verse incrementados en asociación con los trastornos alimenticios. El objeto de este estudio es determinar si las deportistas que compiten en deportes gimnásticos tienen mayores síntomas de ansiedad que las practicantes en otros deportes. <br /

The rise of brand journalism

There are few commercial communication concepts that have had a rise as spectacular and fast as brand journalism. Brands' journalistic activities were usually considered under the category of content marketing and are also sometimes described using terms such as custom content, content publishing or corporate journalism. Although corporate journalism is an old practice, its development in digital environments has elevated it to a new dimension. Today, as a matter of fact, there are few large corporations or brands that resist the urge to start initiatives in the field: brand journalism seems like a modern marketing imperative. This chapter tries to clarify the conceptual nature of brand journalism, given its growing importance. First, it explains the different factors that contributed to its rise. Then it analyzes its various forms along with some keys to its use by corporations. Finally, the effects of brand journalism in terms of audience engagement, and its contribution to the tension between information and misinformation in markets, are evaluated and future developments assessed

Exercise addiction risk and health in male and female amateur endurance cyclists

To determine the relationship between the risk of exercise addiction (REA) and health status in amateur endurance cyclists. Methods In 859 (751 men and 108 women) cyclists and 718 inactive subjects (307 men and 411 women), we examined the REA (Exercise Addiction Inventory), training status (volume, frequency, experience, and performance), socioeconomic status, quality of life (QoL) (SF-12), quality of sleep (Pittsburgh Sleep Quality Index), anxiety and depression (Hospital Anxiety and Depression Scale), and cardiometabolic risk: body mass index, physical activity (International Physical Activity Questionnaire), physical condition (International Fitness Scale), adherence to the Mediterranean diet (Mediterranean Diet Adherence Screener), alcohol and tobacco consumption. Results In total, 17% of the cyclists showed evidence of REA and 83% showed low REA. REA occurred independent of age, sex, training, and socioeconomic status (all ps > .05). Regardless of REA, the cyclists displayed a better physical QoL and a lower cardiometabolic risk than the inactive subjects (all ps < .05). The cyclists with REA displayed worse values of mental QoL, quality of sleep, and anxiety than cyclists with low REA (all ps < .05). The REA group had better values of mental QoL and anxiety and similar values of quality of sleep than the inactive subjects. The differences in mental QoL between the REA and low REA groups were significantly greater in women (p = .013). There was no Addiction × Sex interaction in the other analyzed variables. Conclusion Our results suggest that an increased prevalence of REA limits the benefits that amateur endurance cycling has on mental health and quality of sleep

Flexible Hybrid Circuit Fully Inkjet-Printed: Surface Mount Devices Assembled by Silver Nanoparticles-Based Inkjet Ink

Nowadays, inkjet-printed devices such as transistors are still unstable in air and have poor performances. Moreover, the present electronics applications require a high degree of reliability and quality of their properties. In order to accomplish these application requirements, hybrid electronics is fulfilled by combining the advantages of the printing technologies with the surface-mount technology. In this work, silver nanoparticle-based inkjet ink (AgNP ink) is used as a novel approach to connect surface-mount devices (SMDs) onto inkjet-printed pads, conducted by inkjet printing technology. Excellent quality AgNP ink-junctions are ensured with high resolution picoliter drop jetting at low temperature (∼150 °C). Electrical, mechanical, and morphological characterizations are carried out to assess the performance of the AgNP ink junction. Moreover, AgNP ink is compared with common benchmark materials (i.e., silver epoxy and solder). Electrical contact resistance characterization shows a similar performance between the AgNP ink and the usual ones. Mechanical characterization shows comparable shear strength for AgNP ink and silver epoxy, and both present higher adhesion than solder. Morphological inspections by field-emission scanning electron microscopy confirm a high quality interface of the silver nanoparticle interconnection. Finally, a flexible hybrid circuit on paper controlled by an Arduino board is manufactured, demonstrating the viability and scalability of the AgNP ink assembling technique

Low-cost fabrication of printed electronics devices through continuous wave laser-induced forward transfer

Laser induced forward transfer (LIFT) is a direct-writing technique that allows printing inks from a liquid film in a similar way to inkjet printing but with fewer limitations concerning ink viscosity and loading particle size. In this work we prove that liquid inks can be printed through LIFT by using continuous wave (CW) instead of pulsed lasers, which allows a substantial reduction in the cost of the printing system. Through the fabrication of a functional circuit on both rigid and flexible substrates (plastic and paper) we provide a proof-of-concept that demonstrates the versatility of the technique for printed electronics applications

Laser-induced forward transfer for printed electronics applications

Laser-induced forward transfer (LIFT) is a printing technique based on the action of a laser pulse that is focused on a thin film of a precursor ink for getting the transfer of a droplet onto a receiver substrate. The experiments presented in this article aim to demonstrate the ability of LIFT to produce electronic circuits on paper, a substrate that is flexible, cheap and recyclable. Tests were conducted in order to study the printing of conductive tracks with an Ag ink. The printing of a suspension of carbon nanofibers (CNFs) was also studied in order to demonstrate the ability of LIFT for printing inks with particles with some microns in size that provoke inkjet nozzles to clog. As a proof-of-concept of the LIFT possibilities, both inks were used to print entirely by LIFT a functional humidity sensor on a piece of paper. All the LIFT experiments were performed with a Nd:YAG laser that delivers pulses of a few hundreds of ns in an attempt to approach the technique to laser systems that are already introduced in many production lines for marking and labeling

Assessment of <i>TLL1 </i>variant and risk of hepatocellular carcinoma in Latin Americans and Europeans

Introduction and Objectives: Tolloid like protein 1 (TLL1) rs17047200 has been reported to be associated with HCC development and liver fibrosis. However, to our knowledge, no studies have been performed on Latin Americans and comparative differences between TLL1 rs17047200 in HCC patients from Latin America and Europe are undefined. Materials and Methods: Cross-sectional analysis performed on Latin American and European individuals. We analyzed TLL1 rs17047200 on DNA from 1194 individuals, including 420 patients with HCC (86.0 % cirrhotics) and 774 without HCC (65.9 % cirrhotics). Results: TLL1 rs17047200 genotype AT/TT was not associated with HCC development in Latin Americans (OR: 0.699, 95 %CI 0.456-1.072, p = 0.101) or Europeans (OR: 0.736, 95 %CI 0.447-1.211, p = 0.228). TLL1 AT/TT was not correlated with fibrosis stages among metabolic dysfunction-associated steatotic liver disease (MASLD) patients from Latin America (OR: 0.975, 95 %CI 0.496-1.918, p = 0.941). Among Europeans, alcohol-related HCC had lower TLL1 AT/TT frequencies than cirrhosis (18.3 % versus 42.3 %, OR: 0.273, 95 %CI 0.096-0.773, p = 0.015). Conclusions: We found no evidence that the TLL1 rs17047200 AT/TT genotype is a risk factor for HCC development in Latin Americans or Europeans. A larger study integrating ethnic and etiology backgrounds is needed to determine the importance of the TLL1 SNP in HCC development.</p

Fabrication, Performances and Aging of Flexible Gas Sensor Platforms

Flexible electronics are attracting much interest in gas sensor field on on-site monitoring applications due to their wear ability, lightweight and low-cost production. These performances are fully accomplished by silver-based platforms, but silver corrosion represents the main drawback for the integrity of the devices. In this work, self-heating sensor platforms fabricated by screen- and inkjet-printing techniques have been developed. The reliability of both types of sensors has been tested by long-term lifetime characterization and aging tests. These tests proved that the actuation time is interrupted by silver corrosion phenomena in screen-printing devices and by hot spots in inkjet-printing ones. Appropriate solutions regarding isolation and design improvements achieved not only an increase of lifetime and reliability, but also a decrease of power consumption

MBOAT7 rs641738 Variant Is Not Associated with an Increased Risk of Hepatocellular Carcinoma in a Latin American Cohort

Background: The rs641738 C &gt; T single-nucleotide polymorphism of MBOAT7 has been associated with hepatocellular carcinoma (HCC) and nonalcoholic fatty liver disease (NAFLD). Latin Americans have high rates of HCC and NAFLD, but no assessment between MBOAT7 and HCC has been performed in this population. Aims: We provide the first assessment of the impact of MBOAT7 on HCC risk in Latin Americans. Methods: Patients were prospectively recruited into the ESCALON network, designed to collect samples from Latin American patients with HCC in 6 South American countries (Argentina, Ecuador, Brazil, Chile, Peru, and Colombia). A European cohort and the general Hispanic population of gnomAD database were included for comparison. Associations between HCC and MBOAT7 were evaluated using logistic regression. Results:In total, 310 cases of HCC and 493 cases of cirrhosis without HCC were assessed. The MBOAT7 TT genotype was not predictive of HCC in Latin Americans (TT vs CC OR adjusted = 1.15, 95% CI 0.66–2.01, p = 0.610) or Europeans (TT vs CC OR adjusted = 1.20, 95% CI 0.59–2.43, p = 0.621). No significant association was noted on subgroup analysis for NAFLD, viral hepatitis, or alcohol-related liver disease. The TT genotype was increased in the NAFLD-cirrhosis cohort of Latin Americans compared to a non-cirrhotic NAFLD cohort (TT vs CC + CT OR = 2.75, 95% CI 1.10–6.87, p = 0.031). Conclusion: The rs631738 C &gt; T allele of MBOAT7 was not associated with increased risk of HCC in Latin Americans or Europeans. An increase in the risk of cirrhosis was noted with the TT genotype in Latin Americans with NAFLD. Graphical Abstract: [Figure not available: see fulltext.]</p