Ski mountaineering is an increasingly popular sport with a relatively high risk of injury. Therefore, several studies have analyzed factors related to the likelihood of injury, including athlete characteristics, training, resilience and equipment. Thus, the aim of this study was to identify factors that may influence injury risk. A 15-minute online survey was sent to various ski mountaineering groups of different ages and levels. Both the Mann–Whitney U test and odds ratio analysis were performed in order to analyze the data. Results from 104 skiers showed that most injuries occurred in the lower extremities, especially in the knee (29.6%). The findings indicated that skiers who had suffered an injury performed in more competitions per year (p = 0.046), more ski mountaineering sessions per week (p = 0.022) and fewer core training sessions per week (0.029), although core training and competition were not statistically significant factors. Likewise, non-injured athletes had fewer pairs of skis (p = 0.019), which were also wider (p = 0.04). However, no difference was found for warm up and resilience between both groups (p = 0.275). In conclusion, it is important to implement preventive measures based on these factors, even if more research is needed.

La práctica de ejercicio físico ha sido asociada a un menor riesgo de desarrollo y recurrencia del cáncer. Asimismo, estudios previos sugieren que el ejercicio es eficaz para reducir el riesgo de desarrollar alteraciones metabólicas. Por lo tanto, esta investigación pretende evaluar los efectos de un programa de ejercicio combinado de 12 semanas sobre la reducción de los niveles de hemoglobina glicada (HbA1c) en pacientes con cáncer. Para ello, 22 pacientes no diabéticos fueron asignados aleatoriamente a una intervención de ejercicio combinado de 12 semanas o al grupo control. Se realizaron evaluaciones iniciales y a los 3 meses para valorar los cambios en los niveles de HbA1c, la grasa y la masa musculoesquelética de los 22 participantes que completaron el estudio. Analizando la muestra hubo mejoras significativas en los niveles de HbA1c (p=0,033). Además, cuando se excluyeron los mayores de 65 años, las diferencias fueron mayores (p=0,017). Aunque no se encontraron diferencias significativas entre las reducciones de los sujetos con diferentes niveles basales de HbA1c, los que tenían niveles más altos redujeron los valores en un 6,8% y los que tenían niveles normales en un 3,6%. Además, no se encontró ninguna correlación entre las reducciones de la HbA1c y los cambios en la composición corporal. Esta intervención de ejercicio combinado de 12 semanas dio lugar a una reducción de los niveles de HbA1c, pero este cambio no se asoció con los cambios en la composición corporal. Palabras clave: Oncología, Ejercicio, Composición Corporal, Entrenamiento Concurrente, Glucosa, Hemoglobina Glicada. Abstract. Exercise has been associated with lower risk of cancer development and recurrence. Studies suggest that exercise is effective in reducing the risk of developing metabolic alterations. Due to the inconclusive results of previous studies, this research aims to evaluate the effects of a 12-week concurrent exercise programme on the reduction of glycated hemoglobin (HbA1c) levels in cancer patients. 22 non-diabetic patients were randomly assigned to a 12-week combined exercise intervention or to the control group. Baseline and 3-month assessments were performed to evaluate changes in HbA1c, fat and musculoskeletal mass for the 22 participants who completed the study. Analyzing the sample there were significant improvements in HbA1c (p=0.033), when excluding those over 65 years of age, the differences were greater (p=0.017). Although no significant differences were found between the reductions of subjects with different baseline HbA1c levels, those with higher levels reduced values by 6.8% and those with normal levels by 3.6%. Furthermore, no correlation was found between reductions in HbA1c and changes in body composition. This 12-week combined exercise intervention resulted in a reduction in HbA1c levels, but this change was not associated with changes in body composition. Key Words: Oncology, Exercise, Body Composition, Concurrent Training, Glucose, Glycated Hemoglobin.

Anaerobic performance is decisive in many sports. The Wingate Anaerobic Test (WAnT) is the most widely used test for the assessment of anaerobic performance to date. Performance in this test is influenced by many variables, including genetics. The aim of this review is to analyze the genes related to WAnT performance. A detailed search of four databases (Pubmed, Scopus, Web of Science and Cochrane Library) was conducted until February 2022. This literature search was implemented according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses statement. Nine eligible studies were selected from the 153 records identified. 3 articles for the ACTN3 gene, 2 for AMPD, one combined ACTN3 and AMPD, 1 article each for PPARA, UCP2 and MCT1. The genes ACTN3 and AMPD seem to report contradictory literature regarding its influence on WAnT peak power (PP), mean power and fatigue index. The MCT1 gene seems to have no influence, and the PPARA and UCP2 genes seem to have a positive relationship with PP.

Traditionally, cross-country skiing has been known for having a strong endurance component; however, strength demands have significantly increased in recent years. Given this importance, several studies have assessed the effects of strength training in cross-country skiing. Therefore, the aim of this systematic review was to analyze the results of those studies. A detailed search of four databases (Pubmed, Scopus, Web of Science and Cochrane Library) was conducted until February 2022, according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses statement. Ten eligible studies were selected from the 212 records identified, all of them including young well-trained skiers and interventions of 6–12 weeks. Results showed that maximal strength training may improve some important variables: for instance, performance, double-poling economy and maximal strength. However, this type of training failed to change other indicators such as peak oxygen consumption. Concurrent training, which combines endurance and maximal strength training, seems to be effective to improve performance. The mechanisms responsible for the improved economy of double poling might be due to a lower percentage of maximal strength during double poling at a given workload, which could increase performance. Future studies should include longer interventions which analyze a more varied sample.