Najčastejším symptomatickým prejavom syndrómu iliotibiálneho traktu (ITBS – iliotibial band syndrome) je bolesť bočnej časti kolena, ktorá je spojená s opakovanými pohybovými aktivitami. Pacienti bolesť často udávajú ako bodavú v oblasti okolo laterálneho femorálneho epikondylu, ktorá môže vyžarovať dole iliotibiálnym smerom do holennej kosti. V proximálnej časti stehna dostáva iliotibiálny trakt (ITB) fasciálne časti z hlbokej fascie stehna, m. gluteus maximus a m. tensor fasciae latae. ITBS sa vo väčšine prípadov úspešne lieči neoperačným manažmentom, hoci niekedy je potrebný chirurgický zákrok. Etiológia ITBS je predmetom kontroverzných diskusií. Pre ITBS bolo navrhnutých niekoľko etiológií, vrátane trenia ITB o laterálny femorálny epikondyl, kompresie tukového tkaniva a spojivového tkaniva a chronický zápal burzy ITB. ITBS je diagnóza založená na klinickom prejave. Dôležitým nálezom pri klinickom vyšetrení je lokálna citlivosť laterálnej časti kolena pod epikondylom a nad kĺbovou líniou. Rehabilitácia u pacientov so ITBS predstavuje dôležitú časť komplexnej liečby, ktorá zohráva kľúčovú úlohu pri liečbe ITBS.
Summary: The most common symptomatic manifestation of iliotibial band syndrome (ITBS) includes pain in the lateral part of the knee, which is associated with repetitive movement activities. Patients often describe pain in the area around the lateral femoral epicondyle, which can radiate down the iliotibial direction into the tibia. In the proximal part of the thigh, the iliotibial tract (ITB) receives fascial parts from the deep fascia of the thigh, gluteus maximus, and tensor fasciae latae. ITBS is often successfully treated with non-operative management, although surgery is sometimes required. The etiology of ITBS has been the subject of controversial discussions. Various etiologies have been proposed for ITBS, including friction of the ITB against the lateral femoral epicondyle, compression of the adipose tissue and the connective tissue, and chronic inflammation of the ITB bursa. ITBS is a diagnosis based on clinical presentation. Local tenderness of the lateral part of the knee below the epicondyle and above the joint line is an important finding during physical examination. Rehabilitation in patients with ITBS is an important part of comprehensive treatment that plays a key role in the therapy of ITBS.
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
In this dynamic scanning protocol, ultrasound examination of the knee is described using various maneuvers to assess different conditions. Real-time patient examination and scanning videos are used for better simulation of the daily clinical practice. The protocol is prepared by several/international experts in the field of musculoskeletal ultrasound and within the umbrella of European Musculoskeletal Ultrasound Study Group in Physical and Rehabilitation Medicine/Ultrasound Study Group of the International Society of Physical and Rehabilitation Medicine.
- MeSH
- kolenní kloub diagnostické zobrazování MeSH
- koleno MeSH
- lidé MeSH
- muskuloskeletální nemoci * rehabilitace MeSH
- rehabilitační lékařství * MeSH
- svaly MeSH
- ultrasonografie MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
The purpose of this study was to examine the effects of rowing stroke rates on lower extremity intra-joint coordination variability in professional rowers. Fifteen experienced young rowers volunteered to participate in this study. Kinematic data were recorded at different rowing speeds with seven Vicon cameras. The continuous relative phase (CRP) and CRP variability (CRPV) were used to calculate joint coordination and coordination variability, respectively, for the hip, knee, and ankle in the sagittal and horizontal planes, and a comparison was made among different rowing stroke rates. A vector analysis repeated measure ANOVA using statistical parametric mapping revealed that there were statistically significant differences in the hip-ankle, hip-knee, and knee-ankle CRPs for rowing at different stroke rates. Moreover, there was higher CRPV in the mid-drive and mid-recovery phases and less variability in the transition from the drive phase to the recovery phase. The results demonstrate the importance of knee joint in rowing tasks in experienced rowers during submaximal rowing stroke rate and the shift of movement to the hip at higher rowing stroke rate. Moreover, there was a smaller variability during drive-to-recovery transition, which may suggests an increased risk for overuse injuries.
- MeSH
- biomechanika MeSH
- dolní končetina MeSH
- koleno MeSH
- kotník MeSH
- lidé MeSH
- sporty * MeSH
- vodní sporty * MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
INTRODUCTION: The aim of In this study was to verify the relationship among clinical indicators of patellofemoral pain syndrome (PFPS) and the results of modifying radiological investigation. Previous research suggests that there is a poor association between them. Therefore we have employed a technique for the functional evaluation of PFPS based on measuring the stiffness of the knee joint during passive flexion (biorheometry). METHOD: The correlation between clinical examination and a standardized Lysholm score, radiological and biorheometric measures was investigated in the 28 knee joints of 14 subjects exhibiting clinical features of PFPS. A modified axial radiological projection of the patellofemoral articulation in 90° of flexion provided the parameters quantifying the anatomical - morphological arrangement of the patellofemoral joint. The biorheometric properties of the knee were evaluated using a custom made measuring apparatus during passive flexion and extension of the knee. RESULTS: Our results confirm that the link between the clinical findings and the X-ray imaging examinations was not evident. On the contrary, the biorheometric examination proved to correlate well with the clinical symptoms of PFPS. Parameters were identified which can characterize the biorheograms of people suffering PFPS. CONCLUSIONS: Analysis of the relationship among the clinical, radiological and biorheometric examinations leads to the recommendation that biorheometric examination is an effective method for the objective assessment of PFPS.
- MeSH
- kolenní kloub diagnostické zobrazování MeSH
- koleno MeSH
- lidé MeSH
- patelofemorální kloub * diagnostické zobrazování MeSH
- patelofemorální syndrom * MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
There are relatively few running studies that have attempted to prospectively identify biomechanical risk factors associated with Achilles tendon (AT) injuries. Therefore, the aim was to prospectively determine potential running biomechanical risk factors associated with the development of AT injuries in recreational, healthy runners. At study entry, 108 participants completed a set of questionnaires. They underwent an analysis of their running biomechanics at self-selected running speed. The incidence of AT running-related injuries (RRI) was assessed after 1-year using a weekly questionnaire standardized for RRI. Potential biomechanical risk factors for the development of AT RRI injury were identified using multivariable logistic regression. Of the 103 participants, 25% of the sample (15 males and 11 females) reported an AT RRI on the right lower limb during the 1-year evaluation period. A more flexed knee at initial contact (odds ratio = 1.146, P = .034) and at the midstance phase (odds ratio = 1.143, P = .037) were significant predictors for developing AT RRI. The results suggested that a 1-degree increase in knee flexion at initial contact and midstance was associated with a 15% increase in the risk of an AT RRI, thus causing a limitation of training or a stoppage of running in runners.
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- Achillova šlacha * MeSH
- běh * zranění MeSH
- biomechanika MeSH
- dolní končetina MeSH
- koleno MeSH
- lidé MeSH
- poranění kotníku * MeSH
- prospektivní studie MeSH
- Check Tag
- lidé MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
The diagnostic accuracy of tensiomyography (TMG) parameters compared to the gold standard in neuromuscular fatigue evaluation using voluntary and electrically induced muscle activation is unclear. This study aimed to investigate the diagnostic accuracy of TMG parameters to detect individual changes after interventions that were designed to induce central or peripheral fatigue. Nineteen males (age: 32.2 ± 9.3 years) performed two interventions, consisting of maintaining 25% of maximal voluntary contraction (MViC25%) and a 30 s all-out cycling test (Wingate), respectively. TMG parameters, maximum voluntary contraction (PtMViC), voluntary activation (VA%) and electrically elicited double twitches (Dtw) were assessed on the knee extensors before (PRE), one minute (POST) and seven minutes after (POST7) the intervention. The diagnostic accuracy (AUC) of TMG parameters were evaluated in comparison to two criteria measures (PtMViC and Dtw). RM ANOVA revealed a significant interaction between the effects of intervention and time on VA% (p = 0.001) and Dtw (p < 0.001) but not for PtMViC (p = 0.420). AUC showed that TMG parameters had a good ability in detecting muscular fatigue assessed by Dtw but not by PtMViC. The results of the current study suggest that TMG parameters can be used to monitor peripheral neuromuscular fatigue.
- MeSH
- dolní končetina MeSH
- dospělí MeSH
- elektromyografie MeSH
- kolenní kloub fyziologie MeSH
- koleno fyziologie MeSH
- kosterní svaly * fyziologie MeSH
- lidé MeSH
- mladý dospělý MeSH
- svalová kontrakce fyziologie MeSH
- svalová únava * fyziologie MeSH
- Check Tag
- dospělí MeSH
- lidé MeSH
- mladý dospělý MeSH
- mužské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
POZOR! při kopírování abstrakt kontrolovat slova na konci řádků originálu!!!
POZOR! při kopírování abstrakt kontrolovat slova na konci řádků originálu!!!
- MeSH
- bakteriemie farmakoterapie patofyziologie MeSH
- C-reaktivní protein analýza MeSH
- Corynebacterium diphtheriae izolace a purifikace MeSH
- infekční artritida * diagnóza farmakoterapie MeSH
- jaterní cirhóza MeSH
- koleno patologie MeSH
- korynebakteriální infekce * diagnóza farmakoterapie MeSH
- lidé bez domova MeSH
- lidé středního věku MeSH
- lidé MeSH
- péče o pacienty v kritickém stavu MeSH
- sportovní úrazy MeSH
- Check Tag
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- Publikační typ
- kazuistiky MeSH
Valdes, O, Inzulza, S, Collao, N, Garcia-Vicencio, S, Tufano, JJ, Earp, J, Venegas, M, and Peñailillo, L. Eccentric cycling is an alternative to Nordic hamstring exercise to increase the neuromuscular function of knee flexors in untrained men. J Strength Cond Res 37(11): 2158-2166, 2023-Nordic hamstring exercise (NHE) has been proposed to reduce knee flexor (KF) injuries. However, submaximal alternatives to NHE are necessary for the clinical or weaker population. The aim of this study was to compare the effects of Nordic hamstring training (NHT) and eccentric cycling (ECC) training on the neuromuscular function of the KF. Twenty healthy men (27.7 ± 3.5 years) were randomly assigned into 2 groups that performed 10 training sessions (2-3 sessions·week-1) of either NHT (n = 10) or ECC (n = 10). Maximal voluntary isometric contraction of the KF and knee extensor (KE) muscles (MVICKF and MVICKE) was measured, and the hamstring/quadriceps strength (H/Q) ratio was calculated. Furthermore, changes in NHE maximum reaction force (NHE-MRFKF), NHE break-point angle (NHE-BPA), and muscle activity of the semitendinosus (STEMG) and biceps femoris (BFEMG) during the NHE after the interventions were compared. Although no group × time effects were observed (p = 0.09-0.70), but time effects were found for all variables. Pairwise comparisons revealed that MVICKF (+16.9%; p = 0.02), H/Q ratio (+11.8%; p = 0.01), NHE-MRFKF (+19.8%; p = 0.005), and NHE-BPA (+30.8%; p = 0.001) increased after ECC, whereas NHE-MRFKF (+9.7%; p = 0.003), NHE-BPA (+35.5%; p = 0.0002), and STEMG (+33.7%; p = 0.02) increased after NHT. A group × time effect was observed (p = 0.003) in BFEMG, revealing an increase only after ECC (+41.1%; p < 0.0001). Similar neuromuscular adaptations were found after both training modalities. Therefore, ECC provides similar adaptations as NHT and may serve as an alternative form of KF training for those unable to perform NHE.
Inconsistencies between sexes in the landing criteria provided by the international gymnastics governing body (FIG) may predispose female gymnasts to lower extremity injury. This study aimed to investigate lower extremity biomechanics when performing the male and female landing strategy. Seven collegiate, female gymnasts (age: 20.5 ± 1.2 years, height: 1.64 ± 0.06 m, mass: 60.4 ± 10.2 kg) performed drop landings using the prescribed women's and men's landing strategy. Kinematic and kinetic data from 10 trials of each landing strategy were collected. Differences between landing strategy at individual and group level for key injury risk variables of the lower limb were explored. Group differences (p ≤ .05) were reported in the sagittal range of motion (ROM) at the knees and hips, with the men's landing strategy eliciting a larger ROM decelerating the body upon impact. Large inter and intra-individual variation was apparent with different movement responses shown across individuals and demonstrating degeneracy as gymnasts satisfied the overall landing objective. These results indicate an individually favoured landing strategy to fulfil the informational constraints and hence supporting the use of a single-subject design. The current study emphasises the potential injury risk associated with the different informational constraints placed on females' landing strategy by the FIG, whilst recognising the individual gymnasts' task response.Highlights An increase in the range of motion at the knee and hip may support the recommendation of the men's landing style.Gymnasts appear to utilise individual landing strategies to complete the landing objective, supporting the use of a single-subject design.
- MeSH
- biomechanika MeSH
- dolní končetina * fyziologie MeSH
- dospělí MeSH
- gymnastika fyziologie MeSH
- kolenní kloub * fyziologie MeSH
- koleno fyziologie MeSH
- lidé MeSH
- mladý dospělý MeSH
- pohyb fyziologie MeSH
- Check Tag
- dospělí MeSH
- lidé MeSH
- mladý dospělý MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
