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1.
PeerJ ; 12: e17271, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38680883

RESUMEN

Background: We sought to create a system to evaluate the physical fitness of outstanding Chinese male boxers that included an evaluation index, fitness level criteria, and modeling. This system was then used to assess athletes' physical fitness and development. Methods: Documentation, expert interviews, questionnaires, measurements, and statistical analyses were used in this study. Results: The physical fitness evaluation system included the following three components: (1) body shape indexes (n = 4) including the backhand upper arm circumference differential, finger span height, Cottrell index, and pelvic width/shoulder width × 100; (2) body function indexes (n = 4) including relative maximum anaerobic power, relative maximal oxygen uptake, and creatine kinase and testosterone concentrations; and (3) athletic quality indexes (n = 9) including the speed strength index, the backhand straight punch strength, 3-min cumulative punching force, backhand straight punch reaction time, backhand straight punch speed, 30-m sprint, 9-min double shake jump rope, 1-min double shake jump rope, and sitting forward bend tests. A five-point grading system to evaluate physical fitness was established and an evaluation model was proposed. Conclusions: The reference values were determined to be objective and effective using a back substitution process. Individual and differential assessments reflected the athletes' level of physical fitness. The critical values were established under the best and worst conditions and the optimal values were found to be valid and effective.


Asunto(s)
Boxeo , Aptitud Física , Humanos , Masculino , Aptitud Física/fisiología , Boxeo/fisiología , China , Rendimiento Atlético/fisiología , Adulto Joven , Adulto , Testosterona/sangre , Prueba de Esfuerzo/métodos , Valores de Referencia , Atletas , Creatina Quinasa/sangre , Consumo de Oxígeno/fisiología , Pueblos del Este de Asia
2.
PLoS One ; 19(4): e0301728, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38603715

RESUMEN

AR technology allows users to interact with virtual objects in real-world settings. Immersive AR experiences can enhance creativity and possibilities. Learners can explore real-life situations in a safe, controlled environment, understand abstract concepts and solve problems. This study investigates whether AR-codes affect boxing beginners' performance in some fundamental defensive techniques. An experimental and control group were created to implement a quasi-experimental design. By using the ASSURE instructional design model, AR technology was incorporated into the educational program and delivered in flipped classroom method to the experimental group. Comparatively, the control group is taught a program using a teacher's command style. A post-measurement of defensive boxing skills was conducted for both groups. Participants were 60 boxing beginners aged 12 to 14 who had enrolled in Port Fouad Sports Club's 2023/2024 training season in Port Said, Egypt. Randomly, participants were divided into control and experimental groups. They were homogenized and equivalent in terms of age, height, weight, IQ, physical fitness, and skill level. According to the study results, the experimental group performed better in post-measurements than the control group. The AR Codes technology had a large effect size on the learning of boxing defensive skills under study. Consequently, it is necessary to use AR Codes technology as an educational resource to enhance the learning process, integrate it with active learning strategies, and use it to teach defensive boxing skills and apply them to offensive and counterattack skills, thereby improving the learning process.


Asunto(s)
Realidad Aumentada , Boxeo , Humanos , Aprendizaje Basado en Problemas/métodos , Evaluación Educacional/métodos , Escolaridad
3.
Sci Rep ; 14(1): 7640, 2024 04 01.
Artículo en Inglés | MEDLINE | ID: mdl-38561402

RESUMEN

The purpose of this study is to deeply understand the psychological state of boxers before the competition, and explore an efficient boxing action classification and recognition model supported by artificial intelligence (AI) technology through these psychological characteristics. Firstly, this study systematically measures the key psychological dimensions of boxers, such as anxiety level, self-confidence, team identity, and opponent attitude, through psychological scale survey to obtain detailed psychological data. Then, based on these data, this study innovatively constructs a boxing action classification and recognition model based on BERT fusion 3D-ResNet, which not only comprehensively considers psychological information, but also carefully considers action characteristics to improve the classification accuracy of boxing actions. The performance evaluation shows that the model proposed in this study is significantly superior to the traditional model in terms of loss value, accuracy and F1 value, and the accuracy reaches 96.86%. Therefore, through the comprehensive application of psychology and deep learning, this study successfully constructs a boxing action classification and recognition model that can fully understand the psychological state of boxers, which provides strong support for the psychological training and action classification of boxers.


Asunto(s)
Boxeo , Inteligencia Artificial , Psicología del Deporte , Redes Neurales de la Computación
4.
PLoS One ; 19(4): e0301229, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38578778

RESUMEN

The popularity of martial arts in the present times has become apparent, therefore, it is necessary to explore martial artists' preferences and the schools' competitiveness. The purpose of this study was to assess martial artists' preferences concerning the services offered by martial arts schools. Conjoint analysis was utilized to analyze the responses of fifty-five (55) martial artists based on the seven (7) martial arts schools' attributes. The results showed that the type of martial arts was found to be the most important attribute (30.449%) followed by distance (27.970%), price range (22.706%), social environment (11.097%), class preference (5.080%), goal (1.562%), and schedule (1.135%). Furthermore, Muay Thai or Kickboxing was the most preferred martial art, Mixed Martial Arts (MMA) was the second priority, next was Taekwondo, then Karate, and finally Boxing. In addition, the martial artists' preferred distance was less than 8 km, and a monthly training cost of 150,000 to 450,000 IDR (10 to 20 USD). Martial artists liked attending open classes, treated martial arts as a hobby, and favored attending classes once or twice weekly. With the lack of conjoint-related studies in the martial arts industry, the findings contributed to academicians and addressed issues of inadequate studies. Most importantly, the researchers presented managerial implications to leverage marketing techniques and develop the business operations of martial arts schools.


Asunto(s)
Boxeo , Artes Marciales , Indonesia , Artes Marciales/fisiología , Instituciones Académicas , Comercio
5.
J Strength Cond Res ; 38(5): 948-950, 2024 May 01.
Artículo en Inglés | MEDLINE | ID: mdl-38662886

RESUMEN

ABSTRACT: Peveler, WW, Schoffstall, J, Coots, J, Kilian, J, and Glauser, J. The effects of boxing glove design on thumb position when making a fist for striking. J Strength Cond Res 38(5): 948-950, 2024-It has been suggested that boxing glove design alters thumb position increasing the risk of injury. The purpose of this study was to determine the effects of boxing glove design on thumb joint angles when making a fist. Ten experienced fighters participated in this study. A DEXA scan was used to produce an x-ray image of thumb position for all conditions (no gloves and 10-oz boxing gloves). Mean values for dependent measures were compared using a paired-sample T test and an alpha of 0.05. The carpometacarpal (CMC) joint angle was significantly different between no glove (14.1 ± 6.54°) and boxing glove (34.2 ± 7.60°) at p ≤ 0.001. The metacarpophalangeal (MP) joint angle was significantly different between no glove (132.6 ± 12.74°) and boxing glove (149.40 ± 8.15°) at p ≤ 0.001. The IP joint angle was not significantly different between no glove (135.50 ± 19.12°) and boxing glove (144.40 ± 17.39°) at p = 0.269. The perpendicular distance from the second metacarpal of the hand to the center of the MP joint was significantly different between no glove (0.48 ± 0.54 cm) and boxing glove (1.84 ± 0.29 cm) at p ≤ 0.001. Use of a boxing glove resulted in abduction of the thumb away from the hand and increased CMC and MP joint angles that were significantly different in relation to making a fist without a glove. Information from this study may provide insight into the high rate of thumb injury and provide insight for future boxing glove design.


Asunto(s)
Diseño de Equipo , Pulgar , Humanos , Pulgar/fisiología , Adulto , Masculino , Boxeo/fisiología , Articulación Metacarpofalángica/fisiología , Articulaciones Carpometacarpianas , Adulto Joven , Guantes Protectores
6.
Nutrients ; 16(3)2024 Feb 05.
Artículo en Inglés | MEDLINE | ID: mdl-38337738

RESUMEN

Athletes often take sport supplements to reduce fatigue and immune disturbances during or after training. This study evaluated the acute effects of concurrent ingestion of alkaline water and L-glutamine on the salivary immunity and hormone responses of boxers after training. Twelve male boxing athletes were recruited in this study. During regular training, the participants were randomly divided into three groups and asked to consume 400 mL of alkaline water (Group A), 0.15 g/kg body weight of L-glutamine with 400 mL of water (Group G), and 0.15 g/kg of L-glutamine with 400 mL of alkaline water (Group A+G) at the same time each day for three consecutive weeks. Before and immediately after the training, saliva, heart rates, and the rate of perceived exertion were investigated. The activity of α-amylase and concentrations of lactoferrin, immunoglobulin A (IgA), testosterone, and cortisol in saliva were measured. The results showed that the ratio of α-amylase activity/total protein (TP) significantly increased after training in Group A+G but not in Group A or G, whereas the ratios of lactoferrin/TP and IgA/TP were unaffected in all three groups. The concentrations of salivary testosterone after training increased significantly in Group A+G but not in Group A or G, whereas the salivary cortisol concentrations were unaltered in all groups. In conclusion, concurrent ingestion of 400 mL of alkaline water and 0.15 g/kg of L-glutamine before training enhanced the salivary α-amylase activity and testosterone concentration of boxers, which would be beneficial for post-exercise recovery.


Asunto(s)
Boxeo , alfa-Amilasas Salivales , Humanos , Masculino , Glutamina/metabolismo , Testosterona/metabolismo , Hidrocortisona/metabolismo , Lactoferrina/metabolismo , Inmunoglobulina A/metabolismo , Atletas , Ingestión de Alimentos , Saliva/metabolismo
7.
PM R ; 16(1): 36-46, 2024 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-37071916

RESUMEN

BACKGROUND: Boxing training has become a popular form of exercise for people with Parkinson disease (PD). There is a dearth of high-quality feasibility, safety, and efficacy data on boxing training for PD. Feasibility of Instituting Graduated High-intensity Training (FIGHT-PD) aimed to examine these features in a periodized boxing training program featuring high-intensity physical and cognitive demands. OBJECTIVE: To conduct a feasibility study, aiming to address deficiencies in the current knowledge base and to provide data for future studies. DESIGN: Single-arm, open-label feasibility. SETTING: University department and medical research institute. PARTICIPANTS: Ten people with early stage PD without contraindications to intense exercise, identified from a database of participants interested in boxing training. INTERVENTIONS: A 15-week exercise program with three 1-hour sessions per week, with each session including warmup and then rounds of noncontact boxing using a training device. Three distinct blocks of 5 weeks including active rest. Boxers Development: focus on training technique Boxers Cardio: increasing intensity, including high-intensity interval training Boxers Brain: focus on cognitively challenging dual task training MAIN OUTCOME MEASURES: Process, resource, and management measures including recruitment and retention rates, timelines and costs, and compliance with prescribed exercise targets. Clinical outcomes were safety (adverse events), training intensity (using heart rate and perceived exertion monitoring), tolerability (pain, fatigue, and sleep scores), and pre- and postprogram Unified Parkinson Disease Rating Scale (UPDRS-III). RESULTS: Among 10 participants from a pool of 82 (recruitment rate = 12%), there were no withdrawals; 348/360 workouts were completed (adherence = 97.7%); 4/348 (1.1%) workouts were missed due to minor injury. Nine of 10 participants showed improvement in UPDRS motor score. CONCLUSIONS: FIGHT-PD provides a depth of feasibility and safety data, methodological detail, and preliminary results that is not described elsewhere and could provide a useful basis for future studies of boxing training for PD.


Asunto(s)
Boxeo , Enfermedad de Parkinson , Humanos , Ejercicio Físico , Terapia por Ejercicio/métodos , Estudios de Factibilidad , Enfermedad de Parkinson/terapia
8.
Eur J Appl Physiol ; 124(3): 993-1003, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-37768343

RESUMEN

PURPOSE: The purpose of this study was to investigate the acute effect of head impacts, sustained over the course of three rounds of amateur boxing, on indices of cerebrovascular function. METHODS: Eighteen university amateur boxers (six female) completed three experimental trials in a randomised order; (1) three rounds of boxing (BOX), (2) an equivalent bout of pad boxing (where no blows to the head were sustained; PAD), and (3) a time-matched seated control trial (CON). Indices of cerebrovascular function were determined immediately before and 45 min after each trial. Specifically, dynamic cerebral autoregulation (dCA) was determined by considering the relationship between changes in cerebral blood velocity and mean arterial pressure during 5 min of squat-stand manoeuvres at 0.05 and 0.10 Hz. Cerebrovascular reactivity was determined using serial breath holding and hyperventilation attempts. RESULTS: Participants received an average of 40 ± 16 punches to the head during the BOX trial. Diastolic, mean and systolic dCA phase during squat stand manoeuvres at 0.05 Hz was lower after BOX compared to pre BOX (P ≤ 0.02, effect size (d) ≥ 0.74). No other alterations in dCA outcomes were observed at 0.05 or 0.10 Hz. The number of head impacts received during the BOX trial was associated with the change in systolic phase (r = 0.50, P = 0.03). No differences in cerebrovascular reactivity to breath holding or hyperventilation were observed. CONCLUSIONS: A typical bout of amateur boxing (i.e., three rounds) can subtly alter cerebral pressure-flow dynamics, and the magnitude of this change may be related to head impact exposure.


Asunto(s)
Boxeo , Dióxido de Carbono , Humanos , Femenino , Hiperventilación , Homeostasis/fisiología , Presión Arterial , Circulación Cerebrovascular
9.
Ann Biomed Eng ; 52(2): 270-281, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-37728812

RESUMEN

Wearable sensors are used to quantify head impacts in athletes, but recent work has shown that the number of events recorded may not be accurate. This study aimed to compare the number of head acceleration events recorded by three wearable sensors during boxing and assess how impact type and location affect the triggering of acceleration events. Seven boxers were equipped with an instrumented mouthguard, a skin patch, and a headgear patch. Contacts to participants' heads were identified via three video cameras over 115 sparring rounds. The resulting 5168 video-identified events were used as reference to quantify the sensitivity, specificity, and positive predictive value (PPV) of the sensors. The mouthguard, skin patch, and headgear patch recorded 695, 1579, and 1690 events, respectively, yielding sensitivities of 35%, 86%, and 78%, respectively, and specificities of 90%, 76%, and 75%, respectively. The mouthguard, skin patch, and headgear patch yielded 693, 1571, and 1681 true-positive events, respectively, leading to PPVs for head impacts over 96%. All three sensors were more likely to be triggered by punches landing near the sensor and cleanly on the head, although the mouthguard's sensitivity to impact location varied less than the patches. While the use of head impact sensors for assessing injury risks remains uncertain, this study provides valuable insights into the capabilities and limitations of these sensors in capturing video-verified head impact events.


Asunto(s)
Boxeo , Conmoción Encefálica , Protectores Bucales , Dispositivos Electrónicos Vestibles , Humanos , Boxeo/lesiones , Aceleración , Cabeza , Dispositivos de Protección de la Cabeza , Fenómenos Biomecánicos
10.
Eur J Appl Physiol ; 124(2): 595-606, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-37656280

RESUMEN

PURPOSE: The physiological examination of boxing has been limited to systemic response in amateur athletes. The demands of professional boxing have been overlooked, despite the different competition format. We sought to determine the physiological demands placed on skeletal muscle in professional boxing. METHODS: Ten male professional boxers (age 26 ± 5 years, height 177 ± 4 cm, weight 71 ± 6 kg) were recruited for this observational study. On different days, the athletes completed 6 × 3 min rounds of pad, bag or spar-based training with 1 min recovery between each round. Prior to each session, participants put on a heart rate monitor and near-infrared spectroscopy attached to the belly of the rectus femoris muscle to record heart rate and muscle oxygenation. RESULTS: There were significantly less punches thrown in sparring compared to other training modalities (p < 0.001). Skeletal muscle oxygenation across training modalities consisted of a delay, fast desaturation and steady state. Across rounds there was a significant increase in time delay for desaturation (p = 0.016), rate of fast desaturation (p < 0.001) and duration of fast desaturation (p = 0.019). There was a significant difference in sparring for the heart rate where skeletal muscle oxygenation changes occurred compared to pads or bag sessions (p < 0.001). CONCLUSION: The findings highlight differences in the skeletal muscle response to the different training modalities. Practitioners need to be aware of the muscular demands of each session to allow optimal adaptation across a training camp. Training needs to allow the skeletal muscle to achieve a new oxygenation steady state rapidly to promote efficient performance across rounds.


Asunto(s)
Boxeo , Humanos , Masculino , Adulto Joven , Adulto , Boxeo/fisiología , Espectroscopía Infrarroja Corta , Fenómenos Fisiológicos Respiratorios , Músculo Esquelético , Músculo Cuádriceps
11.
Ophthalmic Plast Reconstr Surg ; 40(1): 75-87, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-37656909

RESUMEN

PURPOSE: To evaluate and compare eye and face trauma in mixed martial arts (MMA) and boxing. DESIGN: Retrospective cohort study. METHODS: Data from boxing and MMA competitions were extracted from the Nevada Athletic Commission (NAC) between 2000 and 2020. Details of competitions, contestants, outcomes, and injuries were extracted. RESULTS: In total 1539 boxing injuries (from 4313 contests) and 1442 MMA injuries (from 2704 contests) were identified. Boxing had higher eye injury rates compared to MMA ( p < 0.0001), with an odds ratio of 1.268 (95% CI, 1.114-1.444). Eye trauma represented 47.63% of boxing injuries and 25.59% of MMA injuries, with periocular lacerations being the most common eye injury in both. Orbital fractures represented 17.62% of eye injuries in MMA and 3.14% in boxing contests. However, 2%-3% were retinal in both sports, and 3.27% were glaucomatous in boxing. MMA contestants had an odds ratio of 1.823 (95% CI, 1.408-2.359) for requiring physician evaluation following an eye injury compared with boxing. MMA contestants also had a higher rate of face ( p < 0.0001) and body ( p < 0.0001) injuries. For both sports, an increased number of rounds and being the losing fighter were associated with increased odds of eye and face injury. CONCLUSION: Although boxing has a higher rate of eye injuries, MMA eye injuries are more likely to require physician evaluation. MMA contestants also have a higher rate of orbital fractures and face and body trauma. A detailed postfight examination and long-term follow-up of ocular injury in combat sports will be vital in proposing reforms to prevent eye trauma.


Asunto(s)
Boxeo , Lesiones Oculares , Traumatismos Faciales , Artes Marciales , Fracturas Orbitales , Humanos , Boxeo/lesiones , Estudios Retrospectivos , Artes Marciales/lesiones , Lesiones Oculares/diagnóstico , Lesiones Oculares/epidemiología , Lesiones Oculares/etiología , Traumatismos Faciales/epidemiología , Traumatismos Faciales/etiología
12.
Mil Med ; 188(Suppl 6): 584-589, 2023 11 08.
Artículo en Inglés | MEDLINE | ID: mdl-37948285

RESUMEN

INTRODUCTION: Use of wearable impact sensor devices to quantitatively measure head impact exposure remains largely unstudied in military-style martial arts training and combat sports, particularly at the beginner levels. The baseline frequency and severity of head impact exposure during introductory military-style martial arts trainings, such as combatives training, is valuable information for developing future programs of instruction and exposure monitoring programs. The purpose of this study was to describe head impact exposures experienced during introductory combatives training (a boxing course) at U.S. Military Academy. METHODS: This study used instrumented mouthguards to measure head impact exposure in U.S. Military Academy cadets during a compulsory boxing course. Summary exposures from a preliminary dataset are presented. RESULTS: Twenty-two male subjects (19.9 ± 1.1 years, 86.6 ± 11.7 kg) participated in 205 analyzed player-bouts (full contact sparring sessions) with 809 video verified impacts (average 3.9 impacts per player-bout). The mean peak linear acceleration was 16.5 ±7.1 G, with a maximum of 70.8 G. There was a right-skewed distribution, with 640/809 (79.1%) events falling between 10 and 20 G. The mean peak angular acceleration was 1.52 ± 0.96 krad/s2, with a maximum of 8.85 krad/s2. CONCLUSIONS: Compared to other high-risk sports at Service Academies, head impacts from beginner boxing were of similar magnitude to those reported for Service Academy football and slightly lower than those reported for Service Academy rugby. Based on these preliminary data, the risk profile for introductory military-style martial arts training, such as boxing or combatives, may be similar to other contact sports like football and rugby, but further research is required to confirm these findings and understand the effects of the exposures in a shorter duration.


Asunto(s)
Boxeo , Conmoción Encefálica , Personal Militar , Humanos , Masculino , Aceleración , Fenómenos Biomecánicos , Dispositivos de Protección de la Cabeza , Adulto Joven
13.
Medicine (Baltimore) ; 102(44): e35810, 2023 Nov 03.
Artículo en Inglés | MEDLINE | ID: mdl-37933059

RESUMEN

The aim of the present study is to conduct a trauma and disability survey in amateur boxers and show the actual conditions of injuries based on the current situations. We have obtained 663 valid responses from male and female boxers. In the questionnaire survey who was carried out on a Web questionnaire form. The questions involve that Face Sheet (gender, height, weight, athletic experience, etc.) and prepared 10 questions about trauma and impairment, 7 questions with concussion or damage on head. and, set 11 self-evaluations, which the boxers assessed their boxing skills. The subjects include amateur boxers who are all high school students (15 years old) and retired boxers. We had analyzed relation between the skills and the injuries. And, main outcome was that make a measure to setting whether or not questionnaires have been knockout (KO) as a variable, we applied a method of multiple logistic regression analysis. Moreover, as for the group who got KO in the past, we have also applied multiple regression analysis by using stepwise regression to factors affecting numbers of symptoms. The number of hits they experienced was smaller in international tournament matches, and the odds rate for KO was 0.669. And, KO experience group was compared with non-KO experience group, and the factors influencing the number of severity symptoms were examined. As a result, 2 factors were selected what "Seriousness in practice" and "Fighting spirit in games". It might be possible that the relation between the experience of being KO and self-assessment of boxing performance.


Asunto(s)
Boxeo , Conmoción Encefálica , Traumatismos Craneocerebrales , Humanos , Masculino , Femenino , Adolescente , Pueblos del Este de Asia , Análisis de Regresión , Encuestas y Cuestionarios , Boxeo/lesiones
14.
Clin J Sport Med ; 33(6): 658-674, 2023 11 01.
Artículo en Inglés | MEDLINE | ID: mdl-37862081

RESUMEN

OBJECTIVES: Although physical trauma has been reported in boxing since its inception, boxing still appeals to athletes and spectators. This systematic review and meta-analysis assess both acute and chronic neurological and neuropsychological effects that boxing has on the brain. Further assessments in terms of comparisons of the concussion ratio in boxing to other combat sports, as well as the efficiency of wearing headguards, are also performed. DATA SOURCES: This systematic review and meta-analysis used the Preferred Reporting Items for Systematic reviews and Meta-Analyses guidelines. The outcomes incorporated included physical chronic abnormalities of the brain, neuropsychiatric, and neurological disorders sustained in amateur or professional boxing, in addition to the safety benefits of boxing headguards. Odds ratios, descriptive statistics, and inferential statistics are also reported. MAIN RESULTS: From the 84 articles reviewed, the 35 included articles suggested that boxers have a significantly elevated risk of sustaining a concussion compared with other combat sports (risk ratio [RR]: 0.253 vs RR: 0.065, P < 0.001). From the 631 amateur and professional boxers analyzed, 147 (23.30%) had cavum septum pellucidum, whereas 125 of 411 amateur and professional boxers (30.41%) presented with some form of brain atrophy. Dementia or amnesia was observed in 46 of 71 boxers (61.79%), 36 of 70 (51.43%) had various forms and severities of cognitive disorders, and 57 of 109 (52.29%) displayed abnormal computed tomography or electroencephalogram scan results. Utilization of headguards significantly increased the risk for stoppages in amateur bouts, compared with boxers not wearing a headguard (OR: 1.75 vs 0.53, P < 0.050). CONCLUSIONS: Boxing is a hazardous sport that has the potential to have fatal and negative life-changing results. Because of the limited reliable data regarding the efficiency of boxing headguards, future research should focus on the overall significance that headguards may have for reducing head trauma.


Asunto(s)
Boxeo , Conmoción Encefálica , Traumatismos Craneocerebrales , Deportes , Humanos , Boxeo/lesiones , Conmoción Encefálica/diagnóstico , Encéfalo
15.
Sensors (Basel) ; 23(16)2023 Aug 10.
Artículo en Inglés | MEDLINE | ID: mdl-37631606

RESUMEN

BACKGROUND: Head impacts in sports can produce brain injuries. The accurate quantification of head kinematics through instrumented mouthguards (iMG) can help identify underlying brain motion during injurious impacts. The aim of the current study is to assess the validity of an iMG across a large range of linear and rotational accelerations to allow for on-field head impact monitoring. METHODS: Drop tests of an instrumented helmeted anthropometric testing device (ATD) were performed across a range of impact magnitudes and locations, with iMG measures collected concurrently. ATD and iMG kinematics were also fed forward to high-fidelity brain models to predict maximal principal strain. RESULTS: The impacts produced a wide range of head kinematics (16-171 g, 1330-10,164 rad/s2 and 11.3-41.5 rad/s) and durations (6-18 ms), representing impacts in rugby and boxing. Comparison of the peak values across ATD and iMG indicated high levels of agreement, with a total concordance correlation coefficient of 0.97 for peak impact kinematics and 0.97 for predicted brain strain. We also found good agreement between iMG and ATD measured time-series kinematic data, with the highest normalized root mean squared error for rotational velocity (5.47 ± 2.61%) and the lowest for rotational acceleration (1.24 ± 0.86%). Our results confirm that the iMG can reliably measure laboratory-based head kinematics under a large range of accelerations and is suitable for future on-field validity assessments.


Asunto(s)
Boxeo , Deportes , Fenómenos Biomecánicos , Aceleración , Movimiento (Física)
16.
Sr Care Pharm ; 38(9): 350-351, 2023 09 01.
Artículo en Inglés | MEDLINE | ID: mdl-37612849

Asunto(s)
Vacunación , Anciano , Humanos , Boxeo
17.
N Z Med J ; 136(1579): 113-118, 2023 Jul 21.
Artículo en Inglés | MEDLINE | ID: mdl-37501250

RESUMEN

Boxing and other combat sports receive constant exposure and support in the media. Corporate boxing matches are a popular method of raising money for charity. However, charity fights are more dangerous for the contestants than other sanctioned bouts. In a world where head trauma and concussion in sports is under constant scrutiny, the ethics of raising funds by deliberate concussive forces to the head needs to be reassessed.


Asunto(s)
Traumatismos en Atletas , Boxeo , Conmoción Encefálica , Humanos , Organizaciones de Beneficencia , Nueva Zelanda , Conmoción Encefálica/prevención & control
18.
Rev. int. med. cienc. act. fis. deporte ; 23(91): 170-182, jul. 2023. tab, ilus
Artículo en Inglés | IBECS | ID: ibc-226924

RESUMEN

Boxing and other combat sports are associated with repetitive head trauma related to damage to the central nervous system. This work aimed to model the effect of a punch to the forehead given by a heavyweight boxer. Methodology: the Finite Element Method (FEM) was used. The research was based on simulating the effects of a dynamic impact and thus predicting, locating, and quantifying changes in the brain due to the blow. This simulation was validated by comparing medical research on brain injuries caused by impacts to the head. Results: The mathematical predictions showed significant brain effects: figures that exceed 100% risk. The MEF appears to be a practical, universal, inexpensive, and quick calculation tool, with important applications to detect evidence of brain trauma. (AU)


El boxeo y otros deportes de combate están asociados a traumas repetitivos en la cabeza, que pueden relacionarse con daños en el sistema nervioso central. El objetivo de este trabajo fue modelar el efecto de un golpe de puño en la frente, dado por un boxeador de peso pesado. Metodología: se utilizó el Método de Elementos Finitos (MEF). La investigación se basó en simular los efectos de un impacto dinámico y de esta forma predecir, localizar y cuantificar cambios en el cerebro debido al golpe. Para validar esta simulación, se comparó con investigaciones médicas sobre lesiones cerebrales, causadas por impactos en la cabeza. Resultados: Las predicciones matemáticas demostraron grandes efectos cerebrales: cifras que superan el 100% de riesgo. El MEF aparece pudiera ser una herramienta de cálculo práctica, universal, económica y rápida, con importantes aplicaciones para detectar evidencia de traumas cerebrales. (AU)


Asunto(s)
Humanos , Boxeo/lesiones , Frente/lesiones , Traumatismos Craneocerebrales , Análisis de Elementos Finitos , Lesiones Traumáticas del Encéfalo
19.
J Am Med Inform Assoc ; 30(7): 1305-1312, 2023 06 20.
Artículo en Inglés | MEDLINE | ID: mdl-37218289

RESUMEN

Machine learning (ML)-driven computable phenotypes are among the most challenging to share and reproduce. Despite this difficulty, the urgent public health considerations around Long COVID make it especially important to ensure the rigor and reproducibility of Long COVID phenotyping algorithms such that they can be made available to a broad audience of researchers. As part of the NIH Researching COVID to Enhance Recovery (RECOVER) Initiative, researchers with the National COVID Cohort Collaborative (N3C) devised and trained an ML-based phenotype to identify patients highly probable to have Long COVID. Supported by RECOVER, N3C and NIH's All of Us study partnered to reproduce the output of N3C's trained model in the All of Us data enclave, demonstrating model extensibility in multiple environments. This case study in ML-based phenotype reuse illustrates how open-source software best practices and cross-site collaboration can de-black-box phenotyping algorithms, prevent unnecessary rework, and promote open science in informatics.


Asunto(s)
Boxeo , COVID-19 , Salud Poblacional , Humanos , Registros Electrónicos de Salud , Síndrome Post Agudo de COVID-19 , Reproducibilidad de los Resultados , Aprendizaje Automático , Fenotipo
20.
PLoS One ; 18(5): e0286054, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37220150

RESUMEN

The use of 3D Hologram Technology (3DHT) in teaching and learning has many advantages, such as attracting students' attention, reducing cognitive load and self-effort, and improving spatial awareness. In addition, a number of studies have confirmed that the reciprocal teaching style is effective in teaching motor skills. Thus, the current study aimed to investigate the effectiveness of reciprocal style when combined with 3DHT in learning some fundamental boxing skills. A quasi-experimental design was used by creating two experimental and control groups. For the experimental group, the reciprocal style is combined with 3DHT to teach some fundamental boxing skills. In contrast, the control group is taught a program based on a teacher command style. Pretest-posttest designs were made for the two groups. The sample consisted of 40 boxing beginners aged 12 to 14 who were enrolled in the 2022/2023 training season at Port Fouad Sports Club in Port Said, Egypt. The participants were randomly divided into two experimental and control groups. There were homogenized based on age, height, weight, IQ, physical fitness, and skill level. The results showed the experimental group achieved a higher skill level due to the combination of 3DHT and a reciprocal style in compared to the control group, which relied solely on the teacher's command style,. Due to this, it is imperative to utilize hologram technology as a pedagogical resource to enhance the learning process and combine it with teaching strategies that support active learning.


Asunto(s)
Boxeo , Deportes , Humanos , Tecnología , Grupos Control , Cognición
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