0000000000382926
AUTHOR
Tuomo Pihlaja
Personal Reasons for Withdrawal from Team Sports and the Influence of Significant others among Youth Athletes
The aim of this study was to identify the main reasons for withdrawal from team sports and to examine the influence of significant others (i.e., coaches, parents, peers, and siblings) in the decision making concerning withdrawal from youth sports. An attempt was also made to compare withdrawal components and the influence of significant others in terms of gender, level of competition and years of involvement in youth sports. The participants in this study were young football (American soccer) (n=397), ice hockey (n=88) and basketball (n=50) players who had terminated their participation in their sports. Principal component analysis was used to reduce the number of withdrawal items and iden…
Joukkuelajeja harrastavien nuorten urheilupolut
Lasten ja nuorten tavoitteellinen valmennus alkoi urheiluseuroissa 1970-luvulla (Itkonen 2003, 340). Urheiluseuratoiminnan suosio on ollut näihin päiviin asti kasvava. Suosituimpia urheilulajeja ovat joukkuepalloilulajit. (Kansallinen liikuntatutkimus 2009–2010, 16.) Urheilun ja liikunnan parissa muodostuu myös jokaiselle harrastajalle oma harrastushistoriansa, jossa on sekä yksilöllisiä että yhteisiä piirteitä. Urheileminen ja liikunnan harrastaminen muodostavatkin elämänkulkuun oman, kyseiseen elämänalueeseen rajatuvan polun. Tätä voidaan kutsua urheilupoluksi. (Aarresola 2015) Tässä artikkelissa pureudumme joukkueurheilulajeja harrastavien nuorten urheilupolkuihin. Aineistona käytämme se…
Parental allocation of additional food to own health and offspring growth in a variable environment
Life-history theory predicts increased investment in current reproduction when future reproduction is uncertain and a more balanced investment in current and future reproduction when prospects for both are good. The outcome of the balance in parental allocation depends on which life-history component maximizes the fitness benefits. In our study sys- tem, a 3-year vole cycle generates good prospects of current and future reproduction for Ural owls (Strix uralensis Pallas, 1771) in increase vole phases and uncertain prospects in decrease vole phases. We supplementary-fed Ural owls during the nestling period in 2002 (an increase phase) and 2003 (a decrease phase), and measured offspring growth…