0000000000241456

AUTHOR

Matti Välimäki

Vitamin D status as a determinant of peak bone mass in young Finnish men.

Severe vitamin D deficiency causes rickets, but scarce data are available about the extent to which vitamin D status determines the development of the peak bone mass in young adults. Our aim was to evaluate the prevalence of vitamin D deficiency [serum 25-hydroxyvitamin D (25-OHD) less than the lower limit of the reference range of 20–105 nmol/liter] and the relationship between vitamin D status and peak bone mass among young Finnish men. A cross-sectional study of determinants of peak bone mass with data on lifestyle factors collected retrospectively was performed in 220 young men, aged 18.3–20.6 yr. One hundred and seventy men were recruits of the Finnish Army, and 50 were men of similar …

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Koululiikuntakokemusten yhteys aikuisiän liikuntamotivaatioon

Oksanen, V. & Välimäki, M. 2017. Koululiikuntakokemusten vaikutus aikuisiän liikuntamotivaatioon. Jyväskylän yliopisto. Liikuntatieteellinen tiedekunta. Liikuntapedagogiikan pro gradu -tutkielma. 115 sivua. Liitteet 5 sivua. Tutkielman tarkoituksena oli selvittää laadullisin tutkimusmenetelmin, millaiset koululiikuntakokemukset ovat merkityksellisiä aikuisiän liikuntamotivaation kannalta sekä sitä, miten merkityksellistä liikuntakulttuurin muutos on liikunnanopetukselle ja oppilaiden motivaatioon. Pyrimme samalla oppimaan oppilaiden kokemusmaailmasta ja luomaan mahdollisia keinoja ennaltaehkäistä kielteisten kokemusten syntymistä. Tutkimusaineisto kerättiin teemahaastatteluiden avulla joulu…

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Risk factors for clinical stress fractures in male military recruits: A prospective cohort study

This prospective study was aimed at evaluating risk factors for symptomatic stress fractures among 179 Finnish male military recruits, aged 18 to 20 years. The subjects were studied in the very beginning of the military service of 6 to 12 months in summer. Bone mineral content (BMC) and density (BMD) were measured by dual energy X-ray absorptiometry (DXA) at the lumbar spine and at the hip and heel ultrasound investigation was performed. Blood was sampled for determination of serum total and free testosterone, total and free estradiol, sex hormone-binding globulin (SHBG), procollagen type I N propeptide, total and carboxylated osteocalcin, tartrate-resistant acid phosphatase 5b, 25-hydroxyv…

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Improvisointi ohjelmistokehityksen työvälineenä

Tietojärjestelmien kehittämistä pidetään yleisesti hyvin organisoituna ja suunnitelmallisena tapahtumana. Tämä ei kuitenkaan aina pidä paikkaansa, sillä kehittäminen ei aina tapahdu hallinnoidussa ja tiukasti organisoidussa ympäristössä. Etenkin pienten ja epävirallisten järjestelmien kehittämisessä improvisoinnilla on suurehko rooli. Software development is seen as an organised process. However not all software is developed in a tightly managed and organised environment. Improvisation often plays a role in the development, especially in the case of small and informal systems.

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Childhood growth predicts higher bone mass and greater bone area in early old age: findings among a subgroup of women from the Helsinki Birth Cohort Study

Abstract Summary: We examined the associations between childhood growth and bone properties among women at early old age. Early growth in height predicted greater bone area and higher bone mineral mass. However, information on growth did not improve prediction of bone properties beyond that predicted by body size at early old age. Introduction: We examined the associations between body size at birth and childhood growth with bone area, bone mineral content (BMC), and areal bone mineral density (aBMD) in early old age. Methods: A subgroup of women (n = 178, mean 60.4 years) from the Helsinki Birth Cohort Study, born 1934–1944, participated in dual-energy X-ray absorptiometry (DXA) measuremen…

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