Search results for "DXA"
showing 10 items of 18 documents
Alaraajojen luun mineraalipitoisuuden ja polven nivelruston väliset yhteydet postmenopausaalisilla naisilla
2011
Tämän poikkileikkaustutkimuksen tarkoituksena oli selvittää luuston (reisiluun kaula, lanneranka L2-L4) mineraalitiheysarvojen ja polven nivelruston (reisiluu, sääriluu) eheyttä kuvaavien dGEMRIC-arvojen välistä yhteyttä postmenopausaalisilla naisilla. Tutkimukseen rekrytoitiin 82 naista (keskimääräiseltä iältään 57,7 vuotta, SD 4,2) lehti-ilmoituksen perusteella. Sisäänottokriteerinä oli rtg:llä arvioidun Kellgren-Lawrence-luokituksen (K/L) mukaan ensimmäisen (K/L1) tai toisen (K/L2) asteen lievä polven nivelrikko. Reisiluun kaulan ja lannerangan (L2–L4) BMC-arvot mitattiin DXA-laitteistolla. Tutkimushenkilöillä ei ollut osteoporoosia, jonka kynnysarvona käytettiin T-arvoa >2,5. Tibian ja …
Physical activity volume and intensity distribution in relation to bone, lean and fat mass in children.
2022
Funder: City of Kuopio
Relationship between lower limb neuromuscular performance and bone strength in postmenopausal women with mild knee osteoarthritis.
2014
Objectives: To investigate whether neuromuscular performance predicts lower limb bone strength in different lower limb sites in postmenopausal women with mild knee osteoarthritis (OA). Methods: Neuromuscular performance of 139 volunteer women aged 50-68 with mild knee OA was measured using maximal counter movement jump test, isometric knee flexion and extension force and figure-of-eight-running test. Femoral neck section modulus (Z, mm³) was determined by data obtained from dualenergy X-ray absorptiometry. Data obtained using peripheral quantitative computed tomography was used to asses distal tibia compressive (BSId, g2/cm4) and tibial mid-shaft bending (SSImaxmid, mm3) strength indices. R…
The Mediating Role of Endocrine Factors in the Positive Relationship Between Fat Mass and Bone Mineral Content in Children Aged 9-11 Years: The Physi…
2022
IntroductionWe aimed to investigate whether the relationship between fat mass and bone mineral content (BMC) is mediated by insulin, leptin, adiponectin, dehydroepiandrosterone sulphate, testosterone and estradiol in children aged 9-11 years.Materials and MethodsWe utilised cross-sectional data from the Physical Activity and Nutrition in Children study (n = 230 to 396; 112 to 203 girls). Fat mass and BMC were assessed with dual-energy X-ray absorptiometry. Endocrine factors were assessed from fasted blood samples. We applied the novel 4-way decomposition method to analyse associations between fat mass, endocrine factors, and BMC.ResultsFat mass was positively associated with BMC in girls (ß…
Kehon koostumuksen arvioiminen ihopoimumittauksella, biosähköisellä impedanssilla ja kaksienergisen röntgensäteilyn absorptiometrialla
2010
Ojala, Paula Emilia. Kehon koostumuksen arvioiminen ihopoimumittauksella, biosähköisellä impedanssilla ja kaksienergisen röntgensäteilyn absorptiometrialla. Liikuntafysiologian kandidaatintutkielma. Liikuntabiologian laitos, Jyväskylän yliopisto. Syksy 2010. 56s. Tutkimuksen tarkoituksena oli selvittää ovatko kaksienergisen röntgensäteilyn absorptiometrialla (DXA), biosähköisellä impedanssilla (BIA) ja ihopoimujen paksuusmittauksella (SF) arvioidut kehon rasvaprosentit yhtäläisiä. Vedenalaisesta punnitusmenetelmästä on suurimmaksi osaksi jo luovuttu maailmalla ja DXA on todettu luotettavaksi ja tarkaksi menetelmäksi kehon koostumuksen arvioimisessa. Sen vuoksi BIA:n ja SF:n tuloksia verratt…
Nopean painonpudotuksen vaikutukset kehon koostumukseen sekä neste- ja hormonitasapainoon kansallisen huipputason painijoilla
2007
Sarkkinen, Pasi 2007. Nopean painonpudotuksen vaikutukset kehon koostumukseen sekä neste- ja hormonitasapainoon kansallisen huipputason painijoilla. Liikuntabiologian laitos, Jyväskylän yliopisto. Pro Gradu –tutkielma. Nopean ja suuren painonpudotuksen vaikutuksia urheilijan elimistöön on tutkittu verrattain vähän ja mahdollisia terveydellisiä riskejä ei ole juurikaan tiedostettu. Nopea painonpudotus on hyvin yleisesti käytetty menetelmä painoluokkalajeissa, kun normaalipaino ylittää kilpailusarjan. Painijoiden painon pudotus ala- ja keskisarjoissa on useimmiten 5-8 kg eli 8-12 % kehonpainosta. 18 tervettä suomalaista painijaa osallistui kreikkalais-roomalaisen tyylin SM-kilpailuihin (2004)…
Comparison of body segment models for female high jumpers utilising DXA images
2022
In motion analysis of sport competitions, the question is often about the most convenient choice for defining the segment endpoints when no visible landmarks can be used. The purpose of the present study was to determine the location of the body centre of mass (CoM) of female high jumpers by using a high accuracy reaction board and two different segment models: Dempster, 1955, de Leva, 1996. Digitising the bony landmarks from the images of dual energy x-ray absorptiometry (DXA) and overhead digital camera were used to compare the digitising accuracy. The location of the CoM determined by a reaction board was 55.88 ± 0.52 % of subjects’ body height. The segment model of Dempster digitized fr…
BMI and an anthropometry-based estimate of fat mass percentage are both valid discriminators of cardiometabolic risk: A comparison with DXA and bioim…
2013
Objective. To determine whether categories of obesity based on BMI and an anthropometry-based estimate of fat mass percentage (FM% equation) have similar discriminative ability for markers of cardiometabolic risk as measurements of FM% by dual-energy X-ray absorptiometry (DXA) or bioimpedance analysis (BIA).Design and Methods. A study of 40–79-year-old male (n=205) and female (n=388) Finns. Weight, height, blood pressure, triacylglycerols, HDL cholesterol, and fasting blood glucose were measured. Body composition was assessed by DXA and BIA and a FM%-equation.Results. For grade 1 hypertension, dyslipidaemia, and impaired fasting glucose >6.1 mmol/L, the categories of obesity as defined b…
Fundamental movement skill proficiency and body composition measured by dual energy X-ray absorptiometry in eight-year-old children
2014
Objective: The main aim was to examine the association between fundamental movement skills (FMS) and objectively measured body composition using dual energy X-ray absorptiometry (DXA). Methods: Study of 304 eight-year-old children in Finland. FMS were assessed with the Test of Gross Motor Development, 2nd ed. (TGMD-2). Total body fat percentage (BF%), abdominal region fat percentage (AF%), and fat-free mass (FFM) were assessed by DXA. Waist circumference, height and weight were measured and International Obesity Task Force (IOTF) cut-off values for BMI were used for the definition of healthy weight and overweight/obesity. Results: Better FMS proficiency (object-control, locomotor, total FMS…
Body composition in 18 to 88-year-old adults - comparison of multifrequency bioimpedance and dual-energy X-ray absorptiometry
2014
Objective -- This study compared bioimpedance analysis (BIA) in the assessment of body composition with dual-energy X-ray absorptiometry (DXA) in 18- to 88-year-old adults. Design and Methods -- Body composition of 882 adults was estimated by eight-polar BIA and DXA. In addition, estimates of lean mass, fat mass, and percentage of fat were investigated across a range of age and leisure time physical activity (LTPA) groups. Results -- Compared to DXA, larger lean masses (mean difference 2.9 and 1.6 kg) and smaller fat masses (3.1 and 2.6 kg) were estimated by BIA in both women and men, respectively. Differences between the methods' mean values were evident in all age and LTPA groups, except …