Acute Kidney Injury and Hyponatremia in Ultra-Trail Racing: A Systematic Review.

Background and objectives: Ultra-trail races can cause episodes of acute kidney injury (AKI) and exercise-associated hyponatremia (EAH) in healthy subjects without previous renal pathology. This systematic review aims to review the incidence of these two syndromes together and separately taking into account the length and elevation of the ultra-trail race examined. Materials and Methods: A systematic review was conducted through electronic search in four electronic databases (PubMed, EBSCO, Web of Science and Alcorze). Results: A total of 1127 articles published between January 2006 and December 31, 2021 were included, 28 of which met the inclusion criteria. The studies were categorized according to the length and stages of the race in four categories: medium (42 to 69 km), long (70 to 99 km), extra (>100 km) and multi-stage if they included various stages. A total of 2950 runners (666 females and 2284 males) were extracted from 28 publications. The AKI incidence found was 42.04% (468 cases of 1113), and 195 of 2065 were diagnosed with EAH, accounting for 9.11%. The concurrence of both pathologies together reached 11.84% (27 individuals) from a total of 228 runners with AKI and EAH simultaneously analyzed. Sorted by race category, the AKI+EAH cases were distributed as follows: 18 of 27 in the extra (13.63% and n = 132), 4 in the large (5.79% and n = 69) and 5 in the medium category (18.15% and n = 27). Conclusions: According to these results, extra and medium races showed a similar incidence of AKI+EAH. These findings underline the importance of the duration and intensity of the race and may make them responsible for the etiology of these medical conditions. Due to their variable incidence, EAH and AKI are often underdiagnosed, leading to poorer prognosis, increased condition seriousness and hindered treatment. The results of this review urge participants, coaches and race organizers to take measures to improve the early diagnosis and urgent treatment of possible EAH and AKI cases.

Individual variability of high-sensitivity cardiac troponin levels after aerobic exercise is not mediated by exercise mode.

We compared the response of high-sensitivity cardiac troponin T (hs-cTnT) after 60 min of swimming, running and cycling in well-trained triathletes. The maximal increase in hs-cTnT was similar in all exercise bouts (swimming 453%, cycling 349% and running 471%) although there was substantial individual variability in peak hs-cTnT. The post-exercise kinetics for hs-cTnT was consistent. The change in hs-cTnT was correlated between trials. In all trials, hs-cTnT had largely returned to baseline levels 24 h post-exercise. In summary, an increase in hs-cTnT was apparent in all triathletes independent of exercise mode and despite variable peak data the consistent kinetics over 24 h post-exercise would suggest this represents a physiological phenomenon.

Bone Mineral Density in Field Hockey Players: A Systematic Review.

The aim of this study was to carry out a systematic review to compare and analyse the bone mineral density of field hockey players of both sexes and of different ages, with other sports and with a sedentary population. The search process was carried out using the PubMed, SPORTDiscus, Web of Science and Scopus databases. The search ended on 18 March 2024. We selected articles in which a comparison was made of bone mineral density of the whole body, lumbar spine, femoral neck, arms and legs, among field hockey players, and/or with other sports and/or with a sedentary population. The systematic review followed the guidelines described in the 2020 PRISMA statement. The initial search identified 220 articles. After applying the inclusion and exclusion criteria, the search was narrowed down to seven articles in total. It was observed that the field hockey group had better bone mineral density values than sedentary population and the low-impact sports population. Basketball players had better whole body and leg bone mineral density values than field hockey players. Causality could not be established due to the cross-sectional nature of the included studies. The better bone mineral density values in field hockey players compared to the sedentary population may be because people who participate in impact sports have a better bone mineral density. The differences in bone mineral density between field hockey and low-impact sports could be related to a lower impact during their practice in these disciplines.

Bone Turnover Alterations after Completing a Multistage Ultra-Trail: A Case Study.

A series of case studies aimed to assess bone and stress fractures in a 768-km ultra-trail race for 11 days. Four nonprofessional male athletes completed the event without diagnosing any stress fracture. Bone turnover markers (osteocalcin (OC), serum C-terminal cross-linking telopeptide of type I collagen (CTX), bone-specific alkaline phosphatase (BALP), and serum turnover calcium (Ca2+)) were assessed before (pre) and after the race (post) and on days two and nine during the recovery period (rec2 and rec9), respectively. Results showed: post-pre-OC = -45.78%, BALP = -61.74%, CTX = +37.28% and Ca2+ = -3.60%. At rec2 and rec9, the four parameters did not return to their pre-run levels: OC, -48.31%; BALP, -61.66%; CTX, +11.93% and Ca2+, -3.38%; and OC = -25.12%, BALP = -54.65%, CTX = +93.41% and Ca2+ = +3.15%), respectively. Our results indicated that the ultra-trail race induced several changes in bone turnover markers, uncoupling of bone metabolism, increased bone resorption: OC and BALP and suppressed bone formation: CTX and Ca2+. Bone turnover markers can help determine the response of bone to extreme effort and might also help predict the risk of stress fractures.

Performance Outcome Measures in Padel: A Scoping Review.

Padel is a modern doubles racket sport which has become popular around the world in the last decades. There has been an increase in the quantity of scientific research about this sport in the last years. Therefore, the main objective of this scoping review is to provide an updated contextualization of research regarding padel. PRISMA ScR was used in order to search for articles fulfilling the inclusion criteria in five fields of interest: the anthropometric profile, physiology and physical performance, biomechanics, the epidemiology of injuries, and match analyses Seventy-seven records were included in the study. Padel is an emerging sport both in sport and research terms. This scoping review provides coaches and researchers with all the knowledge available in the five fields of interest. Furthermore, this study enables them to make a map of the current state of the research about padel, and it opens up doors to future investigations.

Características antropométricas, composición corporal y somatotipo de jugadores de tenis de mesa de alto nivel / Anthropometric characteristics, body composition and somatotype of high level table tennis players

El objetivo de este estudio fue describir las características antropométricas, la composición corporal y el somatotipo de una muestra internacional de jugadores de tenis de mesa de alto nivel clasificados entre los 150 mejores jugadores del mundo. En el estudio participaron un total de 31 jugadores (18 varones y 13 mujeres) de categoría absoluta. Todos los deportistas analizados en el estudio competían de manera regular en la Superdivisión, máxima categoría de la liga española y en pruebas internacionales de carácter oficial (ETTU e ITTF). La muestra fue distribuida en dos grupos atendiendo al sexo. Un total de 16 variables antropométricas fueron evaluadas. Se encontraron diferencias estadísticamente significativas en la masa, talla, IMC (p<0,01), en cinco pliegues (p<0,05), en dos perímetros (p<0,01) y en todos los diámetros (p0,01). Asimismo se encontraron diferencias en el componente endomórfico y mesomórfico del somatotipo (p<0,02). El grupo masculino presentó una distribución del somatotipo mesomorfo balanceado (2,5-4,6-2,6) mientras que el grupo femenino fue endo-mesomórfico (4,0-3,4-2,9). Los resultados obtenidos sugieren un biotipo diferente a los datos de referencia, presentando los hombres menor endomorfia mientras que las mujeres alcanzan mayores niveles en su endomorfia y un descenso en la mesomorfia. Este estudio aporta datos biotipológicos actualizados de referencia para la población de elite de tenis de mesa.

The aim of this study was to analyze the anthropometric profile, body composition and somatotype of international top-level table tennis players belonging to the 150 best world players. A total of 31 players (18 males and 13 females) belonging to the absolute category were evaluated. All of them played regularly in the "Superdivision", the highest Spanish table tennis championship category as well as in other official international championships (ETTU e ITTF). Participants were divided into two groups according to their sex and a total of 16 anthropometric variables were assessed. Statistically significant differences were recorded in: body mass, height and BMI values (p<0.01); seven skinfolds (p<0.05), two girths (p<0.01) and in all breadths (p<0.01). Significant differences were also found between the somatotype mesomorph and endo-mesomorph profiles (p<0.02). A balanced mesomorph somatotype was found for males (2.5-4.6-2.6) while females recorded a mesomorph-endomorph somatotype (4.0-3.4-2.9). These results highlight a different biotype if compared with reference data with less endomorphy between males and an improvement of endomorphy and less mesomorphy between females. This study provides new biotypology data that represent a suitable reference for elite table tennis players.