Journal of Dance Medicine & Science最新文献

Introduction: Dancers generally begin training in a variety of styles at a young age. Across ages and levels of participation, dancers are at high risk for injury. Most available injury surveillance tools, however, have been developed for adult populations. Valid, reliable tools that monitor injury and exposure of pre-adolescent dance populations are limited. Therefore, the purpose of this study was to determine the validity and reliability of a dance injury and participation questionnaire specifically for pre-adolescent private studio dancers.

Methods: Four stages of validity and reliability testing assessed a novel questionnaire: initial design based on previous literature, expert panel review, cognitive interviews, and test-retest reliability. The target population was 8 to 12-year-olds who participate in at least 1 class/week at a private studio. Feedback from a panel review and cognitive interviews was incorporated. Test-retest analyses included Cohen's kappa coefficients and percent agreement for categorical variables, and intraclass correlation coefficients [ICCs (3,1)], absolute mean difference (md) and Pearson's correlation coefficients (r) for numerical data.

Results: The final questionnaire was comprised of 4 sections: demographics, dance training history, current dance participation (previous 1-year and 4-months), and dance-related injury history (previous 1-year and 4-months). Items with categorical responses estimated kappa coefficients from 0.32 to 1.00, and percent agreement between 81% and 100%. For items with numeric responses, ICC estimates ranged between .14 and 1.00, r values between .14 and 1.00, and the largest absolute md was 0.46. The 4-month recall sections revealed higher agreement than the 1-year sections.

Conclusion: This valid pre-adolescent dance injury and participation questionnaire demonstrates good to excellent reliability across all items. To support participant completions, assistance from a parent/guardian is suggested. To move dance epidemiology research forward among private studio dancers aged 8 to 12 years, employment of this questionnaire is therefore recommended.

Background: Previous studies have made crucial steps toward developing a dance-specific balance test to challenge dancer's balance capabilities wherein positional characteristics, timing, as well as reach order were altered. However, the authentic performance nature of the protocols could be questioned.

Purpose: The aim of this study was to examine the effects of different tempo and order variations on the previously developed Dance-Specific Star Excursion Balance Test (dsSEBT).

Methods: Twenty- two female dancers voluntarily took part in the research (162.68 ± 6.57 cm; 61.35 ± 11.25 kg). This research looked at 3 different temporal variations as well as an alternate reach order, to the traditional order, to examine the effect it may have on individual spoke scores. Reach distances (% of limb length), center of pressure (cm²), and error scores were measured.

Results: Overall, the varying tempos did not create a significant change in any of the variables measured (P = .067-1.00) which suggests that dancers have a unique ability to adapt to temporal changes due to the nature of ever-changing tempos in class and performance. Additionally, the new reach order did not affect the difficulty level of each individual spoke, which agrees with previous research suggesting that the crossed side and crossed front spokes are in fact the most challenging spokes for ballet and contemporary dancers to accomplish.

Conclusion: Results support the utilization of all 8 spokes of the dsSEBT in identifying balance deficits in this genre of dancers. The data collected in this study provides useful baseline measurements to further develop a reliable dance-specific dynamic balance test protocol to be used by ballet and contemporary dancers.

Introduction: Dancing is one way of maintaining an active lifestyle, and online dance interventions in group settings can be a solution when in-person classes are impossible. This study investigated the feasibility and potential clinical effects of an online dance program for older adults with and without Parkinson disease (PD). Methods: Participants attended 2 weekly dance classes in the same videoconference room for 2 months. The dance activities were mainly performed while seated (around 75%). Researchers monitored feasibility (ie, adherence, attendance, and technological barriers) and safety. Pre- and post-intervention assessments investigated self-perceptions, effects on emotional domains, quality of life, activity-specific balance confidence, lower-limb functional mobility, and PD non-motor symptoms. Individuals also reported their self-perceptions regarding technology usability, enjoyment, and social interaction. Results: Most of the participants with PD (n = 12) had moderate PD (Hoehn & Yahr score) and presented a greater risk of falls when compared to participants without PD (n = 14). Overall, we found a high rate of adherence (100%), attendance (87.5%-91.7%), and safety (100%) for both groups. No falls or near-falls occurred during the sessions. Only the PD group ameliorated emotional domains (anxiety and depression) and improved lower-limb functional mobility. All participants reported feeling safe and perceived benefits, although over a third of older adults with PD reported moderate difficulties in using technology and in socializing with the group. Conclusion: This online dance protocol is feasible, safe, and a potential strategy to improve clinical parameters in older adults and people with moderate PD.

Background: Recent research has shown that dancing takes effect directly in improving mental health, by reducing rates of depression, anxiety, and enhancing the mood aspects in people of any age.

Aim: This systematic review aimed to search for evidence of the effects of dance interventions on adults' mental health.

Methods: The eligibility criteria of the studies were defined by following the PICOS strategy, considering the population, intervention, comparison, result, and the study design. Only randomized clinical trials, conducted in adults of both sexes, with results related to mental health, including depression and/or anxiety and/or stress and/or mood disorder were considered eligible for this review. The search was conducted using 5 databases: PubMed, Cochrane Library, Web of Science, Scopus, and ScienceDirect from 2005 to 2020. The Cochrane Collaboration tool was used to assess the risk of bias in randomized clinical trials. The synthesis and presentation of results followed the guidelines of the PRISMA model.

Results: Of 425 selected studies, 10 randomized clinical trials were included in the review with a total of 933 participants between 18 and 62 years old. Studies included Dance Movement Therapy, Latin dance, tango, rumba, waltz, Nogma, quadrille, and Biodanza. The results indicate that regardless of style, adults who participated in dance interventions showed a reduction in symptoms of depression, anxiety, and stress compared to groups that did not participate in any type of intervention.

Discussion: In general, studies showed an unclear risk of bias in most items assessed. Based on these studies, it is possible to assume that the practice of dance contributes positively to the maintenance or improvement of mental health in adults.

Introduction: Wearable technology (WT) has become common place in sport. Increased affordability has allowed WT to reach the wrists and bodies of grassroots and community athletes. While WT is commonly used by sport populations to monitor training load, the use of WT among dancers and dance teachers is unknown. Therefore, the purpose of this study is to explore the perspectives of dancers, dance teachers, and dance parents on using WT in the dance studio environment. Methods: Dancers (aged 14+), dance teachers (aged 18+), and dance parents (with a child <18 years registered in a dance program) were recruited from local dance studios (including those offering vocational programs and/or professional training opportunities), and dance retail stores. Participants provided informed consent/assent and completed a one-time online survey about their attitudes, self-efficacy, motivations, barriers, and current practices of using WT in the studio. Results: Sixty-seven participants (19 dancers, 32 dance teachers, and 16 dance parents) completed the survey. Attitudes toward using WT were similar across all groups (mean score range = 34-38/45). Thirteen dancers (68%), 29 teachers (91%), and 7 dance parents reporting on behalf of their children (47%) were permitted to use WT in the studio. Smartwatches were the most common WT used in the studio by dancers (7/9) and teachers (13/17), while dance parents reported that their children primarily used wristband activity trackers (3/4). Among all groups, the primary reason for using WT was to track personalized training data, with calories, total duration, and heart rate being the most important perceived metrics for improving dancing. Conclusion: Across all groups, attitudes toward WT were modest. Prevalence of WT use in the dance studio varied, with wrist-based gadgets being the most common. As WT research continues in dance populations, it will be important for future studies to consider studio permissions as well as participants' existing WT use practices.

Introduction: There is a dearth of information about whether lesbian, gay, bisexual, transgender, queer/questioning (LGBTQ+) dancers, who often experience increased psychosocial risk factors, are at increased risk of engaging in harmful behaviors compared to their heterosexual cisgender counterparts. This study explores harmful behaviors dancers engage in according to their self-reported sexual orientation and gender identity (SOGI), utilizing the validated Risky, Impulsive, and Self-Destructive Behavior Questionnaire (RISQ).

Methods: Three hundred sixty-four dancers from 7 elite dance entities in New York were contacted by e-mail to participate in the study. Sixty-six participants completed the study through a virtual questionnaire. Chi-square, ANOVA and independent t-test were utilized to assess statistical differences among RISQ outcomes in 4 SOGI groups: Cisgender Heterosexual Female (n = 20); Cisgender Heterosexual Male (n = 7); LGBTQ+ Female (n = 19); and LGBTQ+ Male (n = 20).

Results: Chi-square comparing SOGI group frequency of participation within each of the RISQ behaviors revealed statistically significant difference with: difficulty stopping eating (P = .05); gambling illegally (P = .036); betting on sports, horses, or other animals (P = .036); buying expensive items that cannot be afforded at the spur of the moment (P = .019); and drinking 5 or more alcoholic drinks in 3 hours or less (P = .013). Between-group frequency comparison through ANOVA and independent t-test revealed: the LGBTQ+ Male group were 92% more likely to have unprotected sex with someone they just met or did not know well (P < .001) and 83% more likely to use hallucinogens, LSD, or mushrooms (P = .018); the LGBTQ+ Female and LGBTQ+ Male groups were 4.4 times more likely to buy drugs (P = .01) and 4.88 times more likely to think about killing themselves (P = .023); and both male groups were 12.8 times more likely to steal money (P = .006).

Conclusions: This study found significant difference in RISQ scores based on a dancer's SOGI. Harmful behaviors should be taken into consideration when working to improve dancer patient outcomes and quality of life.

Introduction: Professional ballet dancers load their hips in extreme ranges of motion and commonly report hip pain. Evaluating gluteal muscle size and quality may help guide exercise programs. Objectives of this study were to compare gluteal muscle size and quality (fatty infiltration) in ballet dancers compared to athletes; and to investigate the relationship between gluteal muscle size and quality, and reports of hip-related pain.

Methods: This study was a case-control design. Professional ballet dancers (current and retired, n = 49, mean age 35 years, range 19-63) and age and sex-matched athletes (current and retired, n = 49) underwent magnetic resonance imaging of both hips. Muscle cross-sectional areas (CSA) were obtained at standardized landmarks for gluteus maximus (GMax) and gluteus medius (GMed). Full muscle volume was calculated for gluteus minimus (GMin). Fatty infiltration was rated using the Goutallier classification system. Muscle size was compared between groups using linear mixed models. Fatty infiltration was compared using a mixed model binary logistic regression. Hip-related pain, participation status, limb side and sex were included as covariates.

Results: Ballet dancers had significantly larger GMax (upper P < .01, middle P < .01, lower P = .01) and GMed (level of anterior inferior iliac spine P < .01, greater sciatic foramen P < .01) CSA and larger GMin volume (P < .01), when normalized to weight. There was no difference in fatty infiltration ratings between dancers and non-dancing athletes. Retired dancers and athletes reporting hip-related pain were more likely to have fatty infiltration in GMax lower (P = .04).

Conclusion: Gluteal muscles are larger in ballet dancers compared to athletes suggesting high-level loading of these muscles. There is no relationship between hip-related pain and gluteal muscle size. Dancers and athletes have comparable muscle quality.

Background: Due to its multiple benefits in Parkinson's Disease, Dance has been a widely recommended activity in rehabilitation. However, there is a gap in the literature on the use of Brazilian sytles in rehabilitation protocols. This study aimed to compare the effect of 2 different protocols of Brazilian dance, samba and forró, and samba on motor aspects and quality of life of individuals with Parkinson's disease.

Methods: In a nonrandomized clinical trial lasting 12 weeks, 69 individuals with Parkinson's disease participated in the study: forró and samba group (FSG = 23), samba group (SG = 23), and control group (CG = 23).

Results: Significant improvements were found after SG intervention in the UPDRSIII and in the subitem quality of life mobility. In intra-group comparisons of FSG, significant differences were found in the subtype of quality of life discomfort. In the intergroup analysis, significant differences were found between CG, SG, and FSG in the communication sub-item, showing a greater increase in the scores of the groups that participated in the SG and FSG.

Conclusions: The findings of this study suggest that Brazilian dance practice is capable of improving the perception of some aspects of quality of life and motor symptoms in relation to controls in people with Parkinson's disease.

Introduction: Neuromuscular warm-up programs, such as FIFA 11+ were developed as early as 2006. These programs have been effective in reducing the risk of injury in female athletes by decreasing the moments surrounding the knee and improving neuromuscular control during static and dynamic movements such as jumping and landing. In addition, they have been effective for improving jump height in soccer, volleyball, and basketball.

Methods: The effects of the 11+ Dance, a dance-specific neuromuscular warm-up program, was examined on jump height and lower extremity biomechanics during bilateral and single leg countermovement jumps in recreational dancers. Twenty female adolescents from 2 dance schools participated in this 2-centered 8-week controlled non-randomized trial. The intervention group (IG) performed the 11+ Dance program 3×/week for 8-weeks during the first 30-minute of their regularly scheduled dance classes. The control group (CG) continued with their regular dance classes routine. Ground reaction force and motion capture data were used to assess jump height and lower extremity biomechanics pre and post intervention.

Results: Both groups statistically increased their jump height (CG: Z = 1.89-2.45, P ≤ .0167; IG: Z = 2.18-2.76, P ≤ .0167). However, no statistical between group differences were observed (Z = 0.38-1.22, P > .05). During takeoff, the IG statistically reduced peak knee extension moments (t(18) = -3.04 to -3.77, P ≤ .0167) while increasing peak hip extension moments (t(18) = 2.16-2.79, P ≤ .05) and peak hip flexion angles (t(18) = 2.68-3.72, P ≤ .0167) compared to the CG. The IG also increased the hip flexion angles compared to the CG during landing (t(18) = 2.78-5.13, P ≤ .0167) while no systematic differences were observed in all other variables of lower extremity biomechanics.

Conclusion: The reduced joint load at the knee observed during takeoff needs further investigation. Neuromuscular training, such as the 11+ Dance, is supported by numerous quality research. Due to its simplicity, the 11+ Dance may be feasible and beneficial to complement regular warm-ups in recreational dance practice.

Objectives: Pre-professional dance is high-risk, with injury incidence up to 4.7 injuries/1000 dance hours. Pre-season screening measures have been utilized to assess risk factors for dance-related injury, however normative values haven't been established for a pre-professional ballet population. The purpose of this study was to establish normative values of ankle and hip joint range of motion (ROM), lumbopelvic control, and dynamic balance pre-season screening measures for pre-professional ballet dancers.

Methods: 498 adolescent pre-professional ballet dancers [n = 219 junior division (194 female, 25 male; mean age: 12.9±0.9 year); n = 281 senior division (238 female, 41 male; mean age: 16.8±1.5 year)] participated in baseline screening tests across 5 seasons (2015-2019). Baseline measures took place at the beginning of each academic year: ankle ROM [dorsiflexion (deg); plantarflexion (PF) (deg)], total active turnout (TAT) (deg), lumbopelvic control [active straight leg raise (ASLR) (score); one leg standing test (OLS) (score)], and dynamic balance [unipedal balance (sec); Y-Balance Test (cm)].

Results: Percentiles for ankle dorsiflexion ranged from 28.2° (male senior division, 10th percentile) to 63.3° (female junior division, 100th percentile). For PF, percentiles ranged from 77.5 to 111.8° (male junior division, 10th percentile; male senior division, 100th percentile). Percentiles for TAT for all participants ranged between 121.1° and 131.0°. For the ASLR, the proportion of participants moving with compensation (pelvis shifting) was between 64.0% and 82.2%. For OLS, 19.7% to 56.1% of dancers had a positive score (hip hiking). Percentiles for dynamic balance ranged from 3.5 to 17.1 seconds (unipedal dynamic balance) and 75.8 to 103.3 cm (YBT composite reach score) across all groups.

Conclusion: The establishment of normative values of pre-season screening measures among a pre-professional ballet population can be used to determine areas to target during training, recognize individuals with possible injury risk, and inform return to dance protocols following injury. Comparison with other dancer/athletic populations will also provide insight into the performance of dancers and identify areas in need of improvement.