Search results for "reisiluu"
showing 6 items of 6 documents
Impact loading history modulates hip fracture load and location : A finite element simulation study of the proximal femur in female athletes
2018
Sideways falls impose high stress on the thin superolateral cortical bone of the femoral neck, the region regarded as a fracture-prone region of the hip. Exercise training is a natural mode of mechanical loading to make bone more robust. Exercise-induced adaptation of cortical bone along the femoral neck has been previously demonstrated. However, it is unknown whether this adaption modulates hip fracture behavior. The purpose of this study was to investigate the influence of specific exercise loading history on fall-induced hip fracture behavior by estimating fracture load and location with proximal femur finite element (FE) models created from magnetic resonance images (MRI) of 111 women w…
Do bone geometric properties of the proximal femoral diaphysis reflect loading history, muscle properties, or body dimensions?
2019
Abstract Objectives: The aim of this study was to investigate activity‐induced effects from bone geometric properties of the proximal femur in athletic vs nonathletic healthy females by statistically controlling for variation in body size, lower limb isometric, and dynamic muscle strength, and cross‐sectional area of Musculus gluteus maximus. Methods: The material consists of hip and proximal thigh magnetic resonance images of Finnish female athletes (N = 91) engaged in either high jump, triple jump, soccer, squash, powerlifting, endurance running or swimming, and a group of physically active nonathletic women (N = 20). Cross‐sectional bone geometric properties were calculated for the lesse…
Ricci-flow based conformal mapping of the proximal femur to identify exercise loading effects.
2018
AbstractThe causal relationship between habitual loading and adaptive response in bone morphology is commonly explored by analysing the spatial distribution of mechanically relevant features. In this study, 3D distribution of features in the proximal femur of 91 female athletes (5 exercise loading groups representing habitual loading) is contrasted with 20 controls. A femur specific Ricci-flow based conformal mapping procedure was developed for establishing correspondence among the periosteal surfaces. The procedure leverages the invariance of the conformal mapping method to isometric shape differences to align surfaces in the 2D parametric domain, to produce dense correspondences across an…
Kovatehoisen, iskutyyppisen harjoittelun vaikutukset reisiluun kaulan lujuuteen lievää polven nivelrikkoa sairastavilla postmenopausaali-ikäisillä na…
2013
TIIVISTELMÄ Kovatehoisen, iskutyyppisen harjoittelun vaikutukset reisiluun kaulan lujuuteen lievää polven nivelrikkoa sairastavilla postmenopausaali-ikäisillä naisilla. Satunnaistettu kontrolloitu tutkimus. Janhunen, Eija Fysioterapian Pro Gradu- tutkielma Jyväskylän yliopisto, Liikuntatieteellinen tiedekunta, Terveystieteiden laitos 2013 Sivuja 79 Ohjaajat: Prof. Ari Heinonen ja THM Juhani Multanen, Jyväskylän Yliopisto, Terveystieteiden laitos Tämän satunnaistetun kontrolloidun tutkimuksen tarkoituksena oli tutkia 12 kuukautta kestäneen iskutyyppisen harjoittelun vaikutuksia reisiluun kaulan lujuuteen lievää polven nivelrikkoa sairastavilla postmenopausaali-ikäisillä naisilla. Kahdeksanky…