BACKGROUND: Ice hockey is a dynamic game. We can observe collisions between the players that bring a risk of injury. There are many hockey clubs in the Czech Republic. These clubs raise great hockey players and many competing players in various levels of national leagues. The aim of this study was to map injuries in Czech hockey players and outline the situation of injury prevention and body care in ice hockey players. METHODS: We used a questionnaire survey method to obtain data. We received answers from 100 male active Czech ice hockey players, playing in the top three highest men's competitions (Extraleague - 2nd league). Individual injuries were analyzed according to specific body parts, injury type, playing position, level of competition using basic statistical characteristics and relative frequency analyses, including the recovery time, injury reason and the injury statistics per 1000 sporting performances in ice hockey. RESULTS: We found that 81% of participants suffered injuries with the overall incidence of injuries was 17.1 per 1000 sports performances and mainly happened during the match compared to training. The most common injuries were in the head and neck area (25%), often caused by a collision with another player, a stick or puck hit, or a collision with a board. Other frequently injured parts were the knees (21%), where internal ligament injuries predominate, and the shoulders (20%), where we recorded mainly ligament injuries. CONCLUSIONS: There is a high risk of various injury types of ice hockey players, that are developed accidentally in all body parts mostly in the match (mostly upper part of the body and knee) or by overloading (hip/groin area). We recommend strategies to avoid or minimize the injury risk of players. The hockey clubs, coaches, and players should extensively and regularly cooperate with physiotherapists, starting from the younger age of hockey groups, to prevent injuries and use regular strengthening of crucial muscle parts, regeneration, and compensatory exercises. We endorse adequately evaluating dangerous foul actions for referees and disciplinary officials also in minor competitions.
- MeSH
- Adult MeSH
- Hockey * injuries MeSH
- Incidence MeSH
- Humans MeSH
- Young Adult MeSH
- Surveys and Questionnaires MeSH
- Athletic Injuries * epidemiology prevention & control MeSH
- Check Tag
- Adult MeSH
- Humans MeSH
- Young Adult MeSH
- Male MeSH
- Publication type
- Journal Article MeSH
- Geographicals
- Czech Republic MeSH
Jednou z hlavních herních činností jednotlivce, na které záleží úspěch či neúspěch týmu v plážovém volejbale, je nahrávka. Nahrávka je činnost charakterizována jako odbití míče po přihrávce k vybranému smečaři. Jednou z hlavních svalových skupin, které jsou pro plážové volejbalisty důležité jsou hamstringy. Hamstringy pomáhají s flexí dolní končetiny v koleni a pomáhají s extenzí dolní končetiny v kyčelním kloubu. Studie si klade za cíl posoudit aktivitu hamstringů u vybrané herní činnosti. Studie předpokládá, že zapojení pravé a levé strany při nahrávce spodem i při nahrávce vrchem bude stejné. Zároveň je předpokládem, že u nahrávky spodem obouruč, bude aktivita hamstringů vyšší než u nahrávky vrchem obouruč. Hlavní použitou metodou pro sběr dat bylo měření pomocí povrchové elektromyografie. Pro sběr dat byl použit přístroj Ultium (Noraxon, USA), společně s kamerovým systémem Nixon. Pro zpracování dat bylo použito prostředí pro statistické výpočty R. Pro výpočet testových kritérií byl použit Mannův-Whitney U test. Z jeho výsledků vyplývá, že strany jsou do nahrávky zapojené symetricky. Nicméně statisticky významný rozdíl se projevuje mezi nahrávkou pomocí odbití vrchem a odbitím spodem u pravého bicepsu (P = 0,0337) i u pravého semitendinosus (P = 0,0097). Z výsledků můžeme konstatovat, že u nahrávky by nemělo docházet ke svalovým dysbalancím.
One of the main playing activities of an individual that depends on the success or failure of a team is setting. The setting is characterised by the action as the beating of a ball after a pass to the attacker. One of the main muscle groups that are important to beachvolleyball players is hamstrings. Hamstrings help with lower leg flexion in the knee and help with lower leg extension in the hip joint. The study aims to assess hamstring activity in selected gaming activity. We assume that the involvement of the right and left sides in the setting at the bottom and in the setting at the top will be the same.The main method used for data collection was measurement using surface electromyography. The Ultium (Noraxon, USA) instrument was used to collect the data, along with the Nixon camera system.Mann Whitney U test was used for statistical calculations The results indicate that the parties are symmetrically involved in the setting. However, a statistically significant difference occurs between the setting using the upper and lower strokes of the right bicep (P = 0,0337) and the right semitendinosus (P = 0,0097). We can conclude from the results that there should be no muscular imbalance in the setting.
- MeSH
- Data Analysis MeSH
- Biomechanical Phenomena physiology MeSH
- Electromyography methods MeSH
- Humans MeSH
- Adolescent MeSH
- Musculoskeletal System MeSH
- Postural Balance physiology MeSH
- Videotape Recording methods MeSH
- Volleyball * statistics & numerical data MeSH
- Hamstring Muscles * physiology MeSH
- Check Tag
- Humans MeSH
- Adolescent MeSH
- Female MeSH
- Publication type
- Clinical Study MeSH
- Research Support, Non-U.S. Gov't MeSH
INTRODUCTION: During the 20th century, the life expectancy increased by 30 years. At the same time, the number of people living longer than that has grown significantly. The aim of this study was to investigate whether total hip or knee arthroplasty (THA or TKA) in patients over 80 years of age does not reduce their life expectancy. MATERIAL AND METHODS: The study examined the data of patients who had undergone THA or TKA between 1994 and 2002 and were older than 80 years at the time of surgery. The study group was divided into a group of patients in whom elective total hip or knee arthroplasty was performed for arthritis and into a group of patients who underwent the same procedure for proximal femur fracture. The investigated parameter was the real survival, which was compared with the life expectancy predicted by the Institute of Health Information and Statistics of the Czech Republic. We also monitored postoperative mortality and postoperative interval after which the life expectancy was no longer reduced. RESULTS: The study included 547 patients. Of whom, 96 patients underwent elective surgery (36%) and 351 patients underwent surgery for intracapsular hip fracture (64%). In the elective surgery group, the survival was longer than the national average: In the 80-84-year group, the median survival was 6.0 years vs. median life expectancy of 5.6 years; in the 85-89-year group, the median survival was 6.3 years vs. median life expectancy of 3.9 years. The fracture surgery group showed a decrease in the life expectancy compared to the national average - in the 80-84-year group, the median survival was 3.5 years vs. median life expectancy of 5.6 years, and in the 85-89-year group, the median survival was 2.9 years vs. median life expectancy of 3.9 years. The likelihood of postoperative mortality was significantly higher in the fracture group than in the elective group (p = 0.05 vs. 0.01), with the difference being the highest in the first 8 weeks after surgery. CONCLUSIONS: Correctly indicated THA or TKA in patients over 80 years of age improves the quality of life of these patients and does not reduce the life expectancy. Intracapsular femoral neck fractures in patients of that age can still be considered as an indication for surgical treatment as a life-saving procedure. KEY WORDS: total hip arthroplasty, total knee arthroplasty, osteoarthritis, hip fracture, life expectancy.
- MeSH
- Humans MeSH
- Survival Rate MeSH
- Life Expectancy * MeSH
- Arthroplasty, Replacement, Hip * mortality methods MeSH
- Aged, 80 and over MeSH
- Arthroplasty, Replacement, Knee * mortality MeSH
- Check Tag
- Humans MeSH
- Male MeSH
- Aged, 80 and over MeSH
- Female MeSH
- Publication type
- English Abstract MeSH
- Journal Article MeSH
Souhrn: Propojení těla a mysli a jejich vzájemná konjunkce jsou stále aktuálnějším, mnohooborovým tématem. Cíl: Cílem práce bylo zjistit, do jaké míry působí naše myšlenky v profesionálním tanečním prostředí na průběh mozkových frekvencí a jakým způsobem se propisují do našeho organizmu a pohybu. Metody: V rámci studie proběhlo měření mozkové činnosti nositelným EEG zařízením Muse a vizuální analýza pohybu z tanečního prostředí, prvku plié (flexe a extenze kolenních kloubů). Sledovanými a měřenými jedinci bylo 16 studentů Katedry tance, Hudební a taneční fakulty Akademie múzických umění v Praze. Sledovali jsme mozkové frekvence v mnoha fázích (situacích): bez konkrétní myšlenky (soustředění se) a bez pohybu, při konkrétní myšlence bez pohybu, pohyb bez konkrétní myšlenky, pohyb s konkrétní myšlenkou a na závěr opět myšlenku bez pohybu, která byla mimo obor a rámec výzkumu. Výsledky: U 14 účastníků experimentu jsme získali dostatečně kvalitní EEG signál k další analýze. U 12 účastníků byla prokázána změna v mozkových frekvencích odlišujících aktivity s nižší a vyšší vědomou koncentrací. Závěr: Výstup popisuje zjištění ohledně propojení myšlenek, těla a pohybu na základě měřitelných dat. EEG zařízení Muse je použitelné pro získávání EEG signálu dostatečné kvality v experimentech vyžadujících pohyb odehrávající se v reálných podmínkách. V získaném EEG signálu je možné detekovat změny v mozkové aktivitě účastníků při stavech uvolněné bdělosti a vědomé koncentrace. Vizuální analýza pohybu reflektuje, že syntéza specifické myšlenky a pohybu přispívá k eliminaci špatných pohybových návyků, které ruší nejen technickou čistotu provedení pohybového prvku, ale také optimální držení těla, koordinaci pohybu a jednotlivých anatomických struktur.
Summary: The connection of body and mind and their mutual conjunction is an increasingly topical topic in many fields. Objective: The aim of the work was to find out to what extent our thoughts in a professional dance environment affect the course of brain frequencies and how they are prescribed in our organism and movement. Methods: As part of the study, brain activity was measured with the Muse wearable EEG device and visual analysis of movement from the dance environment, the plié element (flexion and extension of the knee joints). The monitored and measured individuals were 16 students of the Dance Department of Music and Dance Faculty of the Music Academy of Performing Arts in Prague. We monitored brain frequencies in many phases (situations): without a specific thought (concentration) and without movement, with a specific thought without movement, movement without a specific thought, movement with a specific thought, and finally again a thought without movement, which was out of scope and research framework. Results: For 14 participants in the experiment, we obtained an EEG signal of sufficient quality so that it could be further analyzed. A change in brain frequencies distinguishing activities with lower and higher conscious concentration was demonstrated in 12 participants. Conclusion: The output describes the findings regarding the connection of thoughts, body, and movement based on measurable data. The Muse EEG device is useful for obtaining an EEG signal of sufficient quality in experiments requiring movement and taking place in real conditions. In the obtained EEG signal, it is possible to detect changes in the participant‘s brain activity during states of relaxed alertness and conscious concentration. Visual analysis of movement reflects that the synthesis of a specific thought and movement contributes to eliminating bad habits, which destroy not only the technical purity of the performance of the movement element but also optimal posture, coordination of movement, and individual anatomical structures.
- MeSH
- Electroencephalography methods MeSH
- Humans MeSH
- Brain Mapping * MeSH
- Movement physiology MeSH
- Attention MeSH
- Dancing MeSH
- Check Tag
- Humans MeSH
- Publication type
- Clinical Study MeSH
The phenomenon of post-activation performance enhancement plays an unidentified role in movement eccentric speed and individual muscle group responses. Therefore, this study aimed to determine whether the loaded front squat (FSq) speed of the eccentric phase would influence the post-activation performance enhancement effect and whether the FSq would elicit similar performance enhancement of knee flexion, knee extension, hip flexion, and hip extension muscles. Twenty resistance-trained handball players performed the FSq under maximum eccentric-concentric speed and 2-s eccentric speed (only the eccentric phase performed), while pre- and post-front squat countermovement jump, knee, and hip isokinetic flexion/extension performance were tested. The FSq conditioning activity was performed in a single set of three repetitions with either 90% (maximum eccentric-concentric speed) or 120% (2-s eccentric speed) of one repetition maximum, and post-performance was measured 4-12 min after the FSq. Athletes randomly changed the FSq eccentric speed and tested the hip or knee isokinetic flexion/extension strength at 180°/s. ANOVA showed that the rate of force development during the jump increased (Cohen d = 0.59-0.77) with no differences between 2-s eccentric and maximum speed eccentric protocols. Isokinetic strength increased after the 2-s eccentric FSq in hip extension (d = 0.76-0.86), knee flexion (d = 0.74-0.88), and hip flexion (d = 0.82), with no differences in knee extension strength. After maximum eccentric-concentric speed, isokinetic strength increased in hip extension (d = 1.25). In conclusion, the FSq conditioning activity enhances hip extensors' performance more than knee extensors' performance. Different eccentric types of muscle action during a conditioning activity alter the level of local muscle enhancement.
- Publication type
- Journal Article MeSH
This unique study provides information on Cr species and their distribution in periprosthetic tissues of patients with metal-on-polyethylene joint implants. Co-Cr-Mo alloy has been widely used in joint replacement and represents a source of metal derived species. In the case of chromium, previous studies on periprosthetic tissues revealed mainly Cr(III) distribution, whereas the potential release of carcinogenic Cr(VI) species has been still a subject of debate. Here, an analytical approach utilizing speciation and fractionation was developed to analyze periprosthetic tissue samples collected from wide range of patients with failed total hip or knee replacements. The results reveal that Cr(III) is mainly released in the form of insoluble CrPO4 and Cr2 O3 particles. The highest Cr contents were found in periprosthetic tissues of patients suffering from aseptic loosening and having more Cr-based implants in the body. Cr species penetrated tissue layers, but their levels decreased with the distance from an implant. The detailed speciation/fractionation study carried out using the set of consecutive periprosthetic tissues of a patient with extensive metallosis showed the presence of trace amounts of free Cr(III), nanoparticles, and metal-protein complexes, but the majority of Cr still occurred in CrPO4 form. Carcinogenic Cr(VI) species were not detected. Up to date, there is no published human tissue study focused on the detailed speciation of both soluble and insoluble Cr-based species in the context of failing total hip and knee replacements.
- MeSH
- Chromium MeSH
- Metals MeSH
- Hip Prosthesis * MeSH
- Humans MeSH
- Arthroplasty, Replacement, Hip * MeSH
- Prosthesis Failure MeSH
- Arthroplasty, Replacement, Knee * MeSH
- Check Tag
- Humans MeSH
- Publication type
- Journal Article MeSH
Impact force and maximum velocity are important indicators of kick efficiency. Therefore, this systematic review compared the front kick (FK) and roundhouse kick (RK), including their impact force, maximum velocity, angular velocity, and execution time, considering various target types and experience levels. Following PRISMA guidelines, the Web of Science, SportDiscus, and PubMed were systematically searched for articles published from January 1982 to May 2022. Normalized kicking values were compared using one-way ANOVA. Eighteen articles included FKs (sample: 113 elite men, 109 sub-elite men, and 46 novices), and twenty-five articles included RKs (sample: 238 elite men, 143 sub-elite men, and 27 novice men). The results indicate that the impact force of the FK were 47% (p < 0.01), 92% (p < 0.01), and 120% (p < 0.01) higher than those of the RK across novice, sub-elite, and elite groups, respectively. Moreover, the maximum foot velocity of the RK was 44% (p < 0.01) and 48% (p < 0.01) higher than that of the FK for the sub-elite and elite groups, respectively. Furthermore, the elite group had 65% (p < 0.01) higher knee extension angular velocity with the RK than with the FK and 138% (p < 0.01) higher hip extension angular velocity with the FK than with the RK. In summary, the findings suggest that the FK is more effective in generating forceful kicks, while the RK has the potential for rapid execution.
- Publication type
- Journal Article MeSH
- Review MeSH
Factor VIII (FVIII) inhibitor formation is a major clinical concern during replacement therapy in patients with hemophilia A. Immune tolerance induction (ITI) is the only therapeutic approach to attempt inhibitor eradication and establishment of long-term immune tolerance to FVIII. Hemophilia Inhibitor Previously Untreated Patient (PUP) Study (HIPS) was a prospective clinical trial to investigate changes in the immune system of PUPs with severe hemophilia A. Five patients who developed persistent FVIII inhibitors during HIPS entered an ITI extension arm (HIPS-ITI). During HIPS-ITI, inhibitor patients received ITI with the same FVIII product (a single source of recombinant, human full-length FVIII) used in HIPS until successful tolerance, declared failure, or a maximum of 2 years after HIPS-ITI enrollment, whichever came first. Blood samples and clinical data were collected monthly. Longitudinal FVIII-binding antibody signatures, associated binding specificities, and apparent affinities were determined for each patient at each sampling time point. ITI was successful or partially successful in 2 patients and failed in 3. Both groups presented with distinct FVIII-specific antibody signatures. ITI success required the disappearance of FVIII inhibitors, which was associated with the eradication or sustained titer minimization of high-affinity FVIII-specific antibodies, particularly of the immunoglobulin G1 (IgG1) and IgG4 subclasses. In contrast, ITI failure, as reflected by FVIII inhibitor persistence, was associated with persistent high-affinity FVIII-specific antibodies. Interestingly, 1 patient with partial ITI success and 1 patient with ITI failure developed apparent oligoreactive FVIII-binding antibodies during ITI. The explanation of the true nature of these antibodies requires more comprehensive follow-ups in future studies. This trial was registered at www.clinicaltrials.gov as #NCT01652027.
PURPOSE OF THE STUDY The increasing prevalance of patients with metastatic bone cancer and their improved survival puts more emphasis on the quality of treatment of bone metastases. Although most pelvic lesions are treated non-operatively, extensive destruction of the acetabular segment poses a therapeutic challenge. A potential treatment option may be the modified Harrington procedure. MATERIAL AND METHODS At our department, this surgical procedure has been opted for in 14 patients (5 men and 9 women) since 2018. The mean age at the time of surgery was 59 years (range 42 to 73). Twelve patients suffered from metastatic cancer, one patient had a fibrosarcoma metastasis and one female patient presented with aggressive pseudotumor. Radiological and clinical followup of the patients was performed. Pain was assessed using the Visual Analogue Scale, and the Harris Hip Score and the MSTS score were used to evaluate the functional outcome. The paired samples Wilcoxon test was used to analyze the statistical significance of the difference. RESULTS The mean follow-up period was 25 months. At the time of assessment, ten patients were alive with the mean follow-up of 29 months (range 2 to 54 months) and four patients had died of cancer progression, with the mean follow-up being 16 months. No perioperative death or mechanical failure were reported. One female patient developed a hematogenous infection during febrile neutropenia, which was successfully managed with early revision and implant preservation. Statistically, a significant improvement in the MSTS (median 23) and HHS (median 86) functional scores compared to the preoperative values (MSTS median 2, p<0.01, r-effect size = 0.6; HHS preop median 0, p<0.005, r-effect size = -0.7) was observed. There was also a statistically significant reduction in pain (VAS postoperative median 1, VAS preoperative median 8, p<0.01, r-effect size = -0.6). All patients were capable of independent ambulation after the surgery, nine patients walked without support. DISCUSSION There are not many alternatives to this surgical procedure. Apart from non-operative palliative treatment, the options include ice cream cone prostheses or customized 3D implants which are, impractical in terms of time and cost. Our results are comparable to other studies, confirming the reproducibility and reliability of the method. CONCLUSIONS The Harrington procedure is an efective method for management of large acetabular tumor defects with good functional outcomes, an acceptable perioperative risk and a low risk of failure in the medium term, thus suitable also for patients with good cancer prognosis. Key words: umor, metastasis, acetabulum, pelvis, Harrington, reconstruction.
- MeSH
- Acetabulum surgery MeSH
- Adult MeSH
- Middle Aged MeSH
- Humans MeSH
- Bone Neoplasms * surgery MeSH
- Arthroplasty, Replacement, Hip * methods MeSH
- Reproducibility of Results MeSH
- Retrospective Studies MeSH
- Aged MeSH
- Treatment Outcome MeSH
- Plastic Surgery Procedures * MeSH
- Check Tag
- Adult MeSH
- Middle Aged MeSH
- Humans MeSH
- Male MeSH
- Aged MeSH
- Female MeSH
- Publication type
- English Abstract MeSH
- Journal Article MeSH
PURPOSE: The loss of muscle functions is a significant health issue among dialysis patients. Poor muscle strength negatively affects a patient's mobility, independence and quality of life. The aim of the study was to assess the effects of an intradialytic resistance training (IRT) on lower extremity muscle functions among dialysed patients. MATERIALS AND METHODS: Ninety patients were allocated into an experimental group (n = 57) or control group (CNG) (n = 33) according to the location of the dialysis service center. Fifty-eight patients completed the study follow-up. The intervention regarded 12-week IRT, while the controls remained physically inactive during hemodialysis. In both groups of patients, we assessed lower extremity muscle functions by a diagnostics of maximal isometric force generated during hip flexion (HF), hip extension (HE), and knee extension (KE) contractions at baseline, after the 12-weeks intervention and after a further 12-weeks follow up. RESULTS: We found that improvements in HE between baseline and post-intervention were significantly larger for the experimental than the CNG (difference 32.0, 95% CI = 12.3-51.8, p = 0.002). For the other primary outcomes, we found no differences between the groups, and neither for the two other indices of muscle strength (HF and KE). At 12-weeks follow-up, we found no statistically significant differences between the two groups. CONCLUSIONS: Our findings indicate that exercise during dialysis not just suppresses adverse effects in muscle strength and functioning, but effectively and safely increases lower extremities muscle function in a relatively short time.Implications for RehabilitationRegular, progressive, resistance training realized during dialysis is well tolerated and safe for exercise interventions in hemodialysis patients.A 12-weeks intradialytic resistance training is effective in the prevention and clinical management of muscle function loss among hemodialysis patients.The range of improvements in muscle functions, demonstrated by the assessment of maximal isometric force, varied severely during different lower extremity movements of hemodialysis patients.
- MeSH
- Renal Dialysis adverse effects MeSH
- Lower Extremity MeSH
- Quality of Life MeSH
- Humans MeSH
- Resistance Training * MeSH
- Muscle Strength physiology MeSH
- Muscles MeSH
- Check Tag
- Humans MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
