Joint associations of device-measured physical activity and abdominal obesity with incident cardiovascular disease: a prospective cohort study.

OBJECTIVE: To examine the joint associations between physical activity and abdominal obesity with the risk of cardiovascular disease (CVD) events. METHODS: We included 70 830 UK Biobank participants (mean age±SD=61.6 ± 7.9 years; 56.4% women) with physical activity measured by wrist-worn accelerometers and without major chronic diseases. Participants were jointly categorised into six groups based on their physical activity level (tertiles of total volume and specific intensity levels) and presence or absence of abdominal obesity based on measured waist circumference. Associations with incident CVD (fatal and non-fatal events) were determined using proportional subdistribution hazard models with multivariable adjustment. RESULTS: After excluding events during the first 2 years of follow-up, participants were followed for a median of 6.8 years, during which 2795 CVD events were recorded. Compared with the low abdominal adiposity and highest tertile of physical activity, abdominal obesity was associated with higher risk of incident CVD, especially in those with low levels of vigorous-intensity physical activity (HR 1.42, 95% CI 1.22 to 1.64). Approximately 500 min per week of moderate-to-vigorous intensity and approximately 30-35 min of vigorous-intensity physical activity offset the association of abdominal obesity and the risk of having a CVD event. CONCLUSION: Physical activity equivalent to approximately 30-35 min of vigorous intensity per week appears to offset the association between abdominal obesity and incident CVD. About 15 times more physical activity of at least moderate intensity is needed to achieve similar results.

Leisure-time physical activity and all-cause mortality and cardiovascular disease in adults with type 2 diabetes: Cross-country comparison of cohort studies.

PURPOSE: This study aimed to quantify the dose-response association and the minimal effective dose of leisure-time physical activity (PA) to prevent mortality and cardiovascular disease in adults with type 2 diabetes. METHODS: Cross-country comparison of 2 prospective cohort studies including 14,913 and 17,457 population-based adults with type 2 diabetes from the UK and China. Baseline leisure-time PA was self-reported and categorized by metabolic equivalent hours per week (MET-h/week) according to World Health Organization recommendations: none, below recommendation (>0-7.49 MET-h/week); at recommended level (7.5-14.9 MET-h/week); above recommendation (≥15 MET-h/week). Mortality and cardiovascular disease data were obtained from national registries. RESULTS: During a median follow-up of 12.4 and 9.7 years, in the UK and China cohorts, repectively, higher levels of leisure-time PA were inversely associated with all-cause (1571 and 2351 events) and cardiovascular mortality (392 and 1060 events), mostly consistent with a linear dose-response relationship. PA below, at, and above recommendations, compared with no activity, yielded all-cause mortality hazard ratios of 0.94 (95% confidence interval (95%CI): 0.79-1.12), 0.90 (95%CI: 0.74-1.10), and 0.85 (95%CI: 0.70-1.02) in British adults and 0.87 (95%CI: 0.68-1.10), 0.88 (95%CI: 0.74-1.03), and 0.77 (95%CI: 0.70-0.85) in Chinese adults. Associations with cardiovascular mortality were more pronounced in British adults (0.80 (95%CI: 0.58-1.11), 0.75 (95%CI: 0.52-1.09), and 0.69 (95%CI: 0.48-0.97)) but less pronounced in Chinese adults (1.06 (95%CI: 0.76-1.47), 1.01 (95%CI: 0.80-1.28), and 0.79 (95%CI: 0.69-0.92)). PA at recommended levels was not associated with lower rates of major adverse cardiovascular events (2345 and 4458 events). CONCLUSION: Leisure-time PA at the recommended levels was not convincingly associated with lower mortality and had no association with risk of major adverse cardiovascular events in British or Chinese adults with type 2 diabetes. Leisure-time PA above current recommendations may be needed to prevent cardiovascular disease and premature mortality in adults with type 2 diabetes.

Dose-response associations, physical activity intensity and mortality risk: A narrative review.

Physical activity is consistently associated with reduced mortality, decreased risk for non-communicable diseases, and improved mental health in observational studies. Randomized controlled trials and observational Mendelian randomization studies support causal links between physical activity and health outcomes. However, the scarcity of evidence from randomized controlled trials, along with their inherent challenges like exposure contrasts, healthy volunteer biases, loss to follow-up, and limited real-world dose-response data, warrants a comprehensive approach. This review advocates synthesizing insights from diverse study designs to better understand the causal relationship between physical activity, mortality risk, and other health outcomes. Additionally, it summarizes recent research since the publication of current physical activity recommendations. Novel observational studies utilizing device-measured physical activity underscore the importance of every minute of activity and suggest that all intensity levels confer health benefits, with vigorous-intensity potentially requiring lower volumes for substantial benefits. Future guidelines, informed by device-measured physical activity studies, may offer refined age-specific recommendations, emphasize vigorous-intensity physical activity, and include daily step counts as a simple, easily assessable metric using commercial wearables.

Leisure-Time Physical Activity and Risk of Microvascular Complications in Individuals With Type 2 Diabetes: A UK Biobank Study.

OBJECTIVE: The aim of this study was to determine dose-response associations, including the minimal effective level, between leisure-time physical activity and risk of incident neuropathy, nephropathy, and retinopathy. RESEARCH DESIGN AND METHODS: This cohort study included 18,092 individuals with type 2 diabetes from the UK Biobank. Self-reported leisure-time physical activity was converted into MET-hours per week. Participants were categorized into no physical activity (0 MET-h/week), below recommendations (0-7.49 MET-h/week), at recommendations (7.5-14.9 MET-h/week), and above recommendations (≥15 MET-h/week). Microvascular complications were identified from hospital inpatient records using diagnosis codes. We used Cox proportional hazards regression analysis to calculate adjusted hazard ratios (aHRs) and restricted cubic splines to identify the minimal effective level of physical activity. RESULTS: During a median follow-up of 12.1 years, 672 individuals (3.7%) were diagnosed with neuropathy, 1,839 (10.2%) with nephropathy, and 2,099 (11.7%) with retinopathy. Any level of physical activity was associated with a lower risk of neuropathy and nephropathy but not retinopathy. Compared with those reporting no physical activity, the aHR of neuropathy was 0.71 (95% CI 0.53, 0.90) below recommendations, 0.73 (0.56, 0.96) at recommendations, and 0.67 (0.52, 0.87) above recommendations. Corresponding aHRs for nephropathy were 0.79 (0.68, 0.92), 0.80 (0.67, 0.95), and 0.80 (0.68, 0.95). The association with retinopathy was weaker, with aHRs of 0.91 (0.78, 1.06), 0.91 (0.77, 1.08), and 0.98 (0.84, 1.15), respectively. CONCLUSIONS: Any level of leisure-time physical activity was associated with a lower risk of neuropathy and nephropathy but not retinopathy in individuals with type 2 diabetes. For both neuropathy and nephropathy, the minimal effective physical activity level may correspond to <1.5 h of walking per week.

Body composition and mortality from middle to old age: a prospective cohort study from the UK Biobank.

BACKGROUND: How the association between adiposity and the risk of death changes with age, and which is the optimal level of adiposity to reduce mortality in older ages, is still not completely understood. We aimed to ascertain the age-specific risks of mortality associated with different measures of adiposity. METHODS: This was a prospective UK Biobank cohort study. Participants were categorized based on five different adiposity and body composition metrics. We explored the age-varying associations between body composition indices and all-cause mortality from 45 to 85 years of age at follow-up using hazard ratios (HR) from flexible parametric survival models with multivariable adjustment and age as timescale. Participants were followed from baseline (2006-2010) through 31 March 2020. RESULTS: We included 369,752 participants (mean baseline age = 56.3 ± 8.1 years; range 38.9-73.7 years; 54.1% women) and 10,660 deaths during a median follow-up of 11.4 years. Associations between body mass index and mortality were similar when using the fat mass index in magnitude and shape. Compared to participants with normal weight, overweight was not associated with the risk of death regardless of age and the adiposity measure used. Participants with obesity class I showed an HR of 1.20 (95% confidence interval [CI]: 1.08, 1.33) and 1.14 (95%CI: 0.98, 1.30) at ages 60 and 80, respectively, and participants with obesity class II an HR about 1.55 across all age. More attenuated associations with higher age were found in individuals with the highest obesity using the fat mass index. Very high lean mass was associated with an increased risk of mortality in those aged 55-75 years (HR about 1.20 across all ages). CONCLUSION: Obesity should be prevented at any age. Attenuated associations with older age were observed only among the individuals with the highest obesity, but the risk remained higher compared to normal-weight participants. Lean mass did not reduce mortality risk at any age.

Do Intellectually Gifted Children Show Similar Physical Habits, Physical Fitness Levels and Self-Perceived Body Image Than Typically Developed Children?

Scientific evidence regarding whether intellectually gifted children show similar physical activity habits and physical fitness levels in comparison to typically developed children, is inconclusive. This is in part due to the scant research that has directly compared both groups of people. In this study, physical activity prevalence, self-perceived and objectively assessed physical fitness levels, and body image were assessed in a sample of 74 intellectually gifted children (mean age 11.6 ± 1.2 years). Seventy-four non-gifted children matched by age and sex were selected as a comparison cohort. Results indicated that both groups showed similar self-perceived and objectively assessed fitness levels. Physical activity habits were also similar, although significant differences were observed indicating that intellectually gifted girls were less active in comparison with non-gifted girls. Both cohorts perceived their body image accurately, although intellectually gifted children were much more satisfied with their physical appearance.

Validity and reference values for the 3-minute shuttle run test in spanish preschoolers.

OBJECTIVE: The purpose of this study was to analyze the validity and provide normative values for the three-min shuttle run test in Spanish preschoolers. METHODS: A total of 497 children (mean age 4.83±0.57 years; 47.8% girls) performed the three-min shuttle run test. Posttest body mass index and heart rate values were taken as internal validity indicators. RESULTS: Age- and sex-specific percentiles for cardiorespiratory fitness were provided. Boys performed better than girls in the test. A significant association was observed between the total distance covered and heart rate (p=0.002). No correlation was found between body mass index and the test score, although the total distance covered by normal weight and obese children was significantly different (296.9 versus. 271.3 m; p=0.013). CONCLUSIONS: This study provides age- and sex-specific cardiorespiratory fitness normative values for the three-min shuttle run test when performed by Spanish preschoolers. This test is an interesting option when the lack of resources limits the measurement of cardiorespiratory fitness in the preschool setting.

Home-Based Exercise for People With Chronic Kidney Disease: A Systematic Review and Meta-Analysis.

BACKGROUND: Exercise performed at home could be a useful therapy for people with chronic kidney disease. This systematic review and meta-analysis aimed at describing the characteristics, main findings, methodological quality, and adherence rate reported in the existent randomized controlled trials that have provided information regarding the impact of home-based exercise programs on people with chronic kidney disease. METHODS: Electronic databases (MEDLINE/PubMed, SPORTDiscus, Scopus, and CENTRAL) were searched up to April 2021, using the keywords: "Exercise"; "Home"; "Kidney Disease." Preferred Reporting Items for Systematic Reviews and Meta-Analyses statement was adopted. Jadad scale and Cochrane's tool were used to assess the methodological quality and risk of bias. RESULTS: Out of the 14 studies finally selected, 11 were included in the meta-analysis and most presented high methodological quality. The meta-analysis showed significant effects of home-based exercise on fitness and quality of life, but a little impact on renal function. Although exercise performed at home was mostly feasible and safe, adherence was not high and a considerable number of dropouts were observed. CONCLUSION: Home-based exercise has positive effects on the fitness' level and on the quality of life on people with chronic kidney disease. Future studies are needed to identify whether exercise performed at home is a better physical therapy option than center-based exercise.

Questionnaires for assessing self-perceived physical fitness: A systematic review.

This systematic review aimed to identify and summarize the reliability and validity of the questionnaires that have been designed for assessing self-perceived physical fitness (PF) in elderly people. Three electronic databases (MEDLINE/PubMed, SPORTDiscuss and Scopus) were searched systematically from their inception until March 2021 in order to find investigations that provided information on the reliability and/or validity of questionnaires used for identifying self-perceived PF in this population. Nine studies fulfilled these criteria, and seven questionnaires were found, five of them being specifically designed for the elderly. Concurrent validity was mostly obtained by correlating the items of the questionnaires with PF field-based tests, and poor to moderately strong associations were obtained. Test-retest reliability was informed in five questionnaires, and high values were generally observed. The SRFit questionnaire showed the best rates of concurrent validity and test-retest reliability, although these results were partially affected by the mean age of the sample. The lack of a rigorous methodological approach when designing these questionnaires detected in this review, asks for further studies using quantitative and qualitative approaches in order to create more solid and valid measurement tools.

Validity and reference values for the 3-minute shuttle run test in spanish preschoolers

SUMMARY OBJECTIVE: The purpose of this study was to analyze the validity and provide normative values for the three-min shuttle run test in Spanish preschoolers. METHODS: A total of 497 children (mean age 4.83±0.57 years; 47.8% girls) performed the three-min shuttle run test. Posttest body mass index and heart rate values were taken as internal validity indicators. RESULTS: Age- and sex-specific percentiles for cardiorespiratory fitness were provided. Boys performed better than girls in the test. A significant association was observed between the total distance covered and heart rate (p=0.002). No correlation was found between body mass index and the test score, although the total distance covered by normal weight and obese children was significantly different (296.9 versus. 271.3 m; p=0.013). CONCLUSIONS: This study provides age- and sex-specific cardiorespiratory fitness normative values for the three-min shuttle run test when performed by Spanish preschoolers. This test is an interesting option when the lack of resources limits the measurement of cardiorespiratory fitness in the preschool setting.

Mortality of Spanish Former Elite Soccer Players and Coaches.

We analyzed whether male Spanish elite soccer players live longer than the general population. Secondly, we compared their mortality with a cohort of soccer players who continued working as soccer elite coaches after retirement. Using age and calendar-date adjusted life tables, we analyzed the mortality hazard ratio of 1333 Spanish male players born before 1950, and who played in elite leagues from 1939, compared with the Spanish population. Using Cox proportional hazards model we compared their mortality with a cohort of 413 players who continued as coaches. Players showed significantly lower mortality than the general population, but this advantage decreased with advanced age, disappearing after 80 years. Coaches showed a similar pattern. Comparing players versus coaches, date of birth and years as professional were associated with survival, but debut age and player position were not. Unadjusted median survival time was 79.81 years (IQR 72.37-85.19) for players and 81.8 years (IQR 74.55-86.73) for coaches. Kaplan-Meier estimator adjusted for covariables showed no difference between cohorts (p=0.254). In conclusion, former Spanish male players showed lower mortality than the general population, but this effect disappeared after 80 years of age. Continuing their career as coaches after retirement from playing did not confer major benefits.

Efectos del ejercicio acuático en personas con enfermedad renal: revisión sistemática y metaanálisis / Effects of aquatic exercise in people with kidney disease: systematic review and meta-analysis

OBJETIVO: Analizar la evidencia científica existente sobre los efectos que el ejercicio físico acuatico tiene en personas con enfermedad renal crónica (ERC).MATERIAL Y MÉTODO: Se realizó una revisión sistemática siguiendo la lista de verificación Preferred Reporting Items for Systematic review and Meta-Analysis Protocols, con el objetivo de localizar el mayor número de investigaciones que tuviesen como objetivo identificar los efectos de la práctica de ejercicio físico acuático en personas con ERC. Se realizó una búsqueda en las bases de datos PubMed, PEDro, Scopus y Cochrane, hasta marzo de 2019, empleándose las escalas PEDro, CERT, MINORS y NIH para determinar la calidad metodológica de las mismas. RESULTADOS: Se localizaron cinco investigaciones, dos fueron estudios aleatorizados controlados, dos estudios comparativos y uno no controlado. La puntuación media y la mediana obtenida tras aplicar la escala PEDro fue de 4 y de 4 respectivamente. Todas las intervenciones plantearon programas de ejercicio aeróbico, siendo por lo general de corta duración y altamente supervisadas, sin que se registraran efectos adversos derivados de su práctica. En gran parte de los estudios, se observaron efectos significativos en la condición física, parámetros fisiológicos y la calidad de vida, en menor medida. La práctica de ejercicio no tuvo impacto significativo ni en la actividad de la enfermedad ni en el dolor percibido en los pacientes. CONCLUSIONES: La práctica de ejercicio físico acuático es beneficiosa para las personas con ERC. Son necesarios estudios longitudinales que valoren el impacto de programas de ejercicio, así como su efecto sobre la calidad de vida a largo plazo

OBJECTIVE: Analyze the scientific evidence on the effects that aquatic physical exercise has on people with chronic kidney disease (CKD).MATERIAL AND METHOD: A systematic review was carried out following the checklist Preferred Reporting Items for Systematic review and Meta-Analysis Protocols, with the objective of locating the largest number of investigations that aimed to identify the effects of the practice of aquatic physical exercise in people with ERC. A search of the PubMed, PEDro, Scopus and Cochrane databases were carried out until March 2019, using the PEDro, CERT, MINORS and NIH scales to determine the methodological quality of the same. RESULTS: Five investigations were located, two of them were randomized control trials, another two studies comparatives and one was uncontrolled. The mean score and the median obtained after applying PEDro scale were 4 and 4 respectively. All the interventions proposed aerobic exercise programs, being generally of short duration and highly supervised, without any adverse effects arising from their practice. In a large part of the studies, significant effects were observed in physical condition, physiological parameters and quality of life, to a lesser extent. The practice of exercise had no significant impact on either the activity of the disease or the perceived pain in patients. CONCLUSIONS: Practice of aquatic exercise is beneficial in people with ERC. More longitudinal studies are needed to assess the impact of aquatic exercises as well as its effect and quality of life in long term

Impact of a five-month detraining period on the functional fitness and physical activity levels on active older people.

PURPOSE: This research was aimed at evaluating the effects of a five-month detraining period on the functional fitness level of a group of non-institutionalized and active older adults after taking part in a multi-component training program. A secondary aim was to determine how usual physical activity (PA) levels vary due to cessation of the program. METHODS: We tested sixty-five older people (mean age: 77.1 ± 6.2; 83% women) during the final week of an 8-month multi-component training program and during the first week after its resumption (five months later). We used the senior fitness test and the Minnesota Questionnaire to assess their functional fitness and their PA levels respectively. RESULTS: We observed a significant worsening of lower-limb strength (p = 0.008), shoulder range of motion (p = 0.004), and dynamic balance (p < 0.001) once the detraining period was completed. There was a slight downward trend in the remaining functional fitness dimensions, and there were significant differences when comparing the amount of PA estimated at pre-detraining and post-detraining (5155 ± 2258 vs 3937 ± 2087 MET-min·wk-1; p < 0.001). Older adults classified as very active showed a non-significant trend to smaller decreases in functional fitness once the detraining period was over, in comparison with those considered active. CONCLUSIONS: Active older people who regularly participated in a multicomponent training program showed a significant reduction in their strength, range of motion, and dynamic balance levels after a five-month detraining period. Self-reported PA decreased significantly during this time frame. Effective strategies are needed to increase PA levels in older people when systematic training programs are temporarily interrupted.

Validez y fiabilidad del cuestionario APAFOP en población española anciana e institucionalizada con deterioro cognitivo / Validity and reliability of the APAFOP questionnaire for Spanish institutionalized older adults with cognitive impairment / Validade e confiabilidade do questionário APAFOP para população idosa institucionalizada espanhola com comprometimento cognitivo

OBJETIVO: El número de cuestionarios de valoración de la actividad física diseñados para la población anciana es reducido. Ninguno de ellos ha sido validado en población española con deterioro cognitivo. Este estudio tuvo como objetivo identificar la validez y fiabilidad del cuestionario APAFOP en población española institucionalizada con deterioro cognitivo. MÉTODOS: Treinta y un individuos institucionalizados (edad media 84.75+/-7.2 años) contestaron el cuestionario dos veces en un intervalo de 24 horas (para establecer la confiabilidad test-retest). La validez de constructo del APAFOP se contrastó de manera directa mediante el empleo de un acelerómetro AciGraph modelo GT3X y de modo indirecto a través de las pruebas "Repeated chair stands", del cuestionario "12-Item Short-Form Health Survey" y del Índice de Barthel. RESULTADOS: Se encontró una correlación estadísticamente significativa entre la puntuación total del cuestionario APAFOP, la puntuación en counts/día y el número de pasos reflejados por el acelerómetro (r=0.701; Sig=0.001 y r=0.648; Sig=0.001 respectivamente). El cuestionario mostró una elevada confiabilidad test-retest y consistencia interna (CCI=0.985; IC=0.969-0.993). CONCLUSIONES: La versión adaptada al español del cuestionario APAFOP puede ser considerada como una herramienta válida y fiable para estimar el nivel de realización de actividad física en personas ancianas institucionalizadas con deterioro cognitivo

OBJECTIVE: The existing number of questionnaires specifically designed for assessing physical activity in Spanish elderly is scarce. None has been validated on individuals with cognitive impairment. This study aims at identifying the validity and reliability of the APAFOP questionnaire on a sample made up of institutionalized people with cognitive impairment. METHODS: Thirty-one people (mean age 83.84+/-7.55 years old) answered the questionnaire twice in an interval of 24 (test-retest reliability). The APAFOP's construct validity was directly assessed by means of an accelerometer AciGraph GT3X and indirectly assessed through the test Repeated chair stands, the 12-Item Short-Form Health Survey and the Barthel Index. RESULTS: A statistically significant correlation was found between the total score of the APAFOP and the counts/day and the number of steps provided by the accelerometer (r=0.701; Sig=0.001 and r=0.648; Sig=0.001 respectively). The questionnaire showed a high test-retest reliability (ICC=0.985; CI=0.969-0.993). CONCLUSIONS: The Spanish adapted version of the APAFOP questionnaire can be considered a valid and reliable tool for estimating the physical activity performed by institutionalized elderly people with cognitive impairment

OBJETIVO: O número atual de questionários elaborados, especificamente, para avaliar a atividade física em idosos espanhóis é escasso. Nenhum foi validado em indivíduos com comprometimento cognitivo. Este estudo tem como objetivo identificar a validade e confiabilidade do questionário APAFOP em uma amostra composta por pessoas institucionalizadas com comprometimento cognitivo. MÉTODO: Trinta e uma pessoas (idade média de 83.84 +/- 7.55 anos) responderam ao questionário duas vezes em um intervalo de 24 (confiabilidade teste-reteste). A validade de constructo da APAFOP foi diretamente avaliada através de um acelerômetro AciGraph GT3X e indiretamente avaliada através do teste de sentar e levantar, a versão curta do questionário SF-12 e o Índice de Barthel. RESULTADOS: Foi encontrada uma correlação estatisticamente significativa entre o escore total da APAFOP e as contagens / dia e o número de passos fornecidas pelo acelerômetro (r = 0.701; Sig = 0.001 e r = 0.648; Sig = 0.001, respectivamente). O questionário mostrou alta confiabilidade teste-reteste (CCI = 0.985; IC = 0.969-0.993). CONCLUSÕES: A versão adaptada em espanhol do questionário APAFOP pode ser considerada uma ferramenta válida e confiável para estimar a atividade física realizada por idosos institucionalizados com comprometimento cognitivo

Lesiones deportivas en baloncesto infantil femenino / Sports injuries in young female basketball

Introducción: el baloncesto es un deporte que presenta una gran aceptación entre las niñas preadolescentes, si bien poco se sabe sobre la incidencia de lesiones que su práctica tiene sobre esta población. Este trabajo tuvo como objetivo aportar información sobre el patrón de lesión deportiva encontrado en niñas preadolescentes practicantes de baloncesto a nivel federado en España. Material y métodos: durante el Campeonato de España de baloncesto infantil femenino de 2014, se recogió información acerca de ciertas características deportivas individuales de las jugadoras y del club, así como de los entrenamientos y del patrón lesivo, mediante entrevistas personales a los entrenadores y cuestionarios a las jugadoras. Resultados: se recogió información de 348 jugadoras. Un 73,8% reconoció haberse lesionado en la última temporada, mayoritariamente entrenando. El tipo de lesión más frecuentemente fueron los esguinces y la zona corporal el tren inferior, hallándose un 30% de recidivas. El índice lesivo fue de 5,85 lesiones por cada 1000 horas de práctica, y la superficie de juego fue el único factor que mostró tener influencia sobre el riesgo de lesión. El periodo de baja se situó en 2,54 ± 0,97 días, con una ausencia por parte del 25% de las jugadoras de sus actividades académicas. Conclusiones: la práctica de baloncesto por parte de niñas de entre 12 y 13 años presenta un riesgo de lesión que no debe pasar desapercibido, tanto por el promedio de lesiones registrado, como por la posibilidad de que existan recidivas y que la lesión acarree consecuencias a nivel académico (AU)

Introduction: basketball is a widely practiced sport among preadolescent girls, but the evidence regarding the incidence of injuries caused by its practice in this population is scarce. This study aimed to provide information about the pattern of sport injury in preadolescent girls, basketball federated players, in Spain. Material and methods: during the 2014 Spanish Basketball Championship for girls, information regarding different characteristics of the players and the team, as well as concerning the training sessions and the pattern of injury, was collected through questionnaires to the players and personal interview to the coaches. Results: information from 348 players was collected. A 73.8% of them, reported being injured in the last season, mainly during trainings. The most common type of injury were sprains, the most affected part of the body were the lower limbs, with a 30% of recurrences. Harm index (injuries for 1000 hours of practice) was 5.85, being the court's surface the only factor that showed to affect the risk of injury. The mean of lost days of sport practice due to injury was 2.54 ± 0.97, with an absence of the academic activities by 25% of the injured players. Conclusions: the practice of basketball by 12-13years old girls shows a risk of injury that should not go unnoticed, both for the average of injuries detected, as well as for the possibility of recurrence and the impact on the academic level (AU)