0000000000049982
AUTHOR
Ferran Suay
Relationships between recall of perceived exertion and blood lactate concentration in a judo competition
Relationships between perceived exertion and blood lactate have usually been studied in laboratory or training contexts but not in competition, the most important setting in which sports performance is evaluated. The purpose of this study was to examine the relationships between psychological and physiological indices of the physical effort in a competition setting, taking into account the duration of effort. For this, we employed two Ratings of Perceived Exertion (RPE and CR-10) and lactic acid plasma concentration as a biological marker of the effort performed. 13 male judo fighters who participated in a sports club competition provided capillary blood samples to assay lactate concentrat…
Effects of competition and its outcome on serum testosterone, cortisol and prolactin.
In various species, competitive encounters influence hormonal responses in a different way depending on their outcome, victory or defeat. This study aimed to investigate the effects of sports competition and its outcome on hormonal response, comparing it with those displayed in situations involving non-effort and non-competitive effort. To this end, serum testosterone (T), cortisol (C) and prolactin (PRL) were measured in 26 judoists who participated in three sessions (control, judo fight and ergometry). The relationship between hormonal changes and psychological variables before and after the fight were also analysed. Our results showed a hormonal response to competition, which was especia…
Ageing: Not only an age-related issue.
Developments in the last century have led to an unprecedented increase in life expectancy. These changes open opportunities for humans to grow and develop in healthy and adaptive ways, adding life to years as well as years to life. There are also challenges, however - as we live longer, a greater number of people will experience chronic illness and disability, often linked to lifestyle factors. The current paper advances an argument that there are fundamental biological sex differences which, sometimes directly and sometime mediated by lifestyle factors, underpin the marked differences in morbidity and mortality that we find between the sexes. Furthermore, we argue that it is necessary to c…
Low-Cost Robotic Guide Based on a Motor Imagery Brain–Computer Interface for Arm Assisted Rehabilitation
Motor imagery has been suggested as an efficient alternative to improve the rehabilitation process of affected limbs. In this study, a low-cost robotic guide is implemented so that linear position can be controlled via the user&rsquo
Anticipatory cortisol, testosterone and psychological responses to judo competition in young men.
This study compares the anticipatory hormonal and psychological responses of 17 male judo players to an official competition with the data obtained during eight resting sessions carried out at the same time of day, throughout an entire sports season. Testosterone (T) and cortisol (C) levels were determined 1 h and 30 min before competition, and mood, anxiety and expectancies were also evaluated. C levels and anxiety scores were concurrently higher before the contest than in resting conditions; however, non-significant correlations between them were found. The anticipatory T response was not significant for the whole group. However, one group of subjects did display T increases, higher C lev…
Ansiedad y respuestas electrofisiológicas a una tarea de estrés mental tras un ejercicio aeróbico máximo
El objetivo del presente trabajo fue analizar las relaciones de la ansiedad con determinadas respuestas fisiológicas a una tarea de estrés mental. Para ello, se tomó una muestra de deportistas de élite varones de la Comunidad Valenciana de diferentes disciplinas deportivas. De acuerdo con las puntuaciones que los sujetos obtuvieron en las escalas STAI-R y STAI-E, completadas antes y después respectivamente, de una ergometría máxima, fueron separados en dos grupos extremos de alta y baja ansiedad. Se registraron de forma computerizada la frecuencia cardíaca y la actividad electrodérmica antes, durante y después de una tarea Stroop en ordenador. Los niveles basales de actividad electrodérmica…
Evaluating the Effect of Stimuli Color and Frequency on SSVEP
Brain&ndash
Correlating testosterone and fighting in male participants in judo contests
The role of hormones in human aggression is open to debate, but takes on a new urgency owing to the alarming abuse of androgenic anabolic steroids by some sports participants. In this study, video-taped behavior exhibited by 28 male competitors during a judo fight was assessed to analyze its relation to serum testosterone and cortisol levels measured before and after the bouts. A positive relation between testosterone and offensive behaviors was obtained in the sense that the greater the hormonal titer, the greater the number of threats, fights, and attacks. These findings coincide with the pattern of relationships found using observational scales. Conversely, cortisol also presented positi…