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  • Oslo Sports Trauma Research Center - 056 - Prevention of hamstrings strains in football
    games no evidence based methods exist to prevent these injuries The aim of this study is to investigate whether the number and severity of hamstring strains can be reduced with an exercise program based on strength and flexibility training for the hamstring muscles A strength training exercise Nordic hamstring was developed where the emphasis is on eccentric component i e where the muscle develops force while lengthening Participants Male soccer players from 16 of 20 teams in the Icelandic elite and first divisions and players from all teams 14 in the Norwegian elite division Tippeliga a total of about 600 players Method The study lasts for three years 2000 2001 and 2002 In the 2000 season the medical staff for each team prospectively registered injuries that caused time loss from match or training For each injury the following factors were registered Date of injury activity type of match type of training when during a match or training the injury occurred player position when the injury occurred location and type of injury severity and exact diagnosis The coaches registered player exposure training and match program Before the 2001 season an intervention program was developed consisting of three exercises One stretching exercise to be performed in warm up before all training sessions and matches a flexibility training program to be performed 3 times per week in the preseason preparatory period and 2 times per week during the season and a strength training exercise program with a large eccentric component Nordic hamstring to be performed 3 times per week in the preseason preparatory period and 2 times per week during the season In the 2001 season the Icelandic teams used to perform all three exercises while the Norwegian teams where asked to just use the stretching and flexibility exercises but not the strength

    Original URL path: http://www.klokavskade.no/en/Project/056---Prevention-of-hamstrings-strains-in-football-/ (2015-09-15)
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  • Oslo Sports Trauma Research Center - 093 - Alpine collision injuries - a 6-year injury registration
    has been seen as a result of more skiers in the slopes The introduction of snowboarders in the alpine slopes were thought by many to be a hazard regarding collision injuries The aim of our study was to investigate the relationship between collision injuries and type of equipment and calculate the incidence rate per 100 injuries IR Data from the Injury Register at Oppland Central Hospital Lillehammer OCHL were used Injuries from the six year period from the winter season 1995 to 2000 were included In this period 4692 17 7 of 26547 injuries were skiing injuries cross country and ski jump included Results In alpine skiing 1632 skiers were injured 233 because of a collision IR 14 7 95 CI 12 6 to 16 2 In telemark skiing 22 collisions in 166 injuries IR 13 3 95 CI 8 7 to 20 1 In snowboarding 66 collisions in 922 injuries IR 7 2 95 CI 5 6 to 9 1 This shows a significant lower rate of being injured because of a collision when snowboarding compared to alpine skiing From our earlier studies on skiing injuries we know that snowboarders have a three to four times higher risk of

    Original URL path: http://www.klokavskade.no/en/Project/093---Alpine-collision-injuries---a-6-year-injury-registration-/ (2015-09-15)
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  • Oslo Sports Trauma Research Center - 023 - A new method for strength and power testing used for monitoring rehabilitation, performance and training
    multi function measuring device the Musclelab apparatus has recently been developed to measure velocity force and power during dynamic muscle action Since measurements can be done using free weights or dynamic strength training equipment for most muscle groups it may be assumed that the relation to sport performance is closer than what is reported for other strength testing instruments The aim of this study was to determine the reproducibility of velocity force and power measurements during a dynamic squat as well as various jump tests Methods Forty eight subjects 14 elite athletes 12 trained and 22 sedate subjects were tested three days in a row The first test session was a familiarization session where one repetition maximum 1 RM in a 90 degree squat was determined In the two final test sessions the subjects performed concentric squats with loads of 15 30 45 60 75 and 90 of their individual 1 RM Velocity force and power were measured using the accelerometer or linear encoder of the Musclelab device The subjects also performed standing vertical jumps SJ counter movement jumps CMJ and standing jumps with a load of 50 of their body weight SJ50 Jump height was determined from flight time

    Original URL path: http://www.klokavskade.no/en/Project/A-new-method-for-strength-and-power-testing-used-for-monitoring-rehabilitation-performance-and-training-/ (2015-09-15)
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  • Oslo Sports Trauma Research Center - 115 - Risk factors for Achilles tendon rupture and postoperative problems
    Although it is recommended operatively treatment of this injury the literature shows a high variation in the numbers of postoperative problems after an Achilles tendon rupture Especially there seems to be fewer problems in the American studies on this issue Local anesthesia is far more common in Scandinavia than USA and this might one explanation It could be hypothesized that local anesthesia make it more difficult to get a close approximation of rupture tendon because the calf muscles are still in tension during the operative procedure It could be also be due to a difference in postoperative rehabilitation A rehabilitation program which uses eccentric muscle work might reduce the number with postoperative problems and reduce the observed risk of the contra lateral side The following studies are under preparation 1 Randomized study on local versus spinal anesthesia with Achilles tendon rupture 2 Randomized study on eccentric only on injured side or bilaterally after Achilles tendon rupture treated operatively Results All patients n 168 treated operatively from August 1990 to April 1997 at Akershus University hospital were contacted August 1998 Ten patients 6 had experienced a rupture on the contralateral side during the follow up period OR 186 96 362 vs

    Original URL path: http://www.klokavskade.no/en/Project/115---Risk-factors-for-Achilles-tendon-rupture-and-postoperative-problems-/ (2015-09-15)
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  • Oslo Sports Trauma Research Center - 036 - Prevalence of low back pain among cross-country skiers, rowers, orienteerers and sedentary controls - A cross-sectional study
    the prevalence of low back pain may be very high among cross country skiers even to the extent where it could be called an occupational disease Whether this is the case is not known although the only available study from cross country skiing has shown that the low back is the most frequently injured body region among young elite skiers among men and women Eriksson 1996 Cross country skiers use different techniques and it has been suggested that the loads imposed by both double poling and skating may cause low back pain Thus the purpose of this investigation is to compare the prevalence of low back pain between elite athletes from cross country skiing orienteering and rowing as well as a control group of non athletes The reason for choosing athletes from these sports to compare with is that they are expected to have a comparable training volume and that their sports do rowing and do not orienteering subject the athletes to specific low back loading Methods A cross sectional study of the prevalence of low back pain will be conducted among participants aged 18 years or older in the Norwegian championships in cross country skiing winter 2000 rowing summer 2000 and orienteering fall 2000 We expect to contact about 150 athletes of each gender in both sports The respective sports federations will be contacted to ensure that all participants are informed of the purposes and procedures of the investigation upon entry in the championships In addition athletes who have been part of teams participating in the championships since Jan 1 2000 but failed to participate due to injury illness or other reasons will be identified by their coaches and contacted for participation These athletes as well as an age and sex matched control group not participating in competitive sports

    Original URL path: http://www.klokavskade.no/en/Project/036---Prevalence-of-low-back-pain-among-cross-country-skiers-rowers-orienteerers-and-sedentary-controls---A-cross-sectional-study/ (2015-09-15)
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  • Oslo Sports Trauma Research Center - 070 - Articular cartilage lesions of the knee - a prospective arthroscopic study
    pain and reduced function in the affected joint This injury is associated with anterior cruciate ligament tear and meniscal injury though also as an isolated injury It is an estimated considerable risk for degenerative changes of knee due to the fact cartilage tissue is not able to selfrepair Existing treatment is not well documented in randomized studies and means a prolonged and demanding rehabilitation and is rather expensive A thoroughly evaluation of the published nonrandomized series are not possible due to the fact that the magnitude and incidence of this injury is not documented This study will map the incidence of cartilage defects of the knee diagnosed at knee arthroscopy during a six months prospective registration of cartilage injury at three hospitals Central hospital of Akershus Martina Hansen Hospital Ullevål Hospital here in Oslo serving primary care for about 500 000 inhabitants Symptoms and findings will be registered at the international ICRS form for cartilage injury Patients with a full thickness cartilage defect will be followed with clinical reexamination at five and ten years The results from this study will be 1 Incidence and symptoms related to cartilage defects of the knee will be documented 2 Natural history of a

    Original URL path: http://www.klokavskade.no/en/Project/070---Articular-cartilage-lesions-of-the-knee---a-prospective-arthroscopic-study--/ (2015-09-15)
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  • Oslo Sports Trauma Research Center - 051 - Prevention of injuries in soccer through increased awarenes of injury situations
    16 of 20 soccer teams in the Icelandic elite soccer league and the 1st division totally round 300 players Method The Icelandic soccer season lasts from Mai 20th to September 20th 2000 During that time video recordings from most of the matches in the Icelandic elite soccer league and the last rounds in the cup are available at the Sports Department of the Icelandic National Broadcasting Service Television appr 90 matches Match analysis from the 1999 season showed three mechanisms leading to 54 53 of 102 analyzed incidents a Breake down attacks attention on ball tackling from side 21 6 b Defense tackling duels attention on ball or poor technique 20 6 c Heading duels attention on ball or high elbows 10 8 Before the season starts 8 teams 4 from elite league and 4 from 1st division were visited with interventions program based on the principle of guided discovery focusing on incidents from these 3 mechanisms Oral presentation of 20 minutes was given followed by a 40 minutes videotape presentation compound of 12 incidents 4 from each mechanism The players gave a written analyze of each incident and made a proposal how the exposed player could prevent the situation The other teams will be used as a control All videotapes from matches will be reviewed by the same physical therapist An incident was recorded if the match was interrupted by the referee a player lay down for more than 15 sec and the player appeared to be in pain These incidents and the events leading up to the incidents were transferred to master videotape to further analysis Injuries were defined as incidents forcing the player to leave the field because of an injury or he can not participate in match or practice next day The master videotape was analyzed

    Original URL path: http://www.klokavskade.no/en/Project/051---Prevention-of-injuries-in-soccer-through-increased-awarenes-of-injury-situations-/ (2015-09-15)
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  • Oslo Sports Trauma Research Center - 020 - The effect of a center line rule change on the incidence of ankle sprains and rule violations in women's collegiate volleyball
    completely over the line as long as there was no interference with the opposing team However this rule change was stopped for fear of more injuries An alternative rule was designed to eliminate the dangerous situations and still keep the number rallies that were stopped because of center line rule violations to a minimum The NAGWS which apply to women s collegiate volleyball in the United States adopted in 1998 a more liberal center line rule which it seems may fulfill these objectives The NAGWS rule allows complete encroachment into the opponent s court by hands feet as long as 1 there is no safety hazard 2 there is no contact with the opponent and 3 the distance of the encroachment is not significant A safety hazard was said to exist anytime an opponent or teammate is jumping nearby i e that center line violation will be called Based on data from the NCAA Injury Surveillance System ISS for the 1997 98 seasons before the rule change and the 1999 2000 seasons after the rule change we set out to assess whether the rule change had any effect on the incidence of ankle sprains Results Ankle injuries have been the leading volleyball related injury reported by the ISS in each season since 1984 The average incidence of ankle sprains during the four year study period from 1996 to 1999 was 1 48 0 24 per 1000 athlete exposures AE training sessions or games However there was no significant change in the rate of game related ankle injuries occurring during the two seasons before 1996 1997 1 54 0 25 sprains per 100 AE and after the rule change 1998 1999 1 42 0 20 sprains per 1000 AE p 0 55 Ideally rules governing athletic contests should function to create

    Original URL path: http://www.klokavskade.no/en/Project/020---The-effect-of-a-center-line-rule-change-on-the-incidence-of-ankle-sprains-and-rule-violations-in-womens-collegiate-volleyball-/ (2015-09-15)
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