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| 2. |
- Back, Jenny, 1984-, et al.
(författare)
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Drop-out from team sport among adolescents : A systematic review and meta-analysis of prospective studies
- 2022
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Ingår i: Psychology of Sport And Exercise. - Amsterdam : Elsevier. - 1469-0292 .- 1878-5476. ; 61
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Forskningsöversikt (refereegranskat)abstract
- During the last decades, an increased drop-out rate in adolescents’ team sport participation is observed. Given the potential adverse consequences of drop-out from team sport more information about risk factors for drop-out is warranted. The objectives of this systematic review were to (1) synthesise the literature on factors associated with future drop-out from team sport among adolescents and (2) investigate the strength of associations between drop-out and related factors with meta-analysis. The databases Academic Search Elite, ERIC, PsycINFO, PubMed and SPORTDiscus were searched for relevant publications from the earliest reported date until October 8, 2021. Articles were included if: (1) data about drop-out was collected; (2) the focus was on adolescents; (3) the context was team sport and (4) studies were of prospective design. We used the Risk of Bias Assessment Tool for Non-randomized Studies (RoBANS) to assess the risk of bias in included studies. A narrative synthesis was conducted according to the reporting guideline of synthesis without meta-analysis. Studies that presented statistical data necessary for the calculation of Hedge’s g effect sizes were included in the meta-analysis. In total, 16 studies met the inclusion criteria and were included in the narrative synthesis. The meta-analysis included 12 of the studies. Altogether, 6304 adolescent team sport players participated in the selected studies. Of those studies, most had a focus on intrapersonal factors relationship with drop-out. The results showed that constructs related to motivation as well as sport experience had the strongest relationships with drop-out. To prevent drop-out from adolescents’ team sport, organisations and clubs are recommended to focus on developing a high-quality motivation climate that facilitates motivation and enjoyment. © 2022 The Authors
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| 3. |
- Back, Jenny, 1984-, et al.
(författare)
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Psychological risk factors for exercise dependence
- 2021
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Ingår i: International Journal of Sport and Exercise Psychology. - New York : Routledge. - 1612-197X .- 1557-251X. ; 19:4, s. 461-472
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Tidskriftsartikel (refereegranskat)abstract
- The main aim of this study was to investigate if exercisers' personality characteristics were associated with exercise dependence. Specifically, the purpose was to examine if anxiety, obsessive passion, and physical appearance orientation were associated to an increased risk for exercise dependence. Participants were 330 exercisers from exercise groups, sport clubs and university sport science classes in the southwest of Sweden. Data were analysed using CHAID (Chi-squared Automatic Interaction Detection) analysis. The CHAID analysis indicated that anxiety was the main predictor of exercise dependence. More specifically, 12.7% more exercisers who experienced high levels of anxiety symptoms (i.e. scores above 6), were, in comparison to the exercises experiencing low levels of anxiety, classified as ?at risk for exercise dependence?. For exercisers that reported low levels of anxiety symptoms (i.e. scores below 7), obsessive passion for exercise was a positive statistically significant predictor (absolute risk difference?=?8.6%). Overall, the results highlight anxiety as a main risk factor behind exercise dependence. Also, the risk of exercise dependence may increase either from obsessive passion or as a coping strategy for anxiety. Furthermore, results may illustrate two types of exercise dependence; ?primary? exercise dependence driven mainly by an obsessive passion for exercise and ?secondary? exercise dependence where exercise function as a strategy to cope with anxiety.
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| 4. |
- Back, Jenny, 1984-, et al.
(författare)
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Psychosocial Predictors of Drop-Out from Organised Sport : A Prospective Study in Adolescent Soccer
- 2022
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Ingår i: International Journal of Environmental Research and Public Health. - Basel : MDPI. - 1661-7827 .- 1660-4601. ; 19:24
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Tidskriftsartikel (refereegranskat)abstract
- In recent years an increased drop-out rate in adolescents' soccer participation has been observed. Given the potentially adverse consequences of drop-out from soccer, more information about risk factors for drop-out is warranted. In the current study, Classification and Regression Tree (CRT) analysis was used to investigate demographic and motivational factors associated with an increased risk of drop-out from adolescent soccer. The results of this study indicate that older age, experiencing less autonomy support from the coach, less intrinsic motivation, being female, and lower socioeconomic status are factors associated with an increased risk of drop-out. An interpretation of the results of this study is that coaches play a central part in creating a sports context that facilitates motivation and continued soccer participation. Based on the findings of the current study we propose that soccer clubs implement theoretically informed coach education programs to help coaches adopt autonomy-supportive coaching strategies.
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| 5. |
- Back, Jenny, 1984-, et al.
(författare)
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Psychosocial risk factors for dropout from adolescents’ soccer
- 2023
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Konferensbidrag (refereegranskat)abstract
- Background: The number of adolescents that drop out of soccer has increased the last decades. As soccer participation may represent a substantial part of adolescents’ physical activity, efforts to reduce drop-out are important. To develop effective prevention programs, knowledge about why adolescents drop out is needed.Purpose of the study: Using a prospective design, over three consecutive seasons, we investigate differences in motivation and coach autonomy support between adolescents that stay in soccer and adolescents that drop out.Methods: Participants were 738 adolescents (462 males and 275 females), 11-17 years old (M = 13.72, SD = 1.77) from soccer clubs in Sweden. Data about demographics, motivational regulations and coach autonomy support was collected in 2019, drop-out data at the end of seasons in 2019-2021. We used Mann-Whitney u-test to analyse potential differences between the two groups. A p-value <.05 was considered a statistically significant result. Cohen’s d effect size was calculated for each comparison.Findings: Of the participants, 256 (34,7%) dropped out until the end of the 2021 season. Dropouts experienced lower intrinsic motivation (U=55263, N1=479, N2=253, p=.006, d=0,15), more amotivation (U=66358, N1=482, N2=256, p=.042, d=0,13) and less coach autonomy support (U=49566, N1=479, N2=253, p=<.001, d=0,30). Regarding identified motivation (U=57329, N1=482, N2=255, p=.13, d=0,11) and introjected motivation (U=64628, N1=482, N2=256, p=.25, d=0,08) no statistically significant differences were found.Conclusion: To facilitate motivation and continued soccer participation we propose theoretically informed education programs to help coaches adopt autonomy-supportive coaching strategies.
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| 6. |
- Ewerlöf, Sofia, et al.
(författare)
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DN Debatt. ”Låt gräsklipparen stå – för naturens skull”
- 2023
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Ingår i: Dagens nyheter (DN debatt). - 1101-2447.
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Tidskriftsartikel (populärvet., debatt m.m.)abstract
- In an era of species extinction and climate change, we should abandon the well-trimmed lawn and let gardens grow wilder, writes Anna Persson and other researchers and landscape architects on DN Debatt.
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| 7. |
- Gredin, Viktor, 1986-, et al.
(författare)
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Exploring psychosocial risk factors for dropout in adolescent female soccer
- 2022
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Ingår i: Science and medicine in football. - Oxfordshire : Routledge. - 2473-3938 .- 2473-4446. ; 6:5, s. 668-674
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Tidskriftsartikel (refereegranskat)abstract
- Objectives: We examined the manner in which age, participation in other sports, socioeconomic status, perceived sport competence, achievement goal orientations, and perceived motivational climate may interact to predict the risk of dropout among adolescent female soccer players.Methods: Self-reported data from 519 female soccer players between 10 and 19 years of age (M = 13.41, SD = 1.77) were analysed using a person-centred approach to uncover the interactions among risk factors and their relative predictability of dropout.Results: Perceived motivational climate was identified as the main predictor, where relatively lower levels of mastery climate were associated with a higher dropout tendency (absolute risk reduction [ARR] = 12.2% ±6.1% [95% CL]). If combined with relatively lower levels of mastery climate, then relatively lower levels of perceived sport competence were related to higher dropout risks (ARR = 16.5% ±9.5%), whereas, in combination with relatively higher levels of mastery climate, then relatively lower levels of ego-orientated achievement goals were associated with higher dropout rates (ARR = 10.8% ±12.6%).Conclusions: Our findings afford novel insights into the interactions between, and the relative importance of, various risk factors for dropout in adolescent female soccer. This knowledge may be useful for soccer associations, clubs, and coaches when developing guidelines and strategies that aim to foster young females’ sustained participation in organised soccer.
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| 8. |
- Jonsson, Linus, 1986-, et al.
(författare)
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Changes in amotivation, external regulation, and intrinsic regulation predicted dropout from youth soccer during the COVID-19 pandemic
- 2023
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Konferensbidrag (refereegranskat)abstract
- Background: Regular sport participation is essential for youths physical, mental, and social health. Research shows, however, that sports participation peaks at around 10-14 years of age before declining through adolescence. Soccer, which is the most popular youth sport in Sweden, is no exception to dropout problems during adolescence. Purpose of the study: The purpose was to examine longitudinal changes in youth soccer players motivational regulations during the first year of the Covid-19 pandemic in Sweden, and how longitudinal changes in motivational regulations predicts dropout from youth soccer.Methods: Self-reported data was collected from 325 youth soccer players between 11 and 17 years of age (M = 13.08) at the beginning of the season in 2019 (TI) and 2020 (T2) and dropout data was reported by the coaches at the end of the season in 2021 (T3). Latent change score analyses, using Bayesian estimator, was used to examine change in the players motivational regulations. Findings: There was a credible increase in amotivation (β = 0.14) and a credible decrease in identified regulation (β = -0.41) between T1 and T2. Changes in amotivation (β = 0.16), external regulation (β = 0.14), and intrinsic regulation (β = -0.15) between T1 and T2 were credible predictors of dropout from soccer at T3. Conclusion: To reduce the risk of dropout from youth soccer, during an ongoing pandemic, it is important to mitigate increases in amotivation and external regulation and to facilitate intrinsic motivation.
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| 9. |
- Jonsson, Linus, 1986-, et al.
(författare)
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Changes in amotivation was the only credible predictor of dropout in a sample of Swedish youth soccer players during the COVID-19 pandemic
- 2023
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Ingår i: 8th International Self-Determination Theory Conference. ; , s. 33-33
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Konferensbidrag (refereegranskat)abstract
- Background: Regular sport participation is essential for youths physical, mental, and social health. Research shows, however, that sports participation peaks at around 10-14 years of age before declining through adolescence. Soccer, which is the most popular youth sport in Sweden, is no exception to dropout problems during adolescence.Objectives: The purpose was to examine longitudinal changes in youth soccer players motivational regulations during the first year of the Covid-19 pandemic in Sweden, and how longitudinal changes in motivational regulations predicts dropout from youth soccer.Design: Three-wave survey. Methods: Self-reported data was collected from 325 youth soccer players between 11 and 17 years of age (M = 13.08) at the beginning of the season in 2019 (T1) and 2020 (T2) and dropout data was reported by the coaches at the end of the season in 2021 (T3). Latent change score analyses, using Bayesian estimator, was used to examine change in the players motivational regulations.Results: There was a credible increase in amotivation (β = 0.14) and a credible decrease in identified regulation (β = -0.41) between T1 and T2. Changes in amotivation (β = 0.15) between T1 and T2 were the only credible predictor of dropout from soccer at T3.Conclusions: To reduce the risk of dropout from youth soccer, during an ongoing pandemic, it is important to mitigate increases in amotivation.
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| 10. |
- Lindborg, Jenny, et al.
(författare)
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Större tankar - Det samhällsekonomiskt lönsamma i att subventionera vätgastankstationers infrastruktur
- 2021
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Det svenska elsystemet står inför en rad utmaningar. En ökande andel intermittent energi ställer ökade krav på balansering i våra nät, dessutom pågår en samhällsomfattande elektrifiering samtidigt som nyetablerade industrier ställer höga krav på tillgängligheten av effekt. Parallellt pågår ett omfattande arbete att minska Sveriges utsläpp av växthusgaser. Vätgas väntas anta en nyckelroll; främst inom industrin men även inom transportsektorn. Etableringen av en storskalig användning av vätgas öppnar samtidigt upp för att skapa energinyttor i andra delar av samhället, inte minst vad det gäller att stötta upp elnäten genom att erbjuda energilagringskapacitet och flexibilitet. I denna studie har ett framtidsscenario (år 2045) utretts. Det bygger på data från Svenska kraftnät samt på två hypotetiska utvecklingstrender; 1. Vätgas har antagit en dominerade roll inom elektrifieringen av transportsektorn. Vätgastankstationer är lika vanligt förekommande som dagens bränslestationer för vägbundna fordon. 2. Nämnda vätgastankstationer skalar upp vätgaslagringskapaciteten för att parallellt med att tillgodose transportbehovet även skapa nätnytta på transmissionsnätsnivå och därigenom minska behovet av investeringar i nätförstärkningar. Studiens syfte har varit att utreda den tekniska potentialen för ovanstående framtidsscenario, samt att undersöka hur en sådan utveckling av tankstationernas verksamhet skulle kunna komma att påverka priset på vätgas som bränsle. Dessutom har det i studien utretts om den ekonomiska besparing som de uteblivna nätförstärkningarna medför hade varit tillräckliga för att skapa politiska styrmedel i form av ett investeringsstöd riktat till ägare av tankstationerna för att täcka installationskostnaden för de utökade lagren. De nättekniska analyserna har i studien begränsats till att utreda vätgasens potentiella nätnytta vid handelsgränser på stamnätsnivå mellan elområden i Sverige samt vid förbindelser till våra grannländer. Studien har också begränsats till att enbart undersöka nätnyttan vid de handelsgränser som har ett förväntat behov av nätförstärkningar i framtiden. Resultat av studien visar: • Utökade lager vid vätgastankstationer kan skapa ett visst stöd till transmissionsnätet där handelsflödet når gränsen för den maximala handelskapaciteten. Förutsättningen är att det enbart inträffar stundtals och vid tidpunkter utspridda över året. Den totala nätnyttan är således väldigt begränsad. Ett fåtal undantag för detta har noterats där nätnyttan blir mer betydande. I dessa fall krävs dock en betydligt större bränslecellskapacitet vid de tänkta tankstationerna än vad som kan tänks vara standard för en vätgastankstation för att kunna tillhandhålla tillräcklig effekt i nätet. • Den utökade lagringskapaciteten vid tankstationerna har stor påverkan på vätgaspriset. Två parametrar som är av stor betydelse för detta är elpris och 6 (72) CAPEX (investeringskostnad). Ett investeringsstöd på minst 50% behövs för att priset på vätgas ska bli lägre för en tankstation med ett lager på 4 000 kg (utökat lager, även inkluderande en bränslecell på 300 kW), jämfört med ett lager på 100 kg (standard-lager). • Det råder begränsade förutsättningarna för ett betydande investeringsstöd för vätgastankstationer enbart baserat på den nätnytta som vätgastankstationer kan generera på transmissionsnätnivå. Två faktorer som visats ha stor betydelse för resultatet är valet av styrstrategi för hur lagerkapaciteten ska kunna nyttjas av näten samt tillgänglig bränslecellskapacitet vid tankstationerna. • Mer omfattade stödsystem blir möjliga först när fler ”vätgas-nyttor” vägs in. Det sakas dock idag kunskap om hur ett sådant stöd skulle utformas. Utöver ovanstående resultat genomförs en inventering av andra ”nyttor” som tankstationerna skulle kunna bidra med, både mot nätet men andra energimarknader. Sammanfattningsvis kan det konstateras att decentraliserade vätgastankstationer utgör ett intressant inslag i den framtida energimarknaden med flera potentiella användningsområden. Det råder också goda möjligheter för att bygga mer komplexa affärsmodeller/ekonomiska styrmedel då fler nyttor tas i beaktande. Av studien framgår det tydligt att även om nyttan av tankstationernas lager är begränsad på stamnätsnivå är möjligheterna betydligt större på lägre nätnivåer. I dessa sammanhang är det mer troligt att vätgasen kan komma att ta en mer betydande roll.
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