0000000000083852
AUTHOR
Gabriel Brizuela
Hematological and ventilatory responses to a 3900 m altitude sojourn in an elite wheelchair-marathoner.
This case study aimed to report blood markers and resting respiratory rate (RR) oscillations at sea level, during a 5-wk 3900 m altitude sojourn, and after returning to sea level in a 36-year-old professional wheelchair marathoner. Outcome measures plasma erythropoietin (EPO) concentration, hemoglobin, reticulocytes count, erythrocytes and hematocrit as well as RR were measured upon wakening 7-weeks pre-altitude, 7-days pre-altitude, 35 hours after arrival to altitude, on days 8, 15, 21, 28 and 35 at altitude, 6 and 16 days after returning to sea level. EPO increased up to 259 % (31.6 U l-1) 35 hours upon arrival at altitude and decreased below pre-altitude level (12.2 U l-1) on the 21st da…
Pedaleo de brazos en personas con lesión medular, parálisis cerebral o ataxia cerebelosa: Parámetros fisiológicos. [Armcrank pedaling in persons with spinal cord injury, cerebral palsy or cerebellar ataxia: Physiological parameters].
espanolLos desordenes neurologicos generan afectacion fisica y derivan en sedentarismo, enfermedades coronarias y obesidad o diabetes, reduciendo tanto la esperanza como la calidad de vida. La oferta de actividad fisica adaptada es escasa por falta de informacion especifica sobre la forma de adecuarlo y dosificarlo a las personas que presentan estos desordenes. Con el fin de comparar el efecto del ejercicio de pedaleo de brazos sobre la respuesta fisiologica y la percepcion del esfuerzo, en 8 personas con lesion medular, 4 con paralisis cerebral y 4 con ataxia de Friedreich, se analizo su respuesta fisiologica, asi como su percepcion subjetiva al esfuerzo, frente a un grupo Control (16 part…
Actividad cardíaca vagal, volumen e intensidad de entrenamiento en una atleta de fondo keniata. [Cardiac vagal activity, training mileage, and intensity in a Kenyan female distance athlete].
El objetivo de este estudio fue analizar las oscilaciones de la actividad cardíaca parasimpática (ACP) en un mesociclo de una atleta keniata. La variabilidad de la frecuencia cardiaca (VFC) se midió durante tres semanas. En la primera semana (W1) el volumen de entrenamiento fue 120,55 km, en la segunda (W2) 96,71 km y en la tercera (W3) 79,45 km. Se analizó la media semanal de los intervalos (R-R), la expresión logarítmica (Ln) del cuadrado de la raíz media de la unión de los intervalos R-R adyacentes (LnrMSSD), la desviación estándar de los intervalos R-R (LnSDNN), la frecuencia cardíaca media (FC) de cada sesión y las fluctuaciones diarias de LnrMSSD (LnrMSSDCV). Se observaron incrementos…
Supination control increases performance in sideward cutting movements in tennis.
The objective of this study was to explore the effects of tennis shoe characteristics on performance during sideward cutting movements followed by direction changes. Five tennis players (age = 21.5 +/- 0.8 years, mass = 75.2 +/- 2.8 kg, and height = 1.78 +/- 0.05 m) participated in the study and 10 tennis shoes were tested. Several footwear mechanical parameters were analyzed: Shore A hardness, longitudinal and transverse flexibility, midsole height at heel, presence of heel counters, and weight. A force plate was used to measure the kinetic variables, and two video cameras were used to perform a three-dimensional photogrammetric analysis. Results revealed that subject-footwear interaction …
Nutritional strategies in an elite wheelchair marathoner at 3900 m altitude: a case report.
Abstract Background Altitude training is a common practice among middle-distance and marathon runners. During acclimatization, sympathetic drive may increase resting metabolic rate (RMR), therefore implementation of targeted nutritional interventions based on training demands and environmental conditions becomes paramount. This single case study represents the first nutritional intervention performed under hypobaric hypoxic conditions (3900 m) in Paralympic sport. These results may elucidate the unique nutritional requirements of upper body endurance athletes training at altitude. Case presentation This case study examined the effects of a nutritional intervention on the body mass of a 36-y…
The effect of arm-crank exercise training on power output, spirometric and cardiac function and level of autonomy in persons with tetraplegia
Studies on the effects of exercise training in persons with cervical spinal cord injury (CSCI) are scarce. The aim of this study was to determine the effect of an 8-week stationary arm-crank exercise (ACE) training programme on the level of autonomy, exercise performance, pulmonary functional parameters and resting heart rate variability (HRV) in persons with CSCI. Quadriplegia Index of Function (QIF), arm-crank peak power output (Ppeak), spirometric variables, and HRV indices were measured before and after the training programme in a group of 11 persons with CSCI. ACE training increased Ppeak in both groups (
Evaluación de parámetros biomecánicos del lanzamiento de jabalina en lanzadores de diferente nivel de rendimiento
Mediante análisis cinemático y utilizando como muestra a lanzadores agrupados en función de
 la marca conseguida (grupo internacional: atletas con marca superior a los 80 metros; y grupo
 nacional: atletas con marca inferior a 80 metros) el objetivo del estudio se centró en determinar si
 alguno de los parámetros utilizados para evaluar la eficacia del gesto establece diferencias entre
 uno y otro grupo de lanzadores.
 Los resultados muestran que algunos de dichos parámetros cinemáticos ayudan a establecer los
 márgenes para la pertenencia a los. Del total de las 41 variables contrastadas, sólo 8 de ellas
 establecían diferencias significativas entre grupo…
Influence of Training Load on Mood Disturbance at Sea Level and 3900 m Altitude: A Case Study of a Wheelchair Athlete
The purpose of this case study was to investigate the influence of a training load (TL), oxygen saturation (SO2) and blood pressure (BP) on mood states in a wheelchair marathoner during (7 weeks at sea level (SL), 5 weeks at 3860 m altitude, 1 week returning to SL). TL was obtained with Foster’s equation while mood states were obtained with the Profile of Mood States Questionnaire (POMS). Furthermore, SO2 and BP were assessed upon wakening. SO2 (%) decreased at altitude, compared to SL (88.31 ± 2.46 vs. 98.52 ± 0.11) and increased until the last week at altitude (92.64 ± 1.12). Systolic pressure (SP) increased at altitude compared to pre-altitude (126.0 ± 5…
Influence of Training Models at 3,900-m Altitude on the Physiological Response and Performance of a Professional Wheelchair Athlete: A Case Study.
Sanz-Quinto, S, Lopez-Grueso, R, Brizuela, G, Flatt, AA, and Moya-Ramon, M. Influence of training models at 3,900-m altitude on the physiological response and performance of a professional wheelchair athlete: A case study. J Strength Cond Res 33(6): 1715-1723, 2019-This case study compared the effects of two training camps using flexible planning (FP) vs. inflexible planning (IP) at 3,860-m altitude on physiological and performance responses of an elite marathon wheelchair athlete with Charcot-Marie-Tooth disease (CMT). During IP, the athlete completed preplanned training sessions. During FP, training was adjusted based on vagally mediated heart rate variability (HRV) with specific sessions…