Effect of α-tocopherol megadoses on hematologic parameters and antioxidant capacity of rats in an ultraendurance probe

This study was aimed to analyze the effect of two different megadoses of α-tocopherol (vit E) in the antioxidant activity and red and white blood series of Wistar rats after a 180-min ultraendurance probe. Three groups of 10 rats were analyzed; VEAG: acute administration of a megadoses of 5,000 IU/kg of vit E the day before the probe; VECG: chronic administration of 1,000 IU/kg/day of vit E for 6 days before the probe; CG: placebo administration. VEAG presented white cells, red blood cells, hematocrit, hemoglobin values significantly higher than CG and VECG (p < 0.05). The mean corpuscular hemoglobin and lymphocytes concentrations were significantly higher in the VECG than in the other two groups (p < 0.05). Similarly, VEAG presented a significantly higher vit E blood concentration than VECG and CG (p < 0.05), and VECG than CG (p < 0.05). Finally, we found a significantly positive correlation between trolox equivalent antioxidant capacity (TEAC) and red blood cells concentration (r = 0.374) and a significantly inverse correlation between TEAC and blood lactate concentration (r = −0.365). Our findings suggest that acute vit E megadoses could protect against transitory sport anemia symptoms and increase the white blood cell count in comparison with the chronic dose and control groups after an ultraendurance probe

Evaluación de la excitación cortical por umbral de fusión de parpadeo crítico en ciclistas

Background: The first contact that every customer has when buying a food is the packaging, this is responsable for the handling, security, aesthetics and even advertising of the product. Over the years, the food industry has always shown great interest in developing packaging with different materials, some toxic for humans and others not. Scope and approach: This article presents a bibliometric review to identify during the last 20 years, what types of materials have been used to develop food packaging for human consumption, also identifies who are the most focused researchers in this topic, which countries are most interested in the field and how an entire academic social network has been created to identify the future of food packaging. Key findings and conclusions: The results show that the future of food packaging materials includes not only an advanced use of technology, but also a great concern for the care of health and the environment.Antecedentes: el primer contacto que tiene cada cliente al comprar un alimento es el empaque, este es responsable del manejo, la seguridad, la estética e incluso la publicidad del producto. A lo largo de los años, la industria alimentaria siempre ha mostrado un gran interés en desarrollar envases con diferentes materiales, algunos tóxicos para los seres humanos y otros no. Alcance y enfoque: este artículo presenta una revisión bibliométrica para identificar durante los últimos 20 años, qué tipos de materiales se han utilizado para desarrollar envases de alimentos para consumo humano, también identifica quiénes son los investigadores más enfocados en este tema, qué países están más interesados en el campo y cómo se ha creado toda una red social académica para identificar el futuro del envasado de alimentos. Conclusiones y conclusiones clave: los resultados muestran que el futuro de los materiales de envasado de alimentos incluye no solo un uso avanzado de la tecnología, sino también una gran preocupación por el cuidado de la salud y el medio ambiente

A complete psychophysiological profile of a Paralympic athlete in a ultraendurance: A case study

Psychophysiological response of athletes with spinal cord injurie has not been reported yet in scientific literature. The aim of this study is to analyze the specific psychophysiological response in a Paralympic athlete during competitive activities. We collected the following psychophysiological measurements: anxiety-trait, anxiety-state, locus of control, perceived psychological stress, stress-copying style, rate of perceived exertion, perceived muscle pain, body temperature, forced vital capacity, blood oxygen saturation, blood glucose and lactate concentrations, isometric hand strength, cortical arousal, heart rate variability, heart rate and velocities of a female Paralympic spinal cord injured athlete in a 11 hours and 44 minutes mountain ultraendurance event. An increase in sympathetic autonomous nervous system, heart rate, lactate, muscular pain and rated of perceived exertion and a decrease in cortical arousal and hand strength and inspiratory muscle fatigue. These results are consistent with the expected response during a highly stressful situation and consistent with previous findings in athletes without spinal cord injurie.Sin financiaciónNo data WoSScopus (Conference Paper)No data SPI – ICEE (2018)UE

Use of Biotechnology Devices to Analyse Fatigue Process in Swimming Training

The aim of the present research was to analyze the acute psycho-physiological response during a high intensity interval training (HIIT) session of trained swimmers. We analyzed blood lactate concentration, heart rate, heart rate variability (HRV), arms isometric strength, rating of perceived exertion (RPE) and cortical arousal before and after a HIIT session in 14 trained swimmers (16.2 ± 2.6 years 169.1 ± 10.2 cm 61.3 ± 9.9 kg). HIIT session consisted in: 4 × 10 m tethered swimming resting 90 s between sets, 3 min rest, 16 × 25 m maximum speed swimming resting 30 s between sets. Blood lactate concentration, cortical arousal, and rating of perceived exertion significantly increased (p < 0.05) after HIIT. HRV parameters significantly decreased after HIIT, showing an increase in sympathetic nervous system modulation. Results obtained showed the high impact of HIIT sessions on the swimmer’s organism, which may be the cause of adaptation in this low volume training sessions.Sin financiación2.098 JCR (2017) Q2, 46/94 Health Care Sciences and Services; Q3, 13/25 Medical Informatics0.619 SJR (2017) Q2, 27/190 Health Informatics, 12/64 Health Information Management, 83/1258 Information Systems, 1087/2878 Medicine (miscellaneous)No data IDR 2017UE