Úvod: Badmintonová zranění jsou i přes celosvětovou oblibu tohoto sportu relativně opomíjenou problematikou. Metodika vyhledávání studií: Tento přehledový článek se zaměřuje na literaturu a výzkum zranění v badmintonu a na možnosti konzervativní léčby společně s rehabilitací těchto zranění. Jedním z cílů bylo shrnout poznatky z dostupných vědeckých studií publikovaných do roku 2023. Vyhledávání relevantní literatury bylo realizováno v databázích PubMed a Web of Science pomocí anglických ekvivalentů klíčových slov: badminton, zranění, etiologie, prevence, fyzioterapie. Výsledky: Celkem bylo pro tvorbu článku nalezeno a využito 51 studií, které se zabývají rizikovými faktory badmintonových zranění, jejich konkrétním typem a incidencí (zejména incidencí a rizikovými faktory), fyziologickými nároky badmintonu a možnostmi léčby daných poranění s důrazem na sportovní fyzioterapii. Studie zabývající se specificky možnostmi rehabilitace a jiných konzervativních postupů pro hráče badmintonu nebyly nalezeny. Možnosti rehabilitace vycházejí z aktuálních poznatků vztahující se obecně zejména k akutním a chronickým zraněním ve sportu. Diskuze: Ze současné evidence se jako efektivní přístup ke zraněním z přetížení jeví progresivní zatížení prvky silového tréninku s cílem navození pozitivních adaptačních změn v postižené tkáni. Ve sportovní fyzioterapii bývá hojně užíváno např. prvků kryoterapie, která ovšem pro podporu hojení a regenerace úponových bolestí nemá dostatečnou evidenci. Zranění, která vznikají akutním nedostatkem kapacity tkáně snášet nadměrnou zátěž, by měla být léčena primárně pohybovou terapií s konkrétně nastavenými parametry. Konkrétní rehabilitační postupy pozdní fáze návratu do hry jsou podmíněny specifikami sportu, jeho biomechanikou a konkrétním typem zranění. Závěr: I když je k většině zranění v badmintonu přistoupeno konzervativní metodou léčby, neexistuje dostatečná evidence vztahující se k rehabilitaci zranění specificky u badmintonistů. Cílem léčby badmintonových zranění je snížení bolestivosti, zvýšení kapacity, zlepšení koordinace a balance. Z východisek práce vyplývají následně i možnosti prevence zranění a konzervativních léčebných postupů zranění s akcentem na sportovní fyzioterapii.

Introduction: Badminton injuries are a relatively neglected issue despite the worldwide popularity of the sport. Methodology of the study search: This review article focuses on the literature and research on badminton injuries and conservative treatment options along with rehabilitation of these injuries. One of the objectives was to summarize the findings from available scientific studies published up until 2023. The search for relevant literature was performed in PubMed and Web of Science databases using the English equivalents of the keywords: badminton, injury, etiology, prevention, and physiotherapy. Results: A total of 51 studies were identified and used for the development of the article, which dealt with the risk factors of badminton injuries, their specific type and incidence (especially incidence and risk factors), the physiological demands of badminton, and treatment options for the injuries in question, with an emphasis on sports physiotherapy. Studies specifically addressing rehabilitation options and other conservative treatments for badminton players were not found. Rehabilitation options are based on current knowledge related to acute and chronic injuries in the sport in general. Discussion: From current evidence, progressive loading with elements of strength training to induce positive adaptive changes in the affected tissue appears to be an effective approach to overuse injuries. For example, elements of cryotherapy are widely used in sports physiotherapy, but there is insufficient evidence to support healing and regeneration of tendon pain. Injuries that result from an acute lack of tissue capacity to tolerate excessive load should be treated primarily with movement therapy with specific parameters. Specific rehabilitation procedures of the late phase of return to play are conditioned by the specifics of the sport, its biomechanics, and the particular type of injury. Conclusion: Although most injuries in badminton are treated conservatively, there is insufficient evidence relating to injury rehabilitation specifically for badminton players. The goal of treatment for badminton injuries is to reduce soreness, increase capacity, and improve coordination and balance. The premise of this article subsequently suggests options for injury prevention and conservative injury treatments with an emphasis on sports physiotherapy.

• MeSH
• lidé MeSH
• raketové sporty MeSH
• sportovní úrazy * etiologie   prevence a kontrola   rehabilitace   MeSH
• techniky fyzikální terapie MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• přehledy MeSH

Majkić, B, Stojanović, N, Lilić, A, and Milanović, Z. The effects of a 6-week resisted small-sided games training program on the power performance of young soccer players. J Strength Cond Res 39(7): e870-e877, 2025-Small-sided games (SSG) with additional load can improve power performance in soccer players. The purpose of this study was to determine the effects of a 6-week resisted SSG training program on power performance in young soccer players. Twenty-two under-17 top-national youth-level soccer players (age: 16.11 ± 0.41 years; height: 176.31 ± 5.71 cm; body mass: 65.16 ± 8.1 kg) were randomly allocated to a weighted vests group (WV; n = 11), which wore weighted vests of 10% of their body mass or control group (CG; n = 11) with no additional load during sessions. Subjects performed vertical jump test, sprint running test (5, 10, and 30 m), and change of direction tests (COD) (Slalom, t test, and 4 × 5 m). The 6-week experimental program, implemented into regular sessions, included 2 additional SSGs per week and consisted of 3 sets lasting 3 minutes with 3-minute rest intervals. The players were divided into 2 teams of 5 and 2 of 6 players, each consisting of a mix of players from WV and CG, and performed SSG on the field area corresponding to 75 m 2 per player. Results revealed an improvement for WV in jump height by 7.34% (ES = 1.79) and in Peak Power (PP) by 4.40%. Significant interaction effects were observed in the Slalom and 4 × 5 m tests, and there was a distinction for 5 and 30 m sprints but with no statistically significant interaction effects. It is concluded that implementing resisted SSGs during the preparatory period can enhance jump height, PP, COD, and 5 m sprint time in young soccer players.

• MeSH
• běh fyziologie   MeSH
• fotbal * fyziologie   MeSH
• lidé MeSH
• mladiství MeSH
• odporový trénink * metody   MeSH
• sportovní výkon * fyziologie   MeSH
• svalová síla * fyziologie   MeSH
• zátěžový test MeSH
• Check Tag
• lidé MeSH
• mladiství MeSH
• mužské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• randomizované kontrolované studie MeSH

INTRODUCTION: The study aimed to describe the practices and perspectives of Czech football coaches regarding the monitoring of players' training load and physical performance, with a focus on identifying key barriers and preferred sources of information. METHODS: A total of 235 football coaches completed an online survey comprehending training load monitoring methods, physical performance assessments, barriers to implementation, and information sources. RESULTS: Among respondents, 93.7% reported monitoring training load, with training diaries (70%) being the most utilized method for external load measures and heart rate (45%) for internal load. Despite this, 42.7% of coaches did not monitor internal load and 21.7% did not conduct physical fitness evaluations. The most frequently reported barrier was a lack of resources (74.5%), though elite-level coaches (52.8%) and strength and conditioning coaches (75%) identified human resources as their primary limitation. Across all levels, the Football Association was the preferred source of information (61.7%). CONCLUSION: The findings highlight the predominance of traditional monitoring practices among the Czech football coaches, alongside with notable gaps in internal load tracking and fitness evaluation. The resource constraints remain a major barrier. Practical recommendations include promoting economical monitoring tools, such as RPE, and enhancing collaboration among stakeholders to improved monitoring strategies. The Football Association's play a key role on support these efforts.

• Publikační typ
• časopisecké články MeSH

INTRODUCTION: The aim of this study was to investigate the associations between subjective and objective measures of stress and load in elite male handball players at both the group and individual levels. METHODS: In this 45-week prospective cohort study, 189 elite male handball players weekly reported their perceived stress and load across training, competition, academic, and work domains. Blood samples were collected five times during the 2022/23 season to measure cortisol and the free testosterone to cortisol ratio (FTCR). We derived a "load" variable as the sum of training, competition, academic and work hours and calculated acute, chronic, and acute-to-chronic ratio variables for both load and stress. Associations between subjective and objective measures were analyzed using Spearman's rank correlation. RESULTS: Weak to moderate positive associations were found between load and perceived stress (r = 0.19 to 0.46, p < 0.001), and between perceived stress and cortisol (r = 0.10, p = 0.023). Weak negative associations were found between perceived stress and FTCR (r = -0.18 to -0.20, p < 0.001) and between load and FTCR (r = -0.13, p = 0.003). A total of 86% of athletes had positive associations between stress and load (47% weak, 34% moderate, 5% high); 78% between stress and cortisol (27% weak, 22% moderate, 29% high); and 63% demonstrated negative associations between FTCR and load (18% weak, 32% moderate, 13% high). CONCLUSION: This study highlights the complexity between subjective and objective measures of stress and load in athletes. Understanding the link between these measures may help coaches and sports scientists streamline athlete monitoring. In cases where moderate to strong associations exist, subjective measures might serve as a reliable substitute for objective ones, making the monitoring process more time- and cost-efficient.

• Publikační typ
• časopisecké články MeSH

The term laterality refers to the preference or dominance of the lateral asymmetry of the human body. The prevalence of left-handedness is reported to be 10–13%, but in some interactive sports (e.g., fencing, racquet sports), the proportion of left-handers is higher. The left-handedness is considered an advantage in tennis; however, the one-sided load can cause muscular dysbalances leading to injuries. The research aim was to assess bilateral differences in handgrip strength youth male tennis players under-14 as to injury prevention (n = 232). In the study 12.5% were left-handed players. Handgrip strength was tested using a digital hand dynamometer (TKK 5401). A significant difference in grip strength in favor of the dominant hand was found between all players and right-handed players, only a non-significant difference was found between left-handed players. Regarding injury prevention, a difference between dominant hand and non-dominant hand force of >15% was found in 5.6% of players (high risk of injury) and >20% in 1.3% of players (very high risk). This predicts an increased risk of injury, so it is desirable to pay attention to both sides of the training load and to include compensatory or strengthening exercises.

The aim of this study was to examine the effect of attentional focus instructions on the biomechanical variables associated with the risk of anterior cruciate ligament injury of the knee joint during a drop landing task using a time series analysis. Ten female volleyball players (age: 20.4 ± 0.8 years, height: 169.7 ± 7.1 cm, mass: 57.6 ± 3.1 kg, experience: 6.3 ± 0.8 years) performed landings from a 50 cm height under three different attentional focus conditions: (1) external focus (focus on landing as soft as possible), (2) internal focus (focus on bending your knees when you land), and (3) control (no-focus instruction). Statistical parameter mapping in the sagittal plane during the crucial first 30% of landing time showed a significant effect of attentional focus instructions. Despite the similarity in landing performance across foci instructions, adopting an external focus instruction promoted reduced vertical ground reaction force and lower sagittal flexion moment during the first 30% of execution time compared to internal focus, suggesting reduced knee loading. Therefore, adopting an external focus of attention was suggested to reduce most biomechanical risk variables in the sagittal plane associated with anterior cruciate ligament injuries, compared to internal focus and control condition. No significant differences were found in the frontal and horizontal planes between the conditions during this crucial interval.

• MeSH
• biomechanika fyziologie   MeSH
• kolenní kloub * fyziologie   MeSH
• lidé MeSH
• mladý dospělý MeSH
• poranění předního zkříženého vazu patofyziologie   MeSH
• pozornost * fyziologie   MeSH
• volejbal * fyziologie   MeSH
• Check Tag
• lidé MeSH
• mladý dospělý MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články 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.

• Publikační typ
• časopisecké články MeSH

Research on the external physical load on elite youth soccer players during the weekly training microcycle in competitive periods and official matches is limited. The aims of this study were twofold: a) investigate possible differences in external physical load (PL) across player positions in U17 elite youth soccer players during official matches; b) determine the weekly training to match physical load ratio (WTMLr) across player positions. The sample included 20 outfield players from an elite soccer academy (mean age 15.94 ± 0.25 years) playing in four positions: central defender (CD), full-back (FB), central midfielder (CM) and Striker (S). Data were collected during the spring in-season period for 17 official matches played in a 4-3-3 game format. Indicators of external physical load monitored were: total distance (TD); total distance in high-speed running (HSR; > 16.1 km.h-1); total distance in sprint running (SPR; > 21.6 km.h-1); and relative physical load intensity (%HSR). The WTMLr was calculated for TD, HSR, SPR and %HSR as the ratio of the average weekly sum of training PL to the average sum of PL in an official match for a given players' position. Collectively, the training intensity during a one-week microcycle (%HSR in WTMLr) achieved only 76 % of match demands. CD performed significantly lower in all measured indicators of external PL during the official match than all other positions (p < 0.05; g > 0.80) except for TD in S. S achieved significantly higher SPR during official matches compared to CD (p < 0.05; g > 0.80), CM, and FB (g > 0.80). In contrast, CD reported higher WTMLr (medium-large effect size) in HSR and SPR indicators than all other positions. CM performed significantly higher %HSR in WTMLr than S and FB (p < 0.05; g > 0.80). Results revealed insufficient training intensity relative to match demands and, at the same time, weekly training PL did not meet match demands (especially in HSR and SPR) for players across the different positions. Therefore, practitioners should select appropriate training methods (drills and games) to ensure sufficient training intensity (HSR and SR metrics) and consider using the WTMLr, which can be used to help optimise and individualise training PL for different player positions.

• MeSH
• běh * MeSH
• fotbal * MeSH
• geografické informační systémy MeSH
• lidé MeSH
• mladiství MeSH
• roční období MeSH
• Check Tag
• lidé MeSH
• mladiství MeSH
• Publikační typ
• časopisecké články MeSH

In light of previous research highlighting the prevalence of asymmetries in soccer players and possible links to injury risks, there is a crucial gap in the biomechanical understanding of complex relationships between lower extremity and trunk asymmetries in elite soccer players. The purpose of this study was to investigate the level, relationships, and differences among twelve different parameters of strength, morphological, and neuromuscular asymmetries in elite soccer players. Methods: Elite male soccer players (n = 25, age 21.7 ± 3.9 years) were tested in the following tests: bilateral fluid distribution, hip flexor range of motion, postural stability, isokinetic strength of knee extensors and flexors, isometric lateral trunk rotation strength, eccentric strength of knee flexors, isometric bilateral strength of hip adductors, and vertical ground reaction force in counter-movement jump-free arms, counter-movement jump, squat jump, and drop jump tests. One-way ANOVA, Pearson's coefficient (r), and partial eta squared (ηp2) were used for data analysis. Results: Significant differences in asymmetries were found in elite soccer players (F11,299 = 11.01, p < .01). The magnitude of asymmetry over 10% was in postural stability and drop jump parameters. The lowest magnitudes of asymmetries were in the fluid distribution of the lower limbs and the vertical ground reaction force during the take-off phase in squat jumps. The highest asymmetries between the dominant and non-dominant sides were found in postural stability and drop jump. A total of eleven significant correlations (p < 0.05, r = 0.41-0.63, R2 = 0.17-0.40) were detected between the analyzed asymmetries in elite soccer players. The lateral trunk rotation asymmetries were significantly correlated to vertical ground reaction force asymmetries and knee extensors. Conclusion: Long-term exposure in elite soccer leads to unilateral biomechanical loading that induces abnormal strength and morphological adaptations in favor of the dominant side while linking lower limb and trunk strength asymmetries. By unraveling these complex relationships, we strive to contribute novel methods that could inform targeted training regimens and injury prevention strategies in the elite soccer community. The data should encourage future researchers and coaches to monitor and develop trunk strength linked to lower body kinematics.

• Publikační typ
• časopisecké články MeSH

Kolinger D, Stastny P, Pisz A, Krzysztofik M, Wilk M, Tsoukos A, and Bogdanis GC. High-intensity conditioning activity causes localized postactivation performance enhancement and nonlocalized performance reduction. J Strength Cond Res 38(1): e1-e7, 2024-This study aimed to examine whether a conditioning activity (CA) performed by the legs (barbell back squat) may cause postactivation performance enhancement (PAPE) on muscle groups other than leg extensors in isokinetic (eccentric [ECC] and concentric [CON]) and dynamic movement. Twelve male basketball players (age: 21.3 ± 3.2, body mass: 89.6 ± 14.1 kg, height: 187.4 ± 4.6 cm, and 1 repetition maximum (1RM) barbell back squat: 113 ± 21 kg) with previous resistance-training experience of at least 2 years, performed 3 sets of 3-4 repetitions of back-squats with submaximal load (60, 90, and 90% 1RM) as CA. Before and after the CA, they performed pretest and post-test in the form of countermovement jumps (CMJs) (localized) or explosive push-ups (EPUs) (nonlocalized) along with isokinetic flexion and extension at the knee (localized) or at the elbow (nonlocalized). The localized and nonlocalized protocols were divided into 2 days in a randomized order. The back squat as CA significantly increased peak torque (PT) (p < 0.05) in all CON and ECC muscle actions and average power per repetition (APPR) (p < 0.05) (all muscle actions except ECC flexion) of the localized isokinetic tests with large (>0.8) and medium (0.4-0.79) effect sizes and significantly decreased (p < 0.01) the PT and APPR (p < 0.01) of the nonlocalized isokinetic test in the ECC flexion. The CMJ and EPU tests showed no significant differences (p > 0.05) between premeasures and postmeasures of take-off height. The effect of PAPE seems to be specific to the muscles most involved in the CA, and the CA inhibits PT of subsequent muscle ECC contractions in muscles not involved in the CA.

• MeSH
• dospělí MeSH
• kolenní kloub MeSH
• koleno MeSH
• kosterní svaly fyziologie   MeSH
• lidé MeSH
• mladiství MeSH
• mladý dospělý MeSH
• odporový trénink * metody   MeSH
• svalová síla * fyziologie   MeSH
• Check Tag
• dospělí MeSH
• lidé MeSH
• mladiství MeSH
• mladý dospělý MeSH
• mužské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH