Title: 100 m hurdle race women in fire sport. Objectives: A description of the discipline of 100 m hurdle race women and a description of rendition technique from the methodical point of view is the main objective of this work. Methods: A descriptive method and a video record analysis were used in this work. Each phases are slowed-motion and retroactive described. Results: It`s a methodical description of the discipline with the video record and it will be used for coaching purposes for beginning and also advanced racers. It will improve technique of 100 m hurdle race and also achieve better sports performances too. Keywords: run, start, hurdle, beam, fire divider, technique, movement, analysis.

The study aimed to identify and understand the phenomenon of group processes comparing two Personal Development (PD) group modalities. One group mainly used verbalisation and the other mainly used movement for interaction and self-expression. Group processes were expressed through the analysis of the participant's non-verbal movements and the verbal expressions of their experience in the group. The thesis of this study was that group processes can be expressed and identified through movement and verbal expressions. This study built on previous studies that have explored group processes in both Dance Movement Psychotherapy (DMP) and in Verbal Group Psychotherapy fields in relation to PD groups. Two theoretical frameworks that underpinned this study were: DMP as group work and Group Psychotherapy with the primary focus on group processes in PD groups. These theories were selected for their pertinence to the understanding of group processes and PD groups. The comparison between the groups intended to answer the study's question: which group processes as expressed verbally and non-verbally in movement can be identified in a dance movement PD group compared with a verbal PD group? Qualitative hermeneutic phenomenology methodology was employed in this study in order to answer the above question using two collection and analysis methods: movement observation using Laban Movement Analysis (LMA) and a thematic analysis of participants' verbal reflections in semi-structured interviews. The findings of the study have shown which group process developed in each of the PD groups identified through the two collections methods. For instance, they were conflict, rivalry, trust, intimacy and cohesion. The analysis of the DM PD group has shown differences in findings between that which the movement observation identified and that which participants described in the interviews. The study aimed to contribute to the body of knowledge regarding group processes in DMP and group psychotherapy theory and research. Exploring group processes through the use of movement and verbalisation adds to the professional development and training in both fields. The study outcome offers an original contribution to practice, through the development of a group work guide for facilitators, derived from the group processes conceptual model. It represents a new way of understanding group processes and dynamics through the observation of a group's movements and verbal reflections by participants. This guide is aimed at supporting facilitators of PD groups when considering interventions both when leading groups and when reflecting on the groups' processes.

Introduction: Aseptic loosening is the most common indication for revision surgery of hipimplants. However, sometimes diagnosis from planar radiography is uncertain, makingdecision regarding revision surgery problematic. Implant Movement Analysis (IMA) is anewly introduced method of analysing uncertain aseptic loosening of hip prostheses. It usescomputer tomography with rotational provocation to expose movement of the implantrelatively to the surrounding bone. Aim: To evaluate the role of IMA as a complementary method to planar radiography indiagnosing aseptic loosening of total hip artroplasty (THA) at Lindesberg Hospital. 1) HasIMA improved diagnosing of uncertain cases of aseptic loosening? 2) Has IMA reduced thenumber of unnecessary THA revision surgeries? Methods: Retrospective cohort study analysing 43 cases of uncertain aseptic looseningexamined with IMA at Lindesberg Hospital. Paired results from planar radiography and IMAwere statistically compared with McNemar’s test, IMA held as the reference. Additional datawas also collected (i.e. age and symptoms). Results: Planar radiography had 70 % sensitivity and 65 % specificity compared to certainresults from IMA. IMA provided diagnoses in 84 % of the cases and changed the diagnosisfor 33 % compared to planar radiography. Eight cases got their diagnosis changed from looseto not loose. Conclusions: IMA has improved diagnosing cases of uncertain aseptic loosening and cantherefore be seen as a good complementary method to planar radiography in these cases.However, as it is a new method further evaluation is needed.

<b>Aims:</b> The overall aim of this research was to increase the knowledge about dystonia by identifying factors that influence self-reported quality of life and health in this disorder and to determine what factors predict disability. A further aim was to develop an objective outcome measure for quantifying the movement dysfunction in cervical dystonia (CD) and evaluate effects of physiotherapy. <b>Methods:</b> A descriptive correlative design was adopted for study I (n=351), with a questionnaire covering physical activity, satisfaction with treatment, physiotherapy or not, and quality of life and health measured with the Craniocervical Dystonia Questionnaire (CDQ-24) and the Cervical Dystonia Impact Profile, respectively. In study II a CD group (n=6) was compared with a control group (n=6). Head movements were measured with a motion capture system, and a Movement Energy Index (MEI) was calculated. In study III an experimental single-case design (n=6) was used, with continuous assessments during pre-treatment, intervention and follow-up. Quality of life, measured with CDQ-24, was the primary outcome measure. A prospective correlative design was applied in study IV (n=179), where data from questionnaires were collected on inclusion and 2 months later. Independent variables were: duration of dystonia, severity of dystonia, pain intensity, catastrophizing, self-efficacy, fatigue, kinesiophobia, depression, anxiety and physical activity; and the dependent variables were the Neck Disability Index and the Functional Disability Questionnaire. <b>Results:</b> Study I indicated that physical activity and satisfaction with treatment were associated with quality of life and health in dystonia. In study II the groups differed significantly concerning MEI in all movement directions. Mean MEI was significantly higher in patients than in controls. Positive treatment outcomes were reported by all patients in study III, mainly with reduced pain and reduced CD severity during the treatment period. Five of the six patients reported increased quality of life at the 6-month follow-up. Perceived self-efficacy, fatigue, pain intensity and anxiety contributed significantly to disability prediction in study IV. <b>Conclusion: </b>These investigations have increased the knowledge of dystonia from a multidimensional perspective and the results could be valuable in developing new treatment strategies.

Aims: The principal aims of this research were 1) to extend existing knowledge of the everyday sit-to-walk (STW) transfer in subjects with stroke and in matched controls by exploring temporal, kinematic, and kinetic aspects, and 2) to investigate the relations between some clinical and laboratory measures of postural control and locomotion in stroke rehabilitation and research. Methods: Ten community-living subjects with stroke (mean age 59 years) and ten matched controls were enrolled in the STW studies (Studies I, II, and IV). In the study regarding relations between clinical and laboratory measures the same samples (part of Study II) and also 20 outpatient subjects with stroke (mean age 50 years) participated (Study III). Data collections were performed in laboratory environments with clinical assessment instruments, video cameras, force plates and a movement analysis system. Results: 1) Study I: A temporal aspect of STW was studied. Four phases were defined. The subjects with stroke used significantly more time during the 2nd STW phase, defined from seat-off to the loading peak of the 1st swing leg. Study II: A movement aspect of STW was investigated. The stroke subjects generated significantly less centre of mass momenta in horizontal and vertical directions, and the momenta peaks occurred significantly earlier than in the controls. Study IV: A force aspect of STW was explored. The subjects with stroke generated significantly larger propulsive impulse beneath the (non-paretic) stance buttock and significantly more braking impulses were exerted by both buttocks and particularly by the stance foot. 2) Part of Study II: A strong correlation was found between the clinical measure Fluidity Scale and the laboratory measure Fluidity Index. Study III: Moderate correlations were shown between Berg Balance Scale, ratings of weight distribution during quiet stance, and force measures. Conclusions: The findings of the STW studies show a changed force interaction between the lower extremities post-stroke, likely influencing movement patterns and temporal characteristics of the everyday transfer. The results are considered to reflect compensatory motor strategies. The results of the studies on relations between some clinical and laboratory measures indicate that the strength of the relation is multidimensional.

When top sports performers fail or “choke” under pressure, everyone asks: why? Research has identified a number of conditions (e.g. an audience) that elicit choking and that moderate (e.g. trait-anxiety) pressure – performance relation. Furthermore, mediating processes have been investigated. For example, explicit monitoring theories link performance failure under psychological stress to an increase in attention paid to a skill and its step-by-step execution (Beilock & Carr, 2001). Many studies have provided support for these ideas. However, so far only overt performance measures have been investigated which do not allow more thorough analyses of processes or performance strategies. But also a theoretical framework has been missing, that could (a) explain the effects of explicit monitoring on skill execution and that (b) makes predictions as to what is being monitored during execution. Consequently in this study, the nodalpoint hypothesis of motor control (Hossner & Ehrlenspiel, 2006) was taken to predict movement changes on three levels of analysis at certain “nodalpoints” within the movement sequence. Performance in two different laboratory tasks was assessed with respect to overt performance (the observable result, for example accuracy in the target), covert performance (description of movement execution, for example the acceleration of body segements) and task exploitation (the utilization of task properties such as covariation). A fake competition (see Beilock & Carr, 2002) was used to invoke pressure. In study 1 a ball bouncing task in a virtual-reality set-up was chosen. Previous studies (de Rugy, Wei, Müller, & Sternad, 2003) have shown that learners are usually able to “passively” exploit the dynamical stability of the system. According to explicit monitoring theories, choking should be expected either if the task itself evokes an “active control” (Experiment 1) or if learners are provided with explicit instructions (Experiment 2). In both experiments, participants first went through a practice phase on day 1. On day 2, following the Baseline Test participants were divided into a High-Stress or No-Stress Group for the final Performance Test. The High-Stress Group entered a fake competition. Overt performance was measured by the Absolute Error (AE) of ball amplitudes from target height; covert performance was measured by Period Modulation between successive hits and task exploitation was measured by Acceleration (AC) at ball-racket impact and Covariation (COV) of impact parameters. To evoke active control in Exp. 1 (N=20), perturbations to the ball flight were introduced. In Exp. 2 (N=39) half of the participants received explicit skill-focused instructions during learning. For overt performance, results generally show an interaction between Stress Group and Test, with better performance (i. e. lower AE) for the High-Stress group in the final Performance Test. This effect is also independent of the Instructions that participants had received during learning (Exp. 2). Similar effects were found for COV but not for AC. In study 2 a visuomotor tracking task in which participants had to pursuit a target cross that was moving on an invisible curve. This curve consisted of 3 segments of 6 turning points sequentially ordered around the x-axis. Participants learned two short movement sequences which were then concatenated to form a single sequence. It was expected that under pressure, this sequence should “fall apart” at the point of concatenation. Overt Performance was assessed by the Root Mean Square Error between target and pursuit cross as well as the Absolute Error at the turning points, covert performance was measured by the Latency from target to pursuit turning and task exploitation was measured by the temporal covariation between successive intervals between turning points. Experiment 3 (intraindividual variation) as well as Experiment 4 (interindividual variation) show performance enhancement in the pressure situation on the overt level with matching results on covert and task exploitation level. Thus, contrary to previous studies, no choking under pressure was found in any of the experiments. This may be interpreted as a failure in the experimental manipulation. But certainly also important characteristics of the task are highlighted. Choking should occur in tasks where performers do not have the time to use action or thought control strategies, that are more relevant to their “self” and that are discrete in nature. / Wenn Top-Athleten im Wettkampf versagen fragt sich jeder: warum? Die Forschung hat dazu einerseits Bedingungen identifiziert (z.B. die Anwesenheit von Publikum), die „Versagen“ auslösen und die Beziehung Druck- Leistung moderieren. Zudem wurden vermittelnde Prozesse gefunden wie zum Beispiel die bewusste Aufmerksamkeitsfokussierung („explicit monitoring“) auf die Ausführung der Bewegung (Beilock & Carr, 2001). Obwohl es gerade für diese Vorstellungen einige Befunde gibt, wurde bislang fast ausschließlich das Bewegungsresultat („overt performance“) untersucht, nicht aber Variablen, die Aussagen über die Bewegungsausführung zulassen. Zudem fehlt ein theoretischer Rahmen, der Vorhersagen zulässt darüber, (a) welche Veränderungen der Bewegungsausführung unter Druck zu erwarten sind und (b) welchen Stellen der Bewegung bewusst fokussiert werden. Darum wurde für diese Studie die „Knotenpunkthypothese motorischer Kontrolle“ (Hossner & Ehrlenspiel, 2006) herangezogen um auf drei Analyse-Ebenen zu ermöglichen Vorhersagen an Knotenpunkten der Bewegung zu treffen. Leistung wurde entsprechend auf einer overt-Ebene (beobachtbare Bewegungsresultat, z.B. Treffgenauigkeit), einer covert-Ebene (z.B. raum-zeitliche Verlaufe von Gelenkwinkeln) und einer task-exploitation-Ebene (z.B. die Covariation von Ausführungsparametern) untersucht. Für die Manipulation einer „Druck-Bedingung“ wurde ein Pseudowettkampf (nach Beilock & Carr, 2002) verwendet. Für die Experimente 1 und 2 wurde eine semi-virtueller „ball bouncing“-Aufgabe verwendet, für die sich gezeigt hat (de Rugy, Wei, Müller, & Sternad, 2003), dass Lernende tatsächlich in der Lage sind, die dynamische Stabilität der Aufgabe zunehmend auszunutzen. Angenommen wurde, dass Versagen unter Druck erscheinen sollte, wenn die Aufgabe entweder eine „aktive Kontrolle“ verlangt (Experiment 1) oder aber die Lernenden explizite Instruktionen während der Lernphase erhalten. Allerdings zeigen die Ergebnisse beider Experimente nur Leistungsverbesserungen unter Druck-Bedingungen auf overt-Ebene, die mit entsprechenden Verbesserungen auf covefrt- und task-exploitation-Ebene einhergehen. Für die Experimente 3 und 4 wurde eine visuomotorische Tracking-Aufgabe verwendet in der die Probanden zunächst zwei kleinere Bewegungssequenzen erlernten, bevor diese zu einer großen Sequenz verbunden wurde. Unter Druck sollte diese Gesamtsequenz „auseinander brechen“. Jedoch zeigt sich auch hier in beiden Experimenten eine Resultatsverbesserung unter Druck (gegenüber Kontrollbedingungen bzw. –gruppen) auf overt wie auf covert-Ebene. Im Gegensatz zu vielen vorangehenden Studien zeigte sich kein „Choking under Pressure“. Sicherlich stellt sich zunächst die Frage nach der Validität der Druckmanipulation, die aber zumindest für die beiden ersten Experimente gesichert scheint. Relevanter scheint demnach eine Inspektion der Aufgabe. Hier dürfte es sein, dass diskrete Aufgaben, die einen Einsatz von Handlungskontroll-Strategien nicht erlauben und die von größerer „Selbst“-Relevanz sind, eher unter Druck beeinträchtigt werden.

<p>At every joint there is a redundant set of muscle activated during movement or loading of the system. Optimization techniques are needed to evaluate individual forces in every muscle. The objective in this thesis was to use static optimization techniques to calculate individual muscle forces in the human extremities.</p><p>A cost function based on a performance criterion of the involved muscular forces was set to be minimized together with constraints on the muscle forces, restraining negative and excessive values. Load-sharing, load capacity and optimal forces of a system can be evaluated, based on a description of the muscle architectural properties, such as moment arm, physiological cross-sectional area, and peak isometric force.</p><p>The upper and lower extremities were modelled in two separate studies. The upper extremity was modelled as a two link-segment with fixed configurations. Load-sharing properties in a simplified model were analyzed. In a more complex model of the elbow and shoulder joint system of muscular forces, the overall total loading capacity was evaluated.</p><p>A lower limb model was then used and optimal forces during gait were evaluated. Gait analysis was performed with simultaneous electromyography (EMG). Gait kinematics and kinetics were used in the static optimization to evaluate of optimal individual muscle forces. EMG recordings measure muscle activation. The raw EMG data was processed and a linear envelope of the signal was used to view the activation profile. A method described as the EMG-to-force method which scales and transforms subject specific EMG data is used to compare the evaluated optimal forces.</p><p>Reasonably good correlation between calculated muscle forces from static optimization and EMG profiles was shown. Also, the possibility to view load-sharing properties of a musculoskeletal system demonstrate a promising complement to traditional motion analysis techniques. However, validation of the accurate muscular forces are needed but not possible.</p><p>Future work is focused on adding more accurate settings in the muscle architectural properties such as moment arms and physiological cross-sectional areas. Further perspectives with this mathematic modelling technique include analyzing pathological movement, such as cerebral palsy and rheumatoid arthritis where muscular weakness, pain and joint deformities are common. In these, better understanding of muscular action and function are needed for better treatment.</p>

Study Design: Methodological study. Objectives: To examine the agreement and validity of using observational risk screening guidelines to evaluate ACL injury risk factors. Background: Post-pubescent females have an increased risk of anterior cruciate ligament (ACL) injury compared with their male counterparts partly due to their high-risk landing and cutting strategies. There are currently no scientifically-tested methods to screen for these high risk strategies in the clinic or on the field. Methods and Measures: Three physiotherapists used observational risk screening guidelines to rate the neuromuscular characteristics of 40 adolescent female soccer players. Drop jumps were rated as high risk or low risk based on the degree of knee abduction. Side hops and side cuts were rated on the degree of lower limb 'reaching'. Ratings were evaluated for intrarater and interrater agreement using kappa coefficients. 3D motion analysis was used as a gold standard for determining the validity of ratings. Results: Acceptable intrarater and interrater agreement (k≥0.61) were attained for the drop jump and the side hop, with kappa coefficients ranging from 0.64 to 0.94. Acceptable sensitivity (≥0.80) was attained for the side hop and the side cut, with values ranging from 0.88 to 1.00. Acceptable specificity (≥0.50) was attained for the drop jump, with values ranging from 0.64 to 0.72. Conclusion: Observational risk screening is a practical and cost-effective method of screening for ACL injury risk. Based on levels of agreement and sensitivity, the side hop appears to be a suitable screening task. Agreement was acceptable for the drop jump but its validity needs further investigation.

Study Design: Methodological study. Objectives: To examine the agreement and validity of using observational risk screening guidelines to evaluate ACL injury risk factors. Background: Post-pubescent females have an increased risk of anterior cruciate ligament (ACL) injury compared with their male counterparts partly due to their high-risk landing and cutting strategies. There are currently no scientifically-tested methods to screen for these high risk strategies in the clinic or on the field. Methods and Measures: Three physiotherapists used observational risk screening guidelines to rate the neuromuscular characteristics of 40 adolescent female soccer players. Drop jumps were rated as high risk or low risk based on the degree of knee abduction. Side hops and side cuts were rated on the degree of lower limb 'reaching'. Ratings were evaluated for intrarater and interrater agreement using kappa coefficients. 3D motion analysis was used as a gold standard for determining the validity of ratings. Results: Acceptable intrarater and interrater agreement (k≥0.61) were attained for the drop jump and the side hop, with kappa coefficients ranging from 0.64 to 0.94. Acceptable sensitivity (≥0.80) was attained for the side hop and the side cut, with values ranging from 0.88 to 1.00. Acceptable specificity (≥0.50) was attained for the drop jump, with values ranging from 0.64 to 0.72. Conclusion: Observational risk screening is a practical and cost-effective method of screening for ACL injury risk. Based on levels of agreement and sensitivity, the side hop appears to be a suitable screening task. Agreement was acceptable for the drop jump but its validity needs further investigation.

Bakgrund: Personer som opererats för godartad lillhjärnstumör när de var barn upplever sig ha balansproblem och förekomst av lätt balansnedsättning har rapporterats. I en pågående uppföljningsstudie vid Akademiska sjukhuset undersöks bl.a. balansen i denna patientgrupp. Syfte: … att i en delstudie med kontrollpersoner beskriva och jämföra balansförmågan vid genomförande av Mini-BESTest med fokus på Timed-Up-and-Go (TUG) och TUG_kognitiv. Metod: Tvärsnittsstudie. Elva personer 19-33 år rekryterades. Deltagarna utförde Mini-BESTest med rörelseanalyssystemet MoLab. Beroende variabler var poäng på MiniBESTest, absolut och relativ tid för TUG-faser samt balansvariabeln trunk sway velocity. Resultat: Medianvärdet för Mini-BESTest var 31 (Q1-Q3=29-31). En skillnad på 17,3%  framkom för den totala tiden mellan TUG och TUG_kognitiv. Signifikanta skillnader mellan balansuppgifterna påvisades för total absolut tid (p = 0,003), fas 2 (p = 0,013) och fas 3 (p = 0,021). För balansvariabeln trunk sway velocity i antero-/posterior riktning framkom signifikanta skillnader för fas 2 (p=0,008), fas 3 (p=0,010) och fas 4 (p = 0,05), medio-/lateralt en signifikant skillnad för fas 2 (p = 0,03). Konklusion: Denna studie visade att friska unga vuxna får en påverkan på balansen när de samtidigt utför en kognitiv uppgift. Resultatet går inte att generalisera till en större population utan gäller för de undersökta deltagarna / Background: People treated for benign cerebellar tumor during childhood experience balance problems and studies report presence of mild balance impairment. In an ongoing follow-up study at the University Hospital in Uppsala balance in this patient group is being investigated. Objective: ... in a sub-study with control persons describe and compare balance performance of Mini-BESTest focusing on Timed-Up-and-Go (TUG) and TUG_cognitive. Methods: Cross-sectional study. Eleven people 19-33 years were recruited. The participants performed the Mini-BESTest with the MoLab motion analysis system. Dependent variables were points on MiniBESTest, absolute and relative time for TUG-phases, and the balance variable trunk sway velocity. Results: Median value for Mini-BESTest was 31 (Q1-Q3 = 29-31). A difference of 17.3% was shown for total time between TUG and TUG_cognitive. Significant differences between the balance tests were shown for total absolute time (p = 0.003), phase 2 (p = 0.013) and phase 3 (p = 0.021). For trunk sway velocity in the antero-/posterior direction, significant differences were shown for phase 2 (p = 0.008), phase 3 (p = 0.010) and phase 4 (p = 0.05), medio-/laterally  significant difference for phase 2 (p = 0.03). Conclusion: This study demonstrated that healthy young adults have an impact on balance when they simultaneously perform a cognitive task. The result cannot be generalized to a larger population, but applies to the participants investigated.