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1.
J Int Soc Sports Nutr ; 17(1): 13, 2020 Mar 04.
Artículo en Inglés | MEDLINE | ID: mdl-32131846

RESUMEN

BACKGROUND: Low energy availability (LEA) is a medical condition observed in athletes, with a higher prevalence in aesthetic sports. For the first time, this study evaluated the relative prevalence of LEA in female elite athletes (ELA) and recreational athletes (REA) in aesthetic sports in China. METHODS: Female athletes from 6 sports (trampolining, rhythmic gymnastics, aerobics, dance sport, cheerleading and dance) were recruited, including ELA (n = 52; age = 20 ± 3) on Chinese national teams and REA (n = 114; Age = 20 ± 2) from Beijing Sport University. Participants completed 2 online questionnaires to assess LEA and eating disorder risk. These included the Low Energy Availability in Females Questionnaire (LEAF-Q), which provided information on injury history, gastrointestinal function and menstrual history, and the Eating Disorder Inventory-3 Referral Form (EDI-3 RF). For a sub-group of elite athletes (n = 14), body composition, bone mineral density, and blood serum were also quantified. RESULTS: A total of 41.6% of participants (n = 69) were at increased risk of LEA, and 57.2% of participants (n = 95) were classified as high in eating disorder risk. For ELA vs. REA, there was a significantly higher prevalence of LEA risk (55.8% vs. 35.1%; p = 0.012) and amenorrhea (53.8% vs. 13.3%; p < 0.001). Elite athletes at increased risk of LEA had significantly lower estradiol (p = 0.021) and whole-body BMD (p = 0.028). Pearson correlations indicated that the whole-body BMD (r = - 0.667, p = 0.009) correlated negatively with LEAF-Q score. CONCLUSIONS: Results of this study indicate that there is a risk of LEA in female Chinese athletes within aesthetic sports, and significantly higher prevalence of increased LEA risk observed in ELA than in REA. Chinese coaches and sports medicine staff working elite female athletes in aesthetic sports should develop strategies to reduce the prevalence of LEA.


Asunto(s)
Deficiencia Relativa de Energía en el Deporte/epidemiología , Fenómenos Fisiológicos en la Nutrición Deportiva , Adolescente , Amenorrea , Grupo de Ascendencia Continental Asiática , Atletas , Composición Corporal , Densidad Ósea , China , Estudios Transversales , Baile , Trastornos de Alimentación y de la Ingestión de Alimentos , Femenino , Gimnasia , Hormonas/sangre , Humanos , Prevalencia , Factores de Riesgo , Deportes , Encuestas y Cuestionarios , Adulto Joven
2.
Medicine (Baltimore) ; 99(4): e18685, 2020 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-31977859

RESUMEN

Physical inactivity is a worldwide public health problem, and it is a risk factor for several chronic diseases. Square dancing nightly may be an efficient way to promote physical activity among Chinese residents. This study aims to explore factors that affect resident participation in square dancing on the basis of social cognitive theory constructs (outcome expectations, outcome expectancies, self-efficacy, self-control, and environment) that may provide a scientific basis for designing interventions to promote physical activity in the future.Forty squares near neighborhood communities in Chongqing were randomly selected. A sample of 1732 residents who came to these squares at 18:00-21:00 were interviewed using a social cognitive theory questionnaire jointly developed by researchers from Chongqing Medical University and Jackson State University.Among 1732 respondents, 279 (16.1%) were male and 1457 (83.9%) were female. A total of 939 (54.2%) of the respondents were square dancers. The mean age of the dancers was 58.6 (SD = 9.1) years. Of the dancers, 825 (87.9%) danced at least 150 minutes every week, and 792 (84.2%) indicated that they had danced for more than 1 year. All the constructs of social cognitive theory were significantly different between residents whether they danced or not (P < .001 for all). Women (OR = 1.54, 95% CI: 1.03-2.31) were more likely to dance. Nonretired residents (OR = 0.53, 95% CI: 0.39-0.74) were less likely to dance. Residents with income of more than CNY 4000 per month were less likely to dance (OR = 0.44, 95% CI: 0.23-0.86). Residents with high self-efficacy (OR = 2.01, 95% CI: 1.81-2.22), and high self-control (OR = 1.26, 95% CI: 1.18-1.34) were more likely to dance.This study provides salient implications for developing interventions to promote square dancing by using social cognitive theory. Gender, retirement, income, and self-efficacy would be the factors influencing whether residents participate in square dancing.


Asunto(s)
Baile/psicología , Conducta Social , Anciano , China , Estudios Transversales , Ejercicio Físico , Femenino , Humanos , Masculino , Persona de Mediana Edad , Jubilación/estadística & datos numéricos , Autoeficacia , Factores Sexuales , Factores Socioeconómicos
3.
J Sports Sci ; 38(2): 231-237, 2020 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-31718476

RESUMEN

Excessive forces and/or loading rates during landing may place ballet dancers at risk for overuse injury. The ability to estimate and monitor the landing forces of ballet dancers could help to improve injury prevention and rehabilitation; however, force platforms are not conducive to testing outside of a laboratory. Fortunately, it may be possible to indirectly assess landing forces via a wearable accelerometer. The purposes of this study were to examine the relationship between impact accelerations, recorded via a pelvis-worn accelerometer, and the peak forces and loading rates during performance of a common ballet manoeuvre, and to examine if a wearable accelerometer is sensitive to fatigue-related changes in landing forces. Fifteen ballet dancers continuously performed a ballet manoeuvre until self-determined exhaustion while impact accelerations and landing forces were simultaneously recorded using an accelerometer and force platforms. We observed very strong, positive relationships between the impact accelerations and the peak forces and loading rates during the landings. In addition, the changes in impact accelerations with fatigue paralleled the changes in the peak forces and loading rates. As a result, it appears that a wearable accelerometer could be used to estimate and monitor landing forces in ballet dancers.


Asunto(s)
Acelerometría/instrumentación , Baile/fisiología , Dispositivos Electrónicos Vestibles , Adolescente , Fenómenos Biomecánicos , Trastornos de Traumas Acumulados/prevención & control , Baile/lesiones , Femenino , Humanos , Fatiga Muscular/fisiología , Estrés Mecánico , Adulto Joven
4.
Proc Natl Acad Sci U S A ; 117(2): 936-942, 2020 01 14.
Artículo en Inglés | MEDLINE | ID: mdl-31871195

RESUMEN

Music and dance are universal across human culture and have an ancient history. One characteristic of music is its strong influence on movement. For example, an auditory beat induces rhythmic movement with positive emotions in humans from early developmental stages. In this study, we investigated if sound induced spontaneous rhythmic movement in chimpanzees. Three experiments showed that: 1) an auditory beat induced rhythmic swaying and other rhythmic movements, with larger responses from male chimpanzees than female chimpanzees; 2) random beat as well as regular beat induced rhythmic swaying and beat tempo affected movement periodicity in a chimpanzee in a bipedal posture; and 3) a chimpanzee showed close proximity to the sound source while hearing auditory stimuli. The finding that male chimpanzees showed a larger response to sound than female chimpanzees was consistent with previous literature about "rain dances" in the wild, where male chimpanzees engage in rhythmic displays when hearing the sound of rain starting. The fact that rhythmic swaying was induced regardless of beat regularity may be a critical difference from humans, and a further study should reveal the physiological properties of sound that induce rhythmic movements in chimpanzees. These results suggest some biological foundation for dancing existed in the common ancestor of humans and chimpanzees ∼6 million years ago. As such, this study supports the evolutionary origins of musicality.


Asunto(s)
Conducta Animal/fisiología , Baile/fisiología , Movimiento/fisiología , Pan troglodytes/fisiología , Sonido , Animales , Percepción Auditiva/fisiología , Evolución Biológica , Baile/psicología , Femenino , Humanos , Masculino , Música , Pan troglodytes/psicología , Periodicidad , Postura , Factores Sexuales
5.
Acta Neurol Scand ; 141(1): 90-97, 2020 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-31613387

RESUMEN

OBJECTIVES: To evaluate effects of a six-month intensive dance-exercise intervention (DI) on cognition and brain structure in a mixed group of healthy seniors and people with mild cognitive impairment. METHODS: Subjects (aged Ëƒ 60 years with no dementia or depression) were randomly assigned to either a DI group or a life as usual (LAU) group. Detailed neuropsychological testing, measures of physical fitness and brain MRI encompassing T1 structural and diffusion tensor imaging (DTI) were performed at baseline and after 6 months. We assessed changes in cortical thickness and DTI parameters derived from tract-based spatial statistics. RESULTS: Altogether 62 individuals (n = 31 in the DI group) completed the protocol. The groups were matched for their demographic and clinical variables. After 6 months, we found significant cortical thickening in the right inferior temporal, fusiform and lateral occipital regions in the dancers compared to controls. Significant increases of radial and mean diffusivity were observed in various white matter tracts in the dancers; however, no differences were observed between the DI and LAU groups. The DI group as compared to the LAU group showed subtle improvements in executive functions. CONCLUSIONS: We observed DI-induced improvement in executive functions and increases of cortical thickness in the lateral occipitotemporal cortex which is engaged in action observation, visuomotor integration and action imitation, that is activities that are all important for motor learning and executing skilled movements.


Asunto(s)
Encéfalo , Cognición , Baile , Terapia por Ejercicio/métodos , Anciano , Imagen de Difusión por Resonancia Magnética , Femenino , Humanos , Masculino , Persona de Mediana Edad , Pruebas Neuropsicológicas
6.
Licere (Online) ; 22(4): 195-223, dez.2019. ilus
Artículo en Portugués | LILACS | ID: biblio-1049796

RESUMEN

Buscamos refletir como o Araruna se revela como um fenômeno de lazer, identificando os sentidos lúdicos existentes nas expressões culturais dos corpos brincantes. Identificamos que os sentidos lúdicos estão presentes nas danças e também nas outras práticas corporais, como a festa junina, o carnaval, o cinema, dentre outras atividades que o Grupo realizou ao longo de sua existência. As danças e demais práticas corporais da cultura de movimento do Araruna, quando contrastadas com a esfera do lazer, trazem vários fatores que a fazem relacionar-se a esse aspecto importante do viver e isso pode ser observado a partir das expressividades dos brincantes. Tais sentidos lúdicos do Araruna dialogam com as diferentes facetas do lazer, possibilitando novas ideias para o universo da dança.


We seek to reflect how the Araruna reveals itself as a leisure phenomenon, identifying the playful senses that exist in the cultural expressions of the players bodies. We identified that the playful senses are present in dances and also in other bodily practices, such as the June party, carnival, cinema, among other activities that the Group has carried out throughout its existence. The dances and other corporal practices of Araruna's movement culture, when contrasted with the sphere of leisure, bring several factors that make it relate to this important aspect of living and this can be observed from the expressiveness of the players. Such playful senses of Araruna dialogue with the different facets of leisure, enabling new ideas for the dance universe.


Asunto(s)
Humanos , Socialización , Características Culturales , Baile , Difusión de la Información , Transculturación
7.
Artículo en Inglés | MEDLINE | ID: mdl-31484349

RESUMEN

Hip hop is a popular form of competitive and recreational sport worldwide, but studies rarely investigate injury prevalence and factors associated with injury occurrence in this sport. This study aimed to prospectively examine injury occurrence in hip hop dancers in a three-month period and to evaluate potential predictors of injury occurrence in hip hop dancers. The participants were 129 competitive hip hop dancers (114 females, 17.95 ± 4.15 years of age). Study predictors were obtained at study baseline and included sociodemographic factors, sport-related factors, previous injury status, anthropometric and body build indices (body height, mass, body mass index, and body composition variables), and dynamic balance performance (obtained by the Star Excursion Balance Test-SEBT). The outcome was injury occurrence, which was prospectively observed once a week by the Oslo Sports Trauma Research Center Overuse Injury Questionnaire (OSTRC). During the course of the study, 101 injuries occurred, equating to an annual injury incidence of 312%. On average, each dancer suffered 0.78 injuries (95% Confidence Interval (95% CI): 0.61-0.97) across a study period of three months (0.76 (95% CI: 0.60-0.95) and 0.93 (95% CI: 0.75-1.13), in females and males, respectively; Mann Whitney Z-value: 0.68, p = 0.52). Seventeen percent of dancers suffered multiple injuries, and 49% of all injuries were time-loss injuries. The knee was the most frequently injured body location (42% of all reported injuries), followed by the back region (32%) and the ankle (15%). Previous injury was a strong predictor of injury occurrence (Odds Ratio: 3.76, 95% CI: 1.87-4.59). Lower injury risk was evidenced among those participants who achieved better scores on several SEBT variables, irrespective of gender and previous injury status; with no significant influence of anthropometric and body build variables on injury occurrence. This study highlighted a high injury rate in hip hop dancers. Dancers and coaches should be informed about the certain protective effects of dynamic balance on the prevention of musculoskeletal injury in hip hop in order to assure safe and effective practices. The usage of SEBT as a convenient and cheap testing procedure is encouraged in other dance disciplines.


Asunto(s)
Traumatismos en Atletas/epidemiología , Baile , Enfermedades Musculoesqueléticas/epidemiología , Adolescente , Adulto , Pesos y Medidas Corporales , Femenino , Humanos , Incidencia , Masculino , Prevalencia , Estudios Prospectivos , Encuestas y Cuestionarios , Adulto Joven
8.
Hum Mov Sci ; 67: 102512, 2019 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-31493622

RESUMEN

Due to the redundant degrees of freedom (DOF) and nonlinearity of reactional kinetic elements within the human motor apparatus, controlling the complex dynamics of the human musculoskeletal system presents considerable difficulties. Based on this challenge, Bernstein (1967) viewed skill development as the process whereby the central nervous system (CNS) gains mastery of kinematic DOF and kinetic reactional elements (passive forces, moments etc.), with the highest level of skill characterised by optimal exploitation of reactional elements in the achievement of movement goals. A previous kinematic investigation into coordination differences in a complex multidirectional dance sequence demonstrated that general unfreezing of kinematic DOF occurred as dance skill progressed (Chang et al., submitted for publication). To gain insight into the role of angular reactional elements in skill, the present kinetic study investigated angular momentum and associated variables across three skill levels (beginners, intermediates, experts) within this same complex dance sequence. The results showed that the angular momenta of segments and accompanying angular reactional elements generally increased with skill level. More specifically, the findings suggested that while improvements in movement economy from cancellation of angular momentum between body segments occur early in skill progression, later in skill progression, experts utilise increased whole-body angular momentum. Although this is energetically expensive, it may enhance the aesthetic value of dance movements, and/or have mechanical advantages. Overall, the findings here provide support for Bernstein's (1967) model of skill development. Future research should quantify the relations between energy expenditure, key biomechanical variables that reflect skill and dance aesthetics as perceived by audiences.


Asunto(s)
Baile/fisiología , Destreza Motora/fisiología , Adolescente , Adulto , Fenómenos Biomecánicos/fisiología , Femenino , Humanos , Cinética , Masculino , Movimiento (Física) , Movimiento/fisiología , Adulto Joven
9.
Med Probl Perform Art ; 34(3): 132-140, 2019 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-31482171

RESUMEN

OBJECTIVE: This study examined intra- and inter-individual variability in upper limb movements of ballet dancers when performing flapping swan-wing movements, and it assessed differences in joint angles of upper limbs between dancers of different skill levels. METHODS: 23 female ballet dancers (3 professional, 6 advanced, and 14 intermediate dancers) and 21 age-matched females without previous dance experience participated in this study. Thirty-three reflective markers were attached to each participant's trunk and upper limbs, and the flapping upper limb motions from Swan Lake were subsequently captured with eight optical cameras. Peak values of upper limb joint angles (shoulder, elbow, and wrist joint) were obtained, and intra- and inter-individual movement variability of each joint angle were compared between groups. RESULTS: In joint angles of the shoulder, elbow, and wrist, there were few differences among professional, advanced, and intermediate groups. The intra-individual movement variability in upward arm movements was significantly larger for professional and control groups than for advanced and intermediate groups, while in downward arm movement, variability became significantly smaller as technical level increased. Moreover, inter-individual movement variability was larger in the upward arm movement as technical level increased, and smaller in the downward arm movement for the professional group. The results suggested that the upward arm movements reflect dancers' individual expression, while the downward arm movements reflect their technical competence at this swan-like movement. CONCLUSION: The complicated swan-like movements performed by skilled dancers in this study indicate that they execute expressive and technical components in sequence.


Asunto(s)
Baile , Movimiento , Baile/fisiología , Femenino , Humanos , Articulaciones , Extremidad Superior/fisiología
10.
Med Probl Perform Art ; 34(3): 141-146, 2019 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-31482172

RESUMEN

AIMS: The popliteus musculotendinous unit plays the major role in range of motion, rotation and stabilization of the knee. Frequent repetition of the rotational strains such as turnout in dancers may be the cause of popliteus tendinitis. In addition, popliteus sulcus depth (PSD) and PSD/lateral condyle width (LCW) ratio are also highly related with popliteal tendinitis in professional folk dancers. In this study, we evaluated the association between clinically diagnosed popliteus tendinitis and PSD with analysis of the PSD/LCW ratio as measured on MRI and tibiofemoral rotational alignment in professional folk dancers. This study was intended to clarify any anatomical liability to popliteal tendinitis in professional folk dancers. Therefore, we looked for the anatomical variances affecting popliteal musculotendinous unit. METHODS: Thirty-two MRI scans from 32 members of a professional folk dance group (mean age 30.2±7.9 yrs, range 18-38) were analyzed retrospectively. Popliteal tendinitis was detected in 5 knees (5 dancers). The relationship of popliteal tendinitis to the tibiofemoral rotational angles (condilary twist angle, posterior codilary angle, posterior tibiofemoral angle), PSD, and PSD/LCW ratio were investigated. RESULTS: The popliteus tendinitis group had statistically significantly higher PSD and PSD/LCW ratio than the group without popliteal tendinitis (p=0.0001). There was no statistically significant difference between the two groups in the tibiofemoral rotational angles. CONCLUSION: In addition to long hours of practice and the turnout position, PSD and PSD/LCW ratio can place the professional folk dancer at increased risk for popliteus tendon injury.


Asunto(s)
Baile , Tendinopatía , Adolescente , Adulto , Baile/lesiones , Humanos , Articulación de la Rodilla , Imagen por Resonancia Magnética , Rango del Movimiento Articular , Estudios Retrospectivos , Tendinopatía/diagnóstico por imagen , Tendinopatía/etiología , Adulto Joven
11.
Med Probl Perform Art ; 34(3): 147-153, 2019 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-31482173

RESUMEN

OBJECTIVE: Low back pain (LBP) is common in dancers. A biopsychosocial model should be considered in the aetiology of LBP, including a dancer's general beliefs of the low back and movements of the spine. This study aimed to determine pre-professional dancers' beliefs about their lower back in general and dance-specific movements of the spine and to explore whether these beliefs were influenced by a history of disabling LBP. METHODS: 52 pre-professional female dancers (mean age 18.3 [1.4] yrs) were recruited and reported whether they had a history of disabling LBP and completed the Back Pain Attitudes Questionnaire (Back-PAQ) and a dance movement beliefs questionnaire. A linear mixed model was applied to determine the effect of a history of disabling LBP on dancers' beliefs (p<0.05). RESULTS: 20 dancers reported a history of disabling LBP. Regardless of this LBP history, dancers held generally negative beliefs as measured by the Back-PAQ (p=0.130). A history of disabling LBP did not influence dancers' perceived movement safety of all tasks (p=0.867), and dancers held negative beliefs towards extension activities. These beliefs were linked to the conceptions of perceived risk of damage and the need to protect the lower back. CONCLUSIONS: Dancers hold negative general beliefs around the low back and low back movements, regardless of a history of disabling LBP. Dancers perceive extension activities as more dangerous than flexion activities. These beliefs may reflect a combination of pain experience and beliefs specific to dance.


Asunto(s)
Baile , Dolor de la Región Lumbar , Adulto , Baile/lesiones , Femenino , Humanos , Movimiento , Rango del Movimiento Articular , Encuestas y Cuestionarios , Adulto Joven
12.
Med Probl Perform Art ; 34(3): 154-160, 2019 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-31482174

RESUMEN

AIMS: Although balance is a key element of dance, it remains to be confirmed which balance components are associated with dance performance. The aim of this study was to assess the associations between different field balance tests and dance performance in an in-house measure in ballet, contemporary, and jazz genres. METHODS: 83 female undergraduate dance students (20±1.5 yrs, 163.04±6.59 cm, 60.97±10.76 kg) completed the Star Excursion Balance Test (SEBT), the airplane test, a dance-specific pirouette test, the modified Romberg test, and the BioSway™ Balance System. Results from these balance tests were compared to the participants' technique and repertoire performance scores in ballet, contemporary, and jazz genres. RESULTS: Ballet scores were best predicted by SEBT 90° and Romberg for technique (r=0.4, p=0.001, SEE ±2.49) and Romberg, SEBT 90°, and SEBT 225° for repertoire (r=0.51, p=0.001, SEE±1.99). Contemporary data indicated SEBT 90° and Romberg for technique (r=0.37, p=0.001, SEE±2.67) and SEBT 225° for repertoire (r=0.27, p=0.015, SEE±2.29). Jazz indicated SEBT 90°, Romberg, SEBT 315°, and SEBT 225° for technique (r=0.51, p=0.001, SEE±2.28) and SEBT 225° and Romberg for repertoire (r=0.41, p=0.001, SEE±2.29). CONCLUSION: The present study suggests that balance ability has a limited influence on dance performance, with existing field balance tests demonstrating low to moderate associations with dance technique and repertoire.


Asunto(s)
Baile , Equilibrio Postural , Adolescente , Femenino , Humanos , Estudiantes , Adulto Joven
13.
Med Probl Perform Art ; 34(3): 161-168, 2019 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-31482175

RESUMEN

BACKGROUND: Dancers are skilled athletes who train, rehearse, and perform extensively and often repeat the same sequences of movements in class or while learning and rehearsing choreography. Fatigue is thought to be related to an increased risk of injury due to altered movement patterns and distributions of joint forces. However, little research has examined the effects of fatigue on dance performance. AIMS: The purpose of this study was to review the relevant literature and characterize what is known about how the movement patterns of trained dancers are affected by induced acute physical fatigue. METHODS: Four electronic databases were searched for studies that investigated any protocol or method designed to induce acute fatigue and examined the effects fatigue had on dancers. Two reviewers independently assessed the methodological quality of and extracted data from the included studies. RESULTS: Of 440 search results, 12 studies were included in the final review. The mean score for methodological quality was 9.2/13. A variety of methods have been used in an effort to induce fatigue in dancers, but many of the fatigue protocols or movements studied were not specific to dance or have not been studied using a functional approach. Several studies identified changes in mechanics after fatigue, but a consistent pattern is not yet apparent in the literature. CONCLUSIONS: Studies examining fatigue in dancers have found contradictory results in terms of shifting contributions from the lower extremity joints, indicating that more research is needed to determine the effects of fatigue on jump mechanics in dancers.


Asunto(s)
Baile , Fatiga , Movimiento , Fenómenos Biomecánicos , Baile/fisiología , Humanos , Extremidad Inferior
14.
Int J Occup Med Environ Health ; 32(5): 585-593, 2019 Oct 16.
Artículo en Inglés | MEDLINE | ID: mdl-31543518

RESUMEN

Lower extremities, especially the knee region, are susceptible to traumatic injuries because of long-lasting hard landings and impacts. Most of the injuries described in the literature are associated with ballet. In this review study, the authors tried to present the traumatic knee injury patterns of the Anatolian folk dance. The Fire of Anatolia dance group consists of 82 dancers (37 males [45.1%] and 45 females [54.9%]) with the mean age of 27.96 (SD = 5.05) years (range: 18-38 years). The major folk dances of the region are Zeybek, Halay, Horon, Teke, Roman, Karsilama, Bar and Lezginka ("the Caucasian"). The dancers suffered from 9 orthopedic injuries requiring surgical treatment (3 meniscus tears, 4 anterior cruciate ligament tears, 1 posterior cruciate ligament tear, 1 patellar dislocation) during a 10-year period. The authors investigated solely the traumatic injuries of these folk dance styles and aimed at revealing the traumatic knee injury patterns in this case series and literature review. On the one hand, the Anatolian folk dancers experienced meniscus tears following frequent squats and twists on single leg stances, typical of Horon and Zeybek. On the other hand, anterior cruciate tears happened after jumps and landings in the Caucasian (Lezginka jump) dance. A posterior cruciate ligament tear was also seen after the Caucasian dance landing. The split figure in the Karsilama dance ended up with patellar dislocation. Certain dance figures seem to be related to specific types of injuries. Int J Occup Med Environ Health. 2019;32(5):585-93.


Asunto(s)
Baile/lesiones , Traumatismos de la Rodilla/epidemiología , Traumatismos Ocupacionales/epidemiología , Adulto , Lesiones del Ligamento Cruzado Anterior , Femenino , Humanos , Traumatismos de la Rodilla/etiología , Masculino , Traumatismos Ocupacionales/etiología , Turquia/epidemiología
15.
J Dance Med Sci ; 23(3): 91-96, 2019 Sep 01.
Artículo en Inglés | MEDLINE | ID: mdl-31500690

RESUMEN

Inadequate levels of vitamin D may lead to poor performance in professional dancers. Therefore, dietary supplementation may be essential in this population. This longitudinal pilot study to a randomized controlled trial assessed dancer compliance with self-directed oral vitamin D supplementation. Seventy-one dancers, 41 females and 30 males with a mean age of 31.1 years, were recruited from The Royal Ballet, London. Baseline serum 25(OH)D levels were measured and dancers were interviewed, examined, and provided with oral supplements for the winter period, November 2011 to March 2012. Dancers with normal serum 25(OH)D levels were provided with maintenance supplements (1,000 IU/ day) and those with insufficient or deficient serum 25(OH)D levels were given a loading dose of 60,000 IU weekly for 2 and 6 weeks, respectively. Serum 25(OH) D levels were measured at 1 and 2 years and dancers were sampled for compliance with instructions. Mean compliance during loading and maintenance was 86% and 50%, respectively. Mean serum 25(OH)D levels at start and end of the study period were 79.3 ± 31.6 nmol/L and 78.68 ± 19.8 nmol/L, respectively. Only one-third of dancers with insufficient (N = 5) and deficient (N = 5) serum vitamin D levels improved to normal values. It is concluded that professional ballet dancers demonstrate good compliance with self-directed loading doses of vitamin D supplementation but poor compliance with maintenance doses. Poor maintenance compliance may have accounted for the low rates of serum vitamin D level improvement among dancers with insufficient or deficient levels.


Asunto(s)
Colecalciferol/uso terapéutico , Baile/fisiología , Suplementos Dietéticos , Cooperación del Paciente/estadística & datos numéricos , Deficiencia de Vitamina D/tratamiento farmacológico , Adulto , Relación Dosis-Respuesta a Droga , Femenino , Humanos , Masculino , Proyectos Piloto , Estaciones del Año , Vitamina D/análogos & derivados , Vitamina D/sangre , Deficiencia de Vitamina D/sangre , Deficiencia de Vitamina D/prevención & control
16.
J Dance Med Sci ; 23(3): 97-103, 2019 Sep 01.
Artículo en Inglés | MEDLINE | ID: mdl-31500691

RESUMEN

There is a high incidence of tobacco use and sleep-related problems among dancers; however, data that explore this interaction in dance students are scarce. The purpose of this study was to analyze nicotine dependence based on the subjective quality of sleep reported by dance students. A total of 116 conservatory students participated in the study. The Pittsburgh Sleep Quality Index (PSQI) and the Fagerström Test for Nicotine Dependence were used to collect data in November 2017. Of the sample, 59.5% reported poor sleep quality (PSQI scores > 5) with no difference according to gender (p = 0.092), while 20.7% said they smoked, again with no gender difference (p = 0.305). In comparison with non-smokers, smokers scored higher on the PSQI (p = 0.001), slept fewer hours (p = 0.05), took longer to fall asleep (p = 0.001), had worse sleep efficiency (p < 0.001), and more diurnal dysfunctions due to sleep deprivation (p = 0.023). In comparison with non-smokers there was a risk [OR = 4.39] of smokers presenting with poor sleep quality. It is concluded that the data support the need to consider tobacco use and sleep problems in conservatory training programs in order to improve the health and performance of dance students.


Asunto(s)
Baile/fisiología , Trastornos del Sueño-Vigilia/epidemiología , Tabaquismo/epidemiología , Adulto , Comorbilidad , Femenino , Humanos , Masculino , Autoinforme , España , Estudiantes/estadística & datos numéricos , Encuestas y Cuestionarios , Adulto Joven
17.
J Dance Med Sci ; 23(3): 104-111, 2019 Sep 01.
Artículo en Inglés | MEDLINE | ID: mdl-31500692

RESUMEN

The aim of this study was to describe and compare the different character sub-types of Javanese dance from a biomechanical perspective. One professional dancer was asked to repeat a basic motion (standing-up) according to the movement rules that pertain to six character sub-types (humble-refined, proud-refined, humble-strong, proud-strong, monkey, and bird). A motion capture system consisting of seven infrared cameras with a sample rate of 100 Hz and two force plates with a sample rate of 1,000 Hz were used to capture kinematics and kinetics. There were significant differences in the bio-mechanical values we calculated for each character sub-type: range of motion, angular velocity, and ground reaction forces. The refined sub-types (humble-refined and proud-refined) showed the lowest values at the knee joint for range of motion and the lowest ankle, shoulder, and wrist angular velocities. This result suggests that low values in these measurements are related to the smooth movements of refined sub-types. These measurements help describe and contrast the motion patterns of Javanese dance, contributing both to the scientific analysis of Javanese dance and the application of biomechanics to the study of dance more generally.


Asunto(s)
Fenómenos Biomecánicos/fisiología , Baile/fisiología , Articulaciones/fisiología , Rango del Movimiento Articular/fisiología , Soporte de Peso/fisiología , Femenino , Humanos , Indonesia , Extremidad Inferior , Movimiento/fisiología
18.
J Dance Med Sci ; 23(3): 112-125, 2019 Sep 01.
Artículo en Inglés | MEDLINE | ID: mdl-31500693

RESUMEN

This systematic review examines the relationship between injury and two stages of a dancer's career development: when transitioning to full-time training and to a professional dance company. The findings are discussed in relation to managing transitioning loads with regard to injury prevention. Six electronic databases (PubMed, Embase, CINAHL, SPORTDiscus, Scopus, and Performing Arts Periodicals Database) were searched from inception to July 2018, inclusive of English language peer reviewed studies investigating injury in pre-professional and professional ballet and contemporary dancers. Seventeen studies met the inclusion criteria. "Limited" evidence revealed that dancers transitioning to professional ballet had a significantly higher rate of time-loss injuries per exposure hour relative to established professionals, whereas transitioning professional contemporary dancers had a significantly lower rate of both medical-attention and time-loss injuries. "Limited" evidence also showed a decreased rate and trend toward lower prevalence rates for time-loss injuries per exposure hour for transitioning ballet students and an increased rate of medical-attention injury in a combined cohort of transitioning ballet and contemporary dance students. Thus, this review provides some evidence that injuries tend to occur as dancers are transitioning to full-time ballet or contemporary dance training or to professional careers.


Asunto(s)
Traumatismos en Atletas/clasificación , Traumatismos en Atletas/epidemiología , Baile/lesiones , Baile/estadística & datos numéricos , Femenino , Humanos , Masculino , Rango del Movimiento Articular , Factores de Riesgo
19.
J Dance Med Sci ; 23(3): 126-132, 2019 Sep 01.
Artículo en Inglés | MEDLINE | ID: mdl-31500694

RESUMEN

Due to frequent movements involving extreme hip amplitudes, ballet dancers often present with hip pain and chondrolabral lesions as seen in femoroacetabular impingement. The lesions appear even with normal anatomy. Diagnosis is often delayed, and treatment is challenging, especially in skeletally immature patients. This study reports the case of an adolescent ballet dancer suffering from a large symptomatic labral tear. The literature has also been reviewed for context regarding the pathophysiology and current therapeutic management of these injuries.


Asunto(s)
Acetábulo/lesiones , Cartílago Articular/lesiones , Baile/lesiones , Acetábulo/diagnóstico por imagen , Adolescente , Cartílago Articular/diagnóstico por imagen , Lesiones de la Cadera/diagnóstico por imagen , Articulación de la Cadera , Humanos
20.
J Clin Neurosci ; 70: 47-54, 2019 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-31526677

RESUMEN

OBJECTIVE: This work aimed to assess effects of different exercise intervention on Parkinson's disease (PD) treatment via a network meta-analysis. METHODS: Eligible literatures were retrieved from three databases (PubMed, EMBASE and Cochrane Library) up to March 5, 2019 and screened based on established selection criteria. Afterwards, relevant data was extracted and heterogeneity tests were conducted to select appropriate effect models according to chi-square test and I2 statistics. Publication bias of included studies was also performed. Finally, the pairwise and network meta-analyses were carried out to evaluate the efficacy of different exercise training on PD management. RESULTS: Overall, 19 studies encompassing 920 PD patients were identified to explore effects of interventions such as dance, Qigong, tango, resistance training (RT), Taichi and yoga on PD in terms of six indicators including six-minute walk, gait velocity, UPDRS III, PD questionnaire-39 (PDQ-39), timed up and go (TUG) and Berg balance test (BBT). The direct meta-analysis revealed that RT and dance altered the gait velocity and PDR-39 indicator of PD patients. And there was a statistical difference in RT and Tango regarding UPDRS III. Besides, significant differences were also detected among multiple comparisons based on TUG and BBT, containing RT vs control, Tai Chi vs control and Tango vs control for TUG, and dance vs control for BBT. Finally, results of network meta-analysis implied that tango was a good exercise for PD patients according to six different outcome measures. CONCLUSION: Tango was an optimal and effective option for improving functional mobility of PD patients.


Asunto(s)
Baile , Terapia por Ejercicio/métodos , Enfermedad de Parkinson/rehabilitación , Humanos , Metaanálisis en Red
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