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- Alricsson, Marie, et al.
(författare)
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Mobility, muscular strength and endurance in the cervical spine in Swedish air force pilots
- 2001
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Ingår i: Aviation, Space and Environmental Medicine. - 0095-6562 .- 1943-4448. ; 72:4, s. 336-342
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Tidskriftsartikel (refereegranskat)abstract
- PURPOSE: Muscle strength, endurance and range of movement of the cervical spine in a group of Swedish Air Force jet pilots (AF) and in a reference group of conscripts doing their military service (RG) were compared. METHODS: We tested 30 (AF) 24-42 yr and 33 (RG) 19-22 yr. A questionnaire was used to document complaints. Maximum voluntary isometric muscle strength of the flexor and extensor muscles of the cervical spine and sub-maximum isometric endurance in the flexor and extensor muscles were measured. RESULTS: Eleven AF (37%) and four RG (12%) had experienced discomfort in the neck within the previous year. The pilots' flexor and extensor muscle strength (47 Nm and 65 Nm) was superior to that of the conscripts (36 Nm and 59 Nm) (p = 0.0001, p = < 0.05, respectively). However, the RG group had greater isometric endurance in the flexor muscles than AF (p = < 0.05) and greater neck rotation (p = <0.005). There was no difference between the two groups in the other variables. CONCLUSION: Differences between the groups with regard to muscle strength and endurance might depend on variations in work-related physical muscle strain, and/or differences in fiber composition in the muscles, which might be reflected by pilot selection procedures.
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| 2. |
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| 3. |
- Alricsson, Marie, et al.
(författare)
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Reliability of sports related functional tests with emphasis on speed and agility in young athletes.
- 2001
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Ingår i: Scandinavian Journal of Medicine and Science in Sports. - : Wiley. - 0905-7188 .- 1600-0838. ; 11:4, s. 229-232
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Tidskriftsartikel (refereegranskat)abstract
- The aim of the present investigation was to test the reliability of two sports related functional tests, a speed test (slalom-test) and an agility test (hurdle-test). Eleven athletes aged 11 years (8 boys, 3 girls) participated voluntarily in the study. All subjects completed four different test sessions for both the slalom-test and the hurdle-test using six standard track hurdles placed at 2-m intervals along a 12-m length of track. There were no significant differences between testing sessions for either the slalom-test (P=0.99) or the hurdle-test (P=0.96), showing no systematic variation between test times. The intraclass correlation coefficients were 0.96 and 0.90 respectively, indicating a good reliability. We conclude that the slalom-test and the hurdle-test are reliable sports related functional tests for measuring speed and agility in groups of young athletic individuals.
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| 4. |
- Alricsson, Marie, et al.
(författare)
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Self-related health, physical activity and complaints in Swedish high school students
- 2006
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Ingår i: Scientific World Journal. - : Hindawi Limited. - 1537-744X. ; 6, s. 816-826
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Tidskriftsartikel (refereegranskat)abstract
- The aim of this investigation was to study self-related health, physical activity and level of exertion, as well as body complaints in Swedish high school students. A total of 993 high school students aged 16–19 years participated in the study. A questionnaire was completed at school and included questions about self-related health, physical activity behavior, type of physical activity/sport, intensity, duration, possible injuries or complaints, and absence from physical training at school, during the last 3 months. The results showed that 26% of the high school students participated in sports on a regular basis. Males reported significantly better health than females (p < 0.0005). A significantly higher number of females participated in physical activities at a lower level of effort (p < 0.0005) and a higher number of males trained at a higher level of effort (p < 0.005). Sixty-one percent reported body pain during the last 3 months, representing a higher number of females than males (p = 0.03). A higher number of females than males reported complaints from the back (p = 0.002), the knees (p = 0.015), the neck (p = 0.001), and the hip (p = 0.015). Females with body complaints reported poorer health than those without complaints. There was a correlation between poor self-related health and a lower level of physical effort (0.219; p < 0.001). The results showed that the prevalence of musculoskeletal symptoms was high in this population and demonstrated a certain association with self-related health. Therefore, it is important to make it easy for adolescents to perform physical activity at school and during their leisure time in order to prevent chronic diseases.
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| 5. |
- Alricsson, Marie, et al.
(författare)
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Self-reported health, physical activity and prevalence of complaints in elite cross-country skiers and matched controls
- 2005
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Ingår i: Journal of Sports Medicine and Physical Fitness. - 0022-4707 .- 1827-1928. ; 45:4, s. 547-552
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Tidskriftsartikel (refereegranskat)abstract
- Aim. The purpose of this study was to compare physical health, physical activity and location for possible symptoms in high school students with cross-country skiers of the same age from ski high schools. Another aim was to study back pain with regards to influence on skiing.Methods. The subjects studied were: 92% (n=120) of all Swedish cross-country skiers at ski high schools and 68% (n=993) of regular high school students from the North part of Sweden answered a reliable questionnaire (r=1) with regards to health, physical activity and location of possible symptoms/injuries during the last 3 months. Furthermore, the skiers answered questions on possible ski related back pain.Results. All skiers were active also in other sports compared with 26% of the controls and at considerably higher levels of physical effort than the controls; 92% of the skiers and 76% of the controls described themselves as healthy, meaning "very good" or "good" (P=0.0001); 55% of the skiers and 64% of the controls reported recent symptoms (P=0.06); 47% of the skiers reported previous or present complaints of back pain, mainly low back pain, which could be relieved by changing body position from a flexed to a more extended one while skiing, and 77% reported their back pain to disappear during rest.Conclusion. These results show the need for encouraging regular high school students to participate in sport. It also shows the importance of introducing preventative strategies regarding back pain to long-distance cross-country skiers, who are exposed to a prolonged flexed position of their back.
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| 8. |
- Alricsson, Marie
(författare)
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The elite cross-country skier : clinical and sports related functional tests, dance training, injuries and self-related health
- 2003
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The general aim of this thesis was to study cross-country skiers regarding the effect of dance training on joint mobility and muscle flexibility of the spine, hip and ankle and on speed and agility. Another aim was to perform test-retests of joint mobility and muscle flexibility of the hip and of sports related functional tests. A further aim was to compare high school students with age matched cross-country skiers concerning physical health, activity and location for possible symptoms/injuries. Finally, the aim was to study back pain regarding influence on skiing in high school cross-country skiers. Athletes aged 11 years (8 boys, 3 girls) completed four different test sessions for two sports related functional tests, emphasising speed and agility, the slalom-test and the hurdle-test. No significant differences were found between testing sessions for either the slalom-test (p=0.99) or the hurdle-test (p=0.96). Healthy athletic volunteers (5 males, 5 females) on average 30±16 years performed four joint motion and muscle flexibility tests at three times with one day intervals. The results using intra class correlation coefficients showed the following values 0.99 (knee flexion with hip extended), 0.88 (hip extension with knee extended), 0.93 (hip flexion with knee extended), and 0.53 (a combination of abduction and external rotation of the hip). Subsequently, three out of the four tests showed a good reliability. A group of young (aged 12-15 years) cross-country skiers (n=10) performed dance training during 8 months. Another aged matched group of cross-country skiers (n=10) served as a reference group. Before, during and after the intervention period joint mobility and muscle flexibility of the spine, hip and ankle as well as sports related functional tests were performed in all skiers from both groups. The results showed improvements in speed, agility and range of motion of the spine in most of the studied parameters. A group of elite cross-country skiers (aged 19±3.9 years) either performed additional preseason dance training for 3 months (n=16) or served as a reference group (n=10). Before and after the intervention period joint mobility and muscle flexibility of the spine, hip and ankle and sports related functional tests were performed in all skiers. Prior to dance training the intervention group showed a slight impairment of range of motion of the spine and the relationship between kyphosis of the thoracic and lordosis of the lumbar spine compared with the reference group. After dance training these parameters were improved and a tendency towards a positive effect on back pain was also found. Using a questionnaire cross-country skiers from ski high schools (n=120) were found to be considerably more physical active in as well other sports as skiing when compared with age matched ordinary high school students (n=993). In comparison with controls a higher number of ski high school students described themselves to be physically healthy. Half of the cross-country ski students complained of back problems, mainly low back pain, while skiing and above all during diagonal skiing.
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| 9. |
- Alricsson, Marie, et al.
(författare)
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Young elite cross-country skiers and low back pain : A 5-year study
- 2006
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Ingår i: Physical Therapy in Sport. - : Elsevier BV. - 1466-853X .- 1873-1600. ; 7:4, s. 181-184
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Tidskriftsartikel (refereegranskat)abstract
- Objectives To evaluate possible changes in spinal curvature over a period of 5 years of an elite cross-country skiing squad, and to study whether there are any differences in this respect between individuals who report low back pain and those how do not. Participants Fifteen young cross-country skiers (M age=13.6±0.9) participated voluntarily throughout the entire study period. Main outcome measures Debrunner's kyphometer was used for measuring the difference between thoracic kyphosis and lumbar lordosis of the spine. All subjects also answered a questionnaire including questions about ski-related low back pain, the amount of ski training, and participation in other sports. Results The results at the end of the 5-year period comprise data from 15 skiers (M age=18.5±0.9 years). The relationship between thoracic kyphosis and lumbar lordosis increased from 3.5° to 13.1°, respectively (p=0.0001). Of the 15 elite cross-country skiers, seven reported low back pain at the 5-year examination. At the 5-year follow-up, skiers with low back pain showed significantly higher relationship between thoracic kyphosis and lumbar lordosis than did those skiers without low back pain, 18.2° and 10.5°, respectively (p=0.035). Of the eight elite cross-country skiers without low back pain, seven were also involved in other sports (p=0.005). Conclusions Based on these findings, our advice is that adolescent cross-country skiers also should participate in other physical activities besides cross-country skiing.
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| 10. |
- Eckerman, Mattias, et al.
(författare)
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The Relationship Between Personality Traits and Muscle Injuries in Swedish Elite Male Football Players
- 2020
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Ingår i: Journal of sport rehabilitation. - : Human Kinetics. - 1056-6716 .- 1543-3072. ; 29:6, s. 783-788
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Tidskriftsartikel (refereegranskat)abstract
- Context:The physical and mental demands of an elite football player are complex, which may explain why injuries are commonin football. At elite level, muscle injuries of the lower-extremity are the most common among male football players, and theresearch hitherto is limited. Objective: To investigate whether personality traits affect the incidence of muscle injuries amongmale football players from the first league in Sweden. Design: Prospective cohort study. Participants: A male football team fromthe first league in Sweden was prospectively followed, in terms of muscle injuries of the lower-extremity during 8 seasons,between 2007 and 2015. Intervention: All muscle injuries included in this study were evaluated and diagnosed withultrasonography. Players from the team filled out the Swedish Universities Scales of Personality questionnaire. SwedishUniversities Scales of Personality questionnaire consists of 91 items and is divided into 13 categories. Main Outcome Measures:The raw values of each scale were linearly transformed to T scores, having a mean (SD) of 50 (10). All variables weresummarized with standard descriptive statistics, such as frequency, mean, and SD. As data were of interval scale and no variabledistribution was severely skewed, differences between noninjured players, rarely injured players, and frequently injured playerswere analyzed with 1-way analysis of variance with post hoc tests by Tukey honestly significant difference test. Results:No significant difference in personality traits were observed between noninjured players, rarely injured players, and frequentlyinjured players regarding number of muscle injuries (P > .05). However, a trend (P = .07) was seen, where frequently injuredplayers scored higher on stress susceptibility than rarely injured players. Conclusion: A player’s stress susceptibility should betaken into consideration by the player, coaches, and medical staff when assessing the risk of a muscle injury. Also, preventivemeasures available for these players may need to be considered.
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