The use of oxygen as a possible screening biomarker for the diagnosis of chronic fatigue

Background: The aim of this study was to verify whether the mean percentage of oxygen use in the aerobic-anaerobic transition phase or isocapnic buffering (IB) was lower in women with chronic fatigue syndrome (CFS) compared to healthy women, and if this variable could be used as a screening biomarker for the diagnosis of CFSMethodsA cross-sectional study was conducted. Forty-four adult women (22 with CFS and 22 healthy) performed a cycle ergometer stress test with gas analyser (CPET). Maximum oxygen consumption (V˙O2 max), oxygen consumption at the anaerobic threshold (V˙O2 at Vt2), maximum ventilatory volume (V˙E max), time of maintenance of the isocapnic buffering phase (IB duration), and mean percentage of oxygen use in isocapnic buffering phase (% O2 use in IB) were analyzed. Data were explored from a principal component analysis. Groups were matched by propensity score to be mismatched in BMI and a comparison of means and medians was performed. A logistic regression model was built to predict the probability of CFS.ResultsThe mean and median values of the variables obtained in the CPET was significantly higher in the healthy group compared to the CFS. In the logistic regression model, VO2 max, IB duration, and mean % of O2 use in IB were selected as predictors. The sensitivity and specificity were greater than 90%.ConclusionThe combination of the factors V˙O2 max, IB duration, and mean % of O2 use in IB can be used as a screening biomarker for the diagnosis of CFS. (AU)

COVID-19 and mask in sports

INTRODUCTION: Due to the mandatory use of a mask, and the authorization to do outdoor sports in Catalonia, we aimed to assess the physiological impact of the hypercapnia hypoxia generated by the masks during aerobic sports practice. METHODS: Eight subjects (2 women, 6 men) were assessed at baseline with and without a mask, and immediately after a 21-flex test performed following the Ruffier protocol with a mask. Measures of HR (heart rate), concentration of O2 and CO2 inside the mask and SatO2 were assessed. The test was carried out in ambient air in squares in the city of Barcelona. RESULTS: A decrease in O2 was recorded, and when comparing the, baseline 20.9%, baseline mask 18.3%, post-exercise 17.8% (p < 0.001). An increase in CO2 in the three preconditions (464, 14162, 17000ppm; p < 0.001). Basal saturation O2 was 97.6±1.5% and post exercise 92.1±4.12% (p 0.02). CONCLUSIONS: The use of masks in athletes causes hypoxic and hypercapnic breathing as evidenced by increased effort during exercise. The use of masks during a short exercise with an intensity around 6-8 METS, decreases O2 by 3.7% and increases the CO2 concentration by 20%

No disponible

Contraindicaciones cardiológicas para la práctica deportiva / Cardiological contraindications in sports

La muerte súbita en el deporte está causada en la mayoría de ocasiones por enfermedades cardiacas. El objetivo del cribado pre-participativo es poder identificar a los individuos que requieran un tratamiento específico para continuar el deporte o el cese de la práctica deportiva. La evidencia científica actual se basa en recomendaciones de expertos que en algunos casos son controvertidas y en ocasiones poco prácticas. Esta revisión tiene como objetivo dar un enfoque actualizado y pragmático de las recomendaciones en los deportistas con cardiopatía

In most cases, sudden death in sports is caused by heart disease. The aim of preparticipation screening is to identify individuals who require specific treatment to continue the sport or stop practicing it. Current scientific evidence is based on expert recommendations that in some cases are controversial and sometimes impractical. This review aims to present an updated and pragmatic approach to the recommendations in athletes with heart disease

Prevención de lesiones en el deportista (aspectos generales y aspectos podológicos) / No disponible

Uno de los principales problemas que tienen los deportistas,tanto si son del mundo profesional comoamateur, son las lesiones deportivas. Estas puedenser tanto agudas como crónicas. En la actualidad seobserva que los entrenamientos son cada vez másexigentes tanto en el número de horas de entrenocomo en la intensidad de las cargas. Esto, junto aunos periodos de descanso entre competición insuficientesha hecho que aparezcan de forma fácillas lesiones deportivas y dentro de estas las lesionespor sobrecarga. Estas lesiones, son muy antipáticasy si no se actúa sobre su etiología es muy fácil que secronifiquen. El presente trabajo clasifica de formasistemática y didáctica los distintos factores que ala larga, si incidimos en ellos, pueden disminuir laprobabilidad de que aparezca una lesión deportiva.Seguro que nos dejamos unos cuantos, ya que eltema de prevención de lesiones es un tema abiertoy permanentemente en revisión. Los avancestecnológicos de la actualidad han hecho que enlos últimos años haya cambiado el diagnóstico, eltratamiento y la prevención de éstas(AU)

One of the main problems that sportsmen haveis sport injuries, independently of if they areprofessional or amateur sportsmen. Theseinjuries can be acute as well as chronic. Atpresent, trainings are increasingly demandingboth in the number of hours of training and theintensity of loads. This, beside insufficient periodsof rest between competitions, is the causethat sports injuries, and more specifically injuriesdue to overloads, have increased recently.These injuries are very unpleaseant and onemust act upon their etiology or otherwise theywill get chronic. The present work classifiesin a systematical and didactic way the differentfactors that can reduce the probabilityof appearance of sport injuries if we act uponthem. Most probably we are forgeting someof the factors, since the subject of injuriesprevention is an open topic permanently inreview. Actual technological advances havechanged the diagnosis, the treatment and theprevention of sport injuries(AU)