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- Alfredson, Håkan, et al.
(författare)
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No normalisation of the tendon structure and thickness after intratendinous surgery for chronic painful midportion Achilles tendinosis.
- 2009
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Ingår i: British journal of sports medicine. - : BMJ. - 1473-0480 .- 0306-3674. ; 43:12, s. 948-9
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVE: To characterise Achilles tendon structure and thickness a minimum of 8 years after intra-tendinous surgery. Material and METHODS: Fourteen patients (16 tendons; 9 men and 5 women, mean age 43 years, range 27-55) surgically treated (intra-tendinous surgery) for chronic painful midportion Achilles tendinosis, were followed with clinical examination and grey-scale ultrasonography for a minimum of 8 years (range 8-16 years, mean 13 years). RESULTS: All patients were satisfied with the result of surgery and were active in Achilles tendon loading activities without restrictions. In all operated tendons, structural abnormalities remained and tendons remained thicker than normal tendons. CONCLUSIONS: Resection of tendinosis is associated with persistent structural abnormalities and thickening of the tendon 13 years after surgery, despite successful clinical outcomes.
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- Fahlén, Josef, 1974-
(författare)
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Structures beyond the frameworks of the rink : On organization in Swedish ice hockey
- 2006
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- This is a dissertation on organization in Swedish ice hockey based on four articles. The purpose of the thesis is to contribute knowledge on the direction, management and practice of sport using Swedish elite ice hockey as an example. Knowledge is created by examining four separate but mutually contingent aspects of organizations. Article I contributes to the overall purpose with knowledge on the professionalization of Swedish ice hockey, the reasons behind and the consequences of it. Focusing on the timeframe 1967-2000 the article highlights how norms, values and ideals changed over time and contributed to a change from ice hockey as an amateur sport based on idealistic motives and volunteer efforts to a professional sport based on entertainment and commercial forces. Article II contributes knowledge on the structural organization of Swedish elite ice hockey clubs and contributing factors. The article compares eleven elite ice hockey clubs and shows how they vary in relation to each other from low to high specialization, standardization and centralization but also how they present many similar characteristics such as organizational form, subsidiary businesses, cooperation with farm clubs and upper secondary schools, types of employments and division of workload. Article III contributes with knowledge on how organizational structures are experienced by individuals working or volunteering in the clubs. Comparing experiences in two structurally different clubs, the article shows how more developed structures are experienced more positively than less developed structures are. However, both groups agree that more developed structures are desirable and they also have similar opinions on issues concerning formal education and training, the elite program vs. the youth program, strategic vs. operative tasks and personal freedom. Article IV contributes knowledge on how experiences of mentioned structures are affected by remuneration, authority and centrality. Exploring four positions differing from each other with regard to hierarchical position, distance to the club’s core activities and payment, the article shows that individual experiences of organizational structure vary depending on where in the club the individual works. This variation is shown to result in tensions between the different positions. The knowledge offered in the thesis is based on three data collections. Data have been gathered from official and unofficial documentation from and on the Swedish sports confederation, the Swedish ice hockey association and 11 clubs represented in the highest division 2000/2001, and from individuals working or volunteering in these clubs as board members, general managers, marketing assistants, coaches, volunteers in the youth programs and arena personnel. The studies are carried out within an institutional theory framework and the analysis of the results taken together shows how the structures in elite ice hockey clubs are affected by surrounding environment and societal environments. Norms and ideals concerning legitimate ways of organizing are mediated by authorities, educational establishments, trade organizations and successful models in neighbouring industries. These norms and ideals have changed as new actors such as television networks, commercial sponsors and employed staff have entered ice hockey and as the roles of the government, the associations, the coaches and the players have changed. These ongoing changes are combining to a new context and new circumstances for the direction, management and practice of Swedish ice hockey.
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- Flodgren, Gerd, 1961-, et al.
(författare)
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Changes in interstitial noradrenaline, trapezius muscle activity and oxygen saturation during low-load work and recovery
- 2009
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Ingår i: European Journal of Applied Physiology. - : Springer Science and Business Media LLC. - 1439-6319 .- 1439-6327. ; 107:1, s. 31-42
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Tidskriftsartikel (refereegranskat)abstract
- Both physical as well as mental demands result in an increased activity in the sympathetic nervous system (SNS) with changes in blood-pressure and heart-rate. Through local release of catecholamines, e.g. noradrenaline (NAd) SNS exerts various actions at the muscle level. The aims of this study were to investigate the effects of low-load repetitive work alone and in combination with mental demands on local muscle interstitial noradrenaline concentration [NAd]i, muscle activity and oxygenation, assessed with microdialysis, surface electromyography, and near-infrared spectroscopy, respectively. Healthy females (n = 15) were exposed to (1) 30 min repetitive work (RW) and (2) 30 min repetitive work with superimposed mental load (RWML) on two different occasions. Muscle [NAd]i and muscle activity increased significantly in response to RW, but did not increase further during RWML. For RW, [NAd]i was found to be inversely correlated to muscle activity. Oxygenation decreased significantly during work, independently of occasion. Our findings indicate that low-load work causes significantly increased trapezius muscle [NAd]i in healthy females, and short periods of superimposed mental load do not add to this increase and further, that both muscle activity and oxygenation were unaffected by the superimposed mental load.
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| 13. |
- Willberg, Lotta, et al.
(författare)
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Sclerosing injections to treat midportion Achilles tendinosis : a randomised controlled study evaluating two different concentrations of Polidocanol.
- 2008
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Ingår i: Knee Surgery, Sports Traumatology, Arthroscopy. - : Springer. - 0942-2056 .- 1433-7347. ; 16:9, s. 859-864
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Tidskriftsartikel (refereegranskat)abstract
- Two to three ultrasound (US) and colour Doppler (CD)-guided injections of the sclerosing substance Polidocanol (5 mg/ml) have been demonstrated to give good clinical results in patients with chronic midportion Achilles tendinopathy. This study aimed to investigate if a higher concentration of Polidocanol (10 mg/ml) would lead to a less number of treatments, and lower volumes, needed for good clinical results. Fifty-two consecutive Achilles tendons (48 patients, mean age 49.6 years) with chronic painful midportion Achilles tendinopathy, were randomised to treatment with Polidocanol 5 mg/ml (group A) or 10 mg/ml (group B). The patients and treating physician were blinded to the concentration of Polidocanol injected. All patients had structural tendon changes and neovascularisation in the Achilles midportion. Treatment was US + CD-guided injections targeting the region with neovascularisation (outside ventral tendon). A maximum of three treatments (6-8 weeks in between) were given before evaluation. Patients not satisfied after three treatments were given additional treatment with Polidocanol 10 mg/ml, up to five treatments. For evaluation, the patients recorded the severity of Achilles tendon pain during activity on a visual analogue scale (VAS), before and after treatment. Patient satisfaction with treatment was also assessed. At follow-up (mean 14 months) after three treatments, 18/26 patients in group A and 19/26 patients in group B were satisfied with the treatment and had a significantly reduced level of tendon pain (P < 0.05). After completion of the study, additional treatments with Polidocanol 10 mg/ml in the not satisfied patients resulted in 26/26 satisfied patients in both groups A and B. In summary, we found no significant differences in the number of satisfied patients, number of injections or volumes given, between patients treated with 5 or 10 mg/ml Polidocanol.
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| 14. |
- Zeisig, Eva, 1962-, et al.
(författare)
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Pain relief after intratendinous injections in patients with tennis elbow : results of a randomised study
- 2008
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Ingår i: British Journal of Sports Medicine. - : BMJ. - 0306-3674 .- 1473-0480. ; 42:4, s. 267-271
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Tidskriftsartikel (refereegranskat)abstract
- “Tennis elbow” is a difficult condition to treat. Ultrasonography (US) and colour Doppler (CD) guided injections with polidocanol targeting the area with increased blood flow in the extensor origin have shown promising clinical results.Objective:To evaluate and compare effects of US and CD guided intratendinous injections with sclerosing polidocanol and a local anaesthetic (lidocaine + epinephrine), in patients with tennis elbow.Design:Prospective, randomised, controlled, double-blind, crossover study.Setting:Sports Medicine Unit, Umeå University.Patients:32 patients (36 elbows), age range 27 to 66 years, with a long duration of elbow pain diagnosed as tennis elbow, were included in the study. All patients were followed up 3 and 12 months after treatment. Two patients were excluded due to other interventions during the study.Interventions:One US and CD guided injection with the sclerosing agent polidocanol (group 1) or the local anaesthetic lidocaine plus epinephrine (group 2). At the 3 month follow-up, additional injections with polidocanol were offered to both groups (crossover for group 2).Main outcome measures:Satisfaction with treatment (Yes/No), elbow pain during activity (visual analogue scale), and maximum voluntary grip strength.Results:There were no significant (p<0.05) differences in the outcome between group 1 and group 2. In both groups, there was a significantly lower VAS at the 3-month and 12-month follow-ups, and grip strength was significantly higher at the 12-month follow-up.Conclusions:US and CD guided intratendinous injections gave pain relief in patients with tennis elbow. Polidocanol and lidocaine plus epinephrine injections gave similar results.
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