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CIENCIAS
DE LA SALUD
medicina - fisioterapia - actividad física - psicología - etc.
Effects of eliminating visual cues on kinetic and kinematic parameters in back tuck somersault: A comparison between artistic gymnasts and parkour athletes
Autor
Abahnini, N. M. et al.
2023
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Acta of Bioengineering and Biomechanics
Tipo de publicación
Artículo de revista
Idioma
Inglés
Palabras clave
artistic gymnasts; motion analysis; open/closed eyes; parkour athletes; standing back tuck somersault
Resumen
Purpose: The aim of this study was to compare the effect of vision (i.e., open and closed eyes) on the kinetic and kinematic parameters of the standing back tuck somersault (SBTS) in artistic gymnasts and parkour athletes. Methods: Eleven male parkour athletes (age 22.53±2.36 years; height 1.72±0.08 m; weight 69.58±3.72 kg) and seven male artistic gymnasts (age 21.96±2.64 years; height 1.62±0.02 m; weight 63.54±1.35 kg) participated in this study. Each subject was asked to perform the SBTS in the same condition (i.e., first open-eyes then closed-eyes). 2D kinetic and kinematic analysis was conducted. Results: The results showed significant interaction (i.e., vision and sport) obtained at the take-off angle (p<0.05 and d=1.992), horizontal displacement (p<0.05 and d=1.906), and technical execution (p[removed]0.05). However, the elimination of vision during SBTS only affected parkour athletes (i.e., landing angle, ground reaction force, vertical velocity and technical execution, p[removed]1.20) while artistic gymnasts remain unchanged. Conclusion: We conclude that the specificity of the practice in each of the two sports disciplines influences the kinetic and kinematic control of the SBTS and suggests that with closed-eyes, the integration of afferent information relating to the vestibular and proprioceptive systems is different and specific to each discipline’s goal. Artistic gymnasts seem to be better skilled in the mechanical and technical control of the SBTS than parkour athletes.
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Analysis of Fluency of Movement in Parkour Using a Video and Inertial Measurement Unit Technology
Autor
Feletti, F. et al.
2023
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Journal of Human Kinetics
Tipo de publicación
Artículo de revista
Idioma
Inglés
Palabras clave
athletic gestures; injury; motor skills; sports science; training
Resumen
Fluency is a movement parameter combining smoothness and hesitation, and its objective measurement may be used to determine the effects of practice on sports performance. This study aimed to measure fluency in parkour, an acrobatic discipline comprising complex non-cyclical movements, which involves fluency as a critical aspect of performance. Inter-individual fluidity differences between advanced and novice athletes as well as intra-individual variations of fluency between different parts and subsequent repetitions of a path were addressed. Seventeen parkour participants were enrolled and divided into two groups based on their experience. We analysed signals captured from an inertial measurement unit fixed on the back of the pelvis of each participant during three consecutive repetitions of a specifically designed parkour routine under the guidance of video analysis. Two fluency parameters, namely smoothness and hesitation, were measured. Smoothness was calculated as the number of inflexions on the so-called jerk graph; hesitation was the percentage of the drop in the centre of mass velocity. Smoothness resulted in significantly lower values in advanced athletes (mean: 126.4; range: 36-192) than in beginners (mean: 179.37; range: 98-272) during one of the three motor activities (p = 0.02). A qualitative analysis of hesitation showed that beginner athletes tended to experience more prominent velocity drops and negative deflection than more advanced athletes. In conclusion, a system based on a video and an inertial measurement unit is a promising approach for quantification and the assessment of variability of fluency, and it is potentially beneficial to guide and evaluate the training process.
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Running in parkour
Autor
Edwardes, D., & Feletti, F.
2022
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The Running Athlete
Tipo de publicación
Capítulo de libro
Idioma
Inglés
Palabras clave
Sports science. Musculoskeletal system, Injury, Training, Prevention, Physical exercise
Resumen
Parkour is a sport based around overcoming obstacles in one's environment with only the human body's abilities. The activity utilises foundational human locomotion patterns, and running is included in the great majority of parkour movements or between applying unique parkour athletic gestures or motor skills. Moreover, running has specific features in parkour, being widely used on a horizontal surface and oblique or vertical surfaces. Although running was a traditional element within parkour training, younger communities tend to focus more on the aesthetic and explosive movements within parkour and do not typically practice distance running of any sort; running as a skill in itself is practised by only a minority of the parkour community worldwide. There is commonly a non-systematic approach to the training, since most parkour practitioners use programming types known as self-regulating programming and project-based programming. Many benefits from introducing running as a regular practice for parkour participants would support and improve any practitioner's general physical preparation-for example, the increase in speed and power. Running on challenging surfaces, such as ground lines, curbs or rails, may improve movement control and increase the safety margin. Running practice could bring many benefits to injury prevention in parkour by increasing dynamic stability and balance, contralateral coordination and maintaining healthy hip function and range of motion. Trail running may also improve ankle, hip and knee coordination and mobility and postural responsiveness, which directly benefits the variability required in parkour.
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El parkour en la potenciación de la fuerza explosiva en adolescentes
Autor
Pérez-Rocha, A. A. & Cabezas-Flores, M. M.
2022
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Polo del Conocimiento: Revista científico - profesional
Tipo de publicación
Artículo de revista
Idioma
Español
Palabras clave
Parkour; fuerza explosiva; edades escolares
Resumen
Existe una gran problemática dentro de los salones de clases en donde se puede apreciar que las metodologías que se utilizan en las clases de educación física no siempre pueden ser las correctas, ya que se deja de lado el trabajo de fuerza explosiva, lo que evita que los jóvenes puedan tener los beneficios de desarrollar esta capacidad en edades futuras, existe una alternativa propuesta, que es el trabajo de fuerza con la enseñanza del parkour a los jóvenes, esta disciplina aporta varios beneficios a los estudiantes, como lo son un desarrollo de habilidades motrices, capacidades de fuerza, resistencia y crea una base para cualquier deporte que el estudiante practique o vaya a practicar a futuro, mediante una revisión sistemática, tomándose en cuenta criterios metodológicos, se demuestran que las capacidades desarrolladas al practicar parkour y al mejorar su fuerza explosiva indican que los jóvenes pueden ser aptos para cualquier tipo de deporte que requiera el uso de habilidades corporales. Es importante que se tomen en cuenta el desarrollo de estas habilidades en estas edades escolares junto con el trabajo de desarrollo motriz, ya que son etapas formativas en las que los estudiantes pueden alcanzar sus máximas capacidades, lo que conllevará a una vida activa y saludable. Se puede concluir que con el parkour se puede desarrollar significativamente el trabajo de fuerza explosiva, incluso en más cantidad que realizar entrenamiento de gimnasia o de levantamiento de potencia, por lo que es una alternativa válida para trabajar estas capacidades en los jóvenes.
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Parkour – a bridge between motor activities and live-ability practices in the urban jungle
Autor
Mango, P., Castaldo, F.B. & Calefato, A.
2021
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Journal of Physical Education and Sport
Tipo de publicación
Artículo de revista
Idioma
Inglés
Palabras clave
Parkour, urban jungle, movement, environment, Edgework, calculated risk
Resumen
The origin of parkour can be dated back to George Hébert’s studies. It was created in France and quickly spread around the world. This motor discipline is commonly defined as “art du déplacement”, and its aim is to adapt one’s movements to the surrounding environment, both natural and urban. Parkour transforms towns from still and impersonal spaces into places for creativity, learning, and self-knowledge. In fact, a practitioner (before beginning to move) will continuously wonder about his motivations and his physical perceptions, converse with his fears, and look for his psychophysical balance. In 2019, the Italian Ministry of Health invited to consider unstructured activities to promote active life and make individual and collective gratification elements available. With this aim, parkour (as a mainly sensory–motor discipline) is very useful owing to its educational purposes, in particular when children are involved, because their approach to senses is still free from social and family conditioning. Parkour is a movement practice, which requires considerable physical, mental, and emotional training. We discuss the relationship between parkour and edgework (a socio-psychological concept about voluntary risk-taking; Lyng S., 1990) because parkour practitioners are exposed to risks that seem greater than what is socially acceptable. This study analyzes parkour as an outdoor activity, as an expression of flourishing (Nussbaum M, 2007) from the point of view of the urban jungle and as a denunciation of unsuitability of urbanization for the natural needs of the human being. We confirmed that the edgework approach was a very effective tool for practitioners to improve their specific skills and their personal lives. Parkour poses the questions; the practitioner’s aim is to find the answers.
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Effects of Functional Movement Skills on Parkour Speed-Run Performance
Autor
Strafford, B.W. et al.
2021
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Eur J Sport Sci
Tipo de publicación
Artículo de revista
Idioma
Inglés
Palabras clave
Resumen
Parkour speed-runs require performers (known as Traceurs) to negotiate obstacles with divergent properties such as angles, inclinations, sizes, surfaces, and textures in the quickest way possible. The quicker the run, the higher the performer is ranked. Performance in Parkour speed-runs may be regulated through Parkour Traceurs' basic movement skill capacities given the physical requirements of the event. This study examined what functional movement skills correlate with Parkour speed-run performance. Nineteen male Parkour Traceurs undertook a physical testing battery inclusive of: agility T-test, maximal grip strength test, and maximal vertical and horizontal jumps across several jump modalities. For the speed-run, Parkour Traceurs navigated an indoor Parkour installation. Pearson's correlation analyses (r) revealed that agility T-test performance showed a significant negative correlation with Parkour speed-run performance, whereas standing long jump and counter movement jump (with and without arm swing) were significantly positively correlated with Parkour speed-run performance. Concurrent with the intrinsically-linked building blocks in the Athletic Skills Model, the data from the present study suggest that performance in Parkour-speed-runs are underpinned by functional movement skills (jumping, running; arm swinging) and conditions of movement (agility), all of which encapsulate elements of basic motor properties (speed; strength). From a practical perspective, the agility T-test, standing long jump, and counter movement jump without and without arm swing can form a basic battery to evaluate the physical effects of Parkour speed-run interventions on functional movement skills.
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Choreographic techniques for human bodies in weightlessness
Autor
Dipert, R.A.
2021
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Acta Astronautica
Tipo de publicación
Artículo de revista
Idioma
Inglés
Palabras clave
Moment of inertia, Rotation, Human body, Dance, Movement control, Weightlessness
Resumen
Microgravity environments present unique movement and perceptual challenges which are most appropriately explored by movement professional. The high cost of microgravity and space endeavors place utilization of the time in those environments at a premium. We have identified techniques which can be practiced on Earth to increase competence of motion and develop a deeper understanding of reorientation of the human body in microgravity. This research has focused on understanding strategies for planning and executing specific movements, which can be explored in precise and low cost ways. A simulator was coded to explore the dynamics of the human body, which allows for visual and numeric calculations of the body’s moment of inertia eigenvectors and center of mass in a variety of positions. The maneuvers were explored with dance, circus, and parkour artists through the use of parabolic flights, pools, and aerial harnesses.
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Influencia del entrenamiento pliométrico en el desarrollo de la fuerza explosiva en el parkour
Autor
Torres Larrea, A. F. & Romero Frómeta, E.
2021
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Lecturas: Educación física y deportes
Tipo de publicación
Artículo de revista
Idioma
Español
Palabras clave
Entrenamiento, Pliometría, Fuerza explosiva, Parkour
Resumen
El estudio propone valorar las adaptaciones inducidas por un programa de entrenamiento pliométrico y cómo repercute sobre la dirección del entrenamiento denominada como fuerza explosiva en distintos atletas practicantes de Parkour, para lo cual se realizó un estudio muestra con un total de 25 atletas (n=25; edad=28,5±10,5 años; peso=63±11 kg), género masculino. La investigación se llevó a cabo con un grupo que realizo el programa de entrenamiento pliométrico durante ocho semanas (20 sesiones). Se realizaron cuatro test de saltabilidad para la valoración de la fuerza explosiva, para obtener una valoración inicial y final al terminar el programa. Los test que se aplicaron: test de salto de longitud sin carrera de impulso, test de salto de longitud con un paso de carrera de impulso, test de salto de longitud con tres pasos de carrera de impulso, test de saltabilidad vertical, para procesarlos y realizar una valoración del efecto de la fuerza explosiva del tren inferior de los distintos atletas de Parkour. En los atletas se produjo una mejora significativa en la prueba de salto sin carrera de impulso (p=0,000), el salto con un paso (p=0,000) y con tres pasos de carrera de impulso (p=0,000), mientras que en la prueba de saltabilidad vertical el grado de significancia no llegó a los valores que se esperaba (p=0,065). Se concluyó que a grandes rasgos la fuerza explosiva es directamente proporcional a la realización de un entrenamiento pliométrico con una duración de ocho semanas.
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Are Children Attracted to Play Elements with an Open Function?
Autor
Lynn van der Schaaf, A., Caljouw, S.R. & Withagen, R.
2020
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Ecological Psychology
Tipo de publicación
Artículo de revista
Idioma
Inglés
Palabras clave
Resumen
The present study aimed to determine the degree to which play elements have an “open function”, and whether children are attracted to them. The architect van Eyck hypothesized that play elements with an open function attract playing children because such elements do not suggest a certain type of behavior and are, thus, likely to stimulate the children’s creativity. Children of three different age groups (5-6, 7-8, and 11-12years of age) played freely in a Parkour
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Designing Parkour-style training environments for athlete development: insights from experienced Parkour Traceurs
Autor
Strafford, B.W. et al.
2020
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Qualitative Research in Sport, Exercise and Health
Tipo de publicación
Artículo de revista
Idioma
Inglés
Palabras clave
afordances, athletic development, Athletic Skills Model, donor sport, free running
Resumen
Contemporary models of motor learning implicate the value of Parkour-style training as an activity to enrich athletic performance in different sports. We explored Parkour Traceurs’ experiential knowledge on the range of physical, perceptual, psychological and social skills that they perceive to be developed during Parkour practice and performance. We also investigated their recommendations on how to design Parkour practice to facilitate the development of foundational performance behaviours. Experienced male Parkour Traceurs (n = 14) were interviewed using an open-ended, semi-structured approach, with a two-stage thematic analysis being conducted to identify themes. The analysis identified two dimensions: Skills Developed Through Parkour and Recommendations for Designing Parkour Training Environments. Parkour Traceurs outlined numerous physical (locomotor skills; endurance; strength; agility; balance), perceptual (multi-limb coordination; control precision; rate control; response orientation), psychological (problem-solving; stress relief; self-efficacy; risk management) and social (networking; initiative; social perceptiveness; receptiveness to feedback) capacities and skills that could be augmented through Parkour training. Parkour Traceurs explained how indoor Parkour environments should promote creative and exploratory movement behaviours that enable physical conditioning, whilst enhancing decision-making and action functionality. Responses suggest that these aims are often achieved by designing a modular practice landscape where Parkour Traceurs manipulate the spacing, orientation and angles of bars and wall set-ups to facilitate the development of different perceptual, cognitive and physical skills. In conclusion, this study provides insights on how affordances offered by a Parkour environment could be integrated into practice to enhance athlete self-regulation and transfer of functional behaviours to team sport performance.
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Beyond athletic development: The effects of parkour-based versus conventional neuromuscular exercises in pre-adolescent basketball players
Autor
Williams, M. K., Hammond, A., & Moran, J.
2023
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Plos One
Tipo de publicación
Artículo de revista
Idioma
Inglés
Palabras clave
Resumen
The purpose of this study was to compare the effects of a parkour-based warm-up to a conventional neuromuscular training (NMT) warm-up on the athletic capabilities of youth basketball players. This was examined through two arms: In Investigation 1, the aims were to measure the effects of the two warm-ups on physical measures of athletic performance in prepubescent basketball players. Using post-intervention semi-structured interviews, Investigation 2 aimed to gain insights from the players in relation to the perceived benefits of the two warm-ups. Pre-adolescent children were recruited from two youth level basketball teams. Participants from one club were randomly assigned to either a conventional NMT warm-up group or a parkour warm-up group, while a control group was formed of participants from the second club. Participants of both experimental groups were required to complete a 15-minute warm-up once per week before their regular basketball practice across 8-weeks. For both groups, the coach adopted the same pedagogical approach, utilising a guided discovery strategy. Pre-post test measures of overhead squat performance, countermovement jump, and 10-metre sprint speed were recorded in all three groups. Additionally, pre-post measures were recorded for a timed parkour-based obstacle course for the two experimental groups. No significant between-group differences were found between pre- and post-test measures. However, analysis using Cohen's d effect sizes revealed improvements in both intervention groups versus the control. Moreover, between group effect size differences were observed between the two experimental groups. Following the intervention, participants from both experimental groups were also invited to take part in a post-intervention semi-structured interview to discuss their experiences. The thematic analysis of these semi-structured interviews revealed three higher order themes: Enjoyment; Physical literacy; and Docility; of which the two former themes appear to align to constructs relating to the wider concept of physical literacy. In summary, warm-ups designed to improve athleticism can include less structured and more diverse movement skills than are typical of conventional NMT warm-ups. Specifically, we provide evidence that advocates for warm ups that include parkour-related activities alongside conventional NMT exercises to preserve physical fitness qualities and to simultaneously evoke a sense of enjoyment, fun, and purpose. The benefit of such activities may extend beyond athletic development and, more broadly, contribute to the development of physical literacy.
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Training habits and lower limb injury prevention in parkour practitioners
Autor
Grosprêtre, S. & El Khattabi, S.
2022
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Movement and Sports Sciences - Science et Motricite
Tipo de publicación
Artículo de revista
Idioma
Inglés
Palabras clave
Freeruning, knee, ankle, sprain
Resumen
Parkour consists of overcoming obstacles mostly in an urban landscape. Little is known regarding usual training habits and injury risks of traceurs, i.e., parkour practitioners. In this study, a 20-min survey have been fulfilled by a population of traceurs regarding training load, habits (type of warm up, physical conditioning, stretching), type of footwear, and number and type of ankle- and knee-injuries during their career. A total of 180 responses were analyzed (24.4 ± 5.9 years old, 21.7% female, 6.0 ± 3.9 years of experience). Participants reported to train 1 to 7 times per week for a mean duration of 2.2 h. 76% practiced stretching exercises. 75.6% practiced physical conditioning in addition to their parkour training (weightlifting, functional exercises). Injury rate was 1.7 per 1000 h of training, mostly ankle sprains and knee contusions. Number of injury and training load were positively correlated. The lack of physical conditioning was also a factor of injury. Knee injuries have been more frequent on participants wearing minimalist shoes. Although training appears well auto-organized and the injury rate quite low some pitfalls require attention, notably in training planning, warm-up, stretching and conditioning. Building training and coaching methods specific to parkour appears essential.
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Feasibility of Parkour-style training in team sport practice: A Delphi study
Autor
Strafford, B. W. et al.
2022
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Journal of Sports Sciences
Tipo de publicación
Artículo de revista
Idioma
Inglés
Palabras clave
Coaching; learning; parkour training; pedagogy; talent development
Resumen
Research has suggested Parkour-style training could act as a donor sport for athlete development in team sports. This study aimed to interrogate expert consensus on the feasibility of integrating Parkour-style training into team sport practice, by employing a three-round, online Delphi method. Talent development and strength and conditioning coaches working in team sport settings were invited to participate. Twenty-four coaches completed Round One, 21 completed Round Two and 20 completed Round Three. In Round One, coaches answered 15 open-ended questions across four categories: (1) General Perceptions of Parkour-style training; (2) Potential Applications of Parkour-style training; (3) Designing and Implementing Parkour-style training Environments; and (4), Creating an Inclusive Learning Environment. Responses from Round One were analysed using reflexive thematic analysis with deductive and inductive coding resulting in 78 statements across three dimensions (Application of Parkour Style Training in Team Sports; Designing and Implementing Parkour-style training Environments; Overcoming Potential Barriers when Integrating Parkour-style training). In Rounds Two and Three, coaches rated these statements using a four-point Likert scale and measures of collective agreement or disagreement were calculated. This study established consensus around a set of design principles for integrating Parkour-style training into team sport practice routines.
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The degree to which traditional play equipment, Parkour play elements, and Aldo van Eyck’s play sculptures have an open function
Autor
Van Der Schaaf, A.L. et al
2021
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European Early Childhood Education Research Journal
Tipo de publicación
Artículo de revista
Idioma
Inglés
Palabras clave
Affordances, open functions, Parkour play elements, traditional play equipment, van Eyck’s play sculptures
Resumen
The concept of open functions was introduced to capture an intended feature of van Eyck’s seminal play sculptures – they do not suggest a specific action. In a recent study, Van der Schaaf, A. L., S. R. Caljouw, and R. Withagen. (2020. “Are Children Attracted to Play Elements with an Open Function?” Ecological Psychology 32: 79–94) aimed to determine the degree of openness of Parkour play elements by asking participants what behavior children will mainly perform on them. In the present study, we used this method to determine the degree of openness of traditional play elements (e.g. a slide), van Eyck’s play sculptures, and Parkour play elements. In addition, we measured the time participants needed to answer the question of what action children will mainly perform on the different elements. We found that generally the Parkour elements have the highest degree of openness. Interestingly, van Eyck’s play elements appeared not to be that open. Moreover, the reaction time proved to be an alternative measure for the degree of openness.
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Effect of transcranial direct current stimulation on the psychomotor, cognitive, and motor performances of power athletes
Autor
Grosprêtre, S. et al.
2021
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Sci Rep
Tipo de publicación
Artículo de revista
Idioma
Inglés
Palabras clave
Resumen
In sports science, transcranial direct current stimulation (tDCS) has many unknown effects on neuromuscular, psychomotor and cognitive aspects. Particularly, its impact on power performances remains poorly investigated. Eighteen healthy young males, all trained in a jumping sport (parkour) performed three experimental sessions: anodal tDCS applied either on the left dorsolateral prefrontal cortex (dlPFC, cathode in supraorbital area) or on the primary motor cortex (M1, cathode on contralateral shoulder), and a placebo condition (SHAM), each applied for 20 min at 2 mA. Pre and post, maximal vertical and horizontal jumps were performed, associated to leg neuromuscular assessment through electromyography and peripheral nerve stimulations. Actual and imagined pointing tasks were also performed to evaluate fine motor skills, and a full battery of cognitive and psychomotor tests was administered. M1 tDCS improved jump performance accompanied by an increase in supraspinal and spinal excitabilities. dlPFC stimulation only impacted the pointing tasks. No effect on cognitive tests was found for any of the tDCS conditions. To conclude, the type of performance (maximal versus accurate) affected depended upon the tDCS montage. Finally, athletes responded well to tDCS for motor performance while results to cognitive tests seemed unaffected, at least when implemented with the present rationale.
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“I am going out!” – lifestyle sports and physical activity in adolescents
Autor
Janeckova, K. et al.
2021
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BMC Public Health
Tipo de publicación
Artículo de revista
Idioma
Inglés
Palabras clave
Self-organized activities, Unstructured leisure, Sedentary behaviour, Youth, Inactivity, Lifestyle
Resumen
Lifestyle sport activities (e.g. parkour or skateboarding) are considered attractive and beneficial for a long-term commitment to physical activity (PA) and might be a great opportunity for adolescents who do not feel comfortable in an organized or competitive atmosphere. The purpose of the study was to assess whether participation in lifestyle activities is associated with moderate-to-vigorous physical activity (MVPA), out-of-school vigorous physical activity (VPA), and sedentary behaviour in adolescents aged 10–15 years, with major demographic variables (sex, age, socioeconomic status) being taken into account.
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Parkour-Based Activities in the Athletic Development of Youth Basketball Players
Autor
Williams, M.D. et al.
2021
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Front Physiol
Tipo de publicación
Artículo de revista
Idioma
Inglés
Palabras clave
affordance landscape; fundamental movement skills; non-linear pedagogy; strength training; youth athletes.
Resumen
While ideas from long-term athlete development (LTAD) models have been adopted and integrated across different sports, issues related to early specialization, such as increased risk of injury and burnout, are still common. Although some benefits may be associated with early sport specialization, sports sampling is purported to be a more effective approach to the long-term health and wellbeing of children. Furthermore, the concept of developing what are commonly referred to as "fundamental movement skills" (FMS) is central to the rationale for delaying single sports specialization. However, in place of sports sampling, it appears that the practice of strength and conditioning (S&C) has become a driving force behind developmental models for youth athletes, highlighted by the growing body of literature regarding youth athletic development training. In this perspective piece, we explore how conventional S&C practice may insufficiently develop FMS because typically, it only emphasizes a narrow range of foundational exercises that serve a limited role toward the development of action capabilities in youth athletic populations. We further discuss how this approach may limit the transferability of physical qualities, such as muscular strength, to sports-specific tasks. Through an ecological dynamics lens, and using basketball as an example, we explore the potential for parkour-based activity within the LTAD of youth basketball players. We propose parkour as a training modality to not only encourage movement diversity and adaptability, but also as part of an advanced strength training strategy for the transfer of conventional S&C training.
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Understanding children’s preference for park features that encourage physical activity: an adaptive choice based conjoint analysis
Autor
Veitch, J. et al.
2021
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International Journal of Behavioral Nutrition and Physical Activity
Tipo de publicación
Artículo de revista
Idioma
Inglés
Palabras clave
Resumen
Parks are a key setting for physical activity for children. However, little is known about which park features children prefer and which features are most likely to encourage them to be active in parks. This study examined the relative importance of park features among children for influencing their choice of park for engaging in park-based physical activity.
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Kinematic Analyses of Parkour Landings from as High as 2.7 Meters
Autor
Dai, B. et al.
2020
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Journal of Human Kinetics
Tipo de publicación
Artículo de revista
Idioma
Inglés
Palabras clave
jump-landing, impact, injury, performance, lower extremities
Resumen
Developing effective landing strategies has implications for both injury prevention and performance training. The purpose was to quantify the kinematics of Parkour practitioners' landings from three heights utilizing four techniques. Seventeen male and three female Parkour practitioners landed from 0.9, 1.8, and 2.7 m utilizing the squat, forward, roll, and stiff landing techniques when three-dimensional kinematics were collected. The stiff landing demonstrated the shortest landing time, and the roll landing showed the longest landing time for 1.8 and 2.7 m. Roll landings demonstrated the greatest forward velocities at initial contact and at the end of the landing. Stiff landings showed the greatest changes in vertical velocity during the early landing, while roll landings showed the least changes for 0.9 and 1.8 m. Both roll and stiff landings generally resulted in decreased changes in horizontal velocity during the early landing compared to squat and forward landings. The four landing techniques also demonstrated different lower extremity joint angles. Stiff landings may increase injury risk because of the quick decrease of vertical velocities. Roll landings allow individuals to decrease vertical and horizontal velocities over a longer time, which is likely to decrease the peak loading imposed on the lower extremities.
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Luxation sous talienne interne pure ouverte: à propos d´un cas
Autor
Mmai, O.
2020
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PAMJ Clinical Medicine
Tipo de publicación
Artículo de revista
Idioma
Francés
Palabras clave
Luxation, sous talienne interne, accident de sport
Resumen
La luxation sous talienne est une lésion traumatique rare du pied dans laquelle le calcanéum et l'os naviculaire sont déplacés par rapport au talus qui conserve sa position normale au sein de la mortaise de la cheville. Elle doit être considérer comme une urgence thérapeutique, et aucun traitement n´est spécifique à cette lésion Les auteurs rapportent un cas de luxation sous talienne interne pure ouverte stade 2 de Gustillo et Anderson suite à un accident de sport: Parkour. Le patient a bénéficié d´une réduction urgente suivie d´une stabilisation avec arthroryse par deux broches calcanéo-astragaliennes et deux broches talo-naviculaires, et d´une immobilisation pendant six semaines. Après un recul de 12 mois, les résultats fonctionnels étaient satisfaisants.
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