Search results for "leptiini"
showing 4 items of 4 documents
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…
The Positive Relationship between Moderate-to-Vigorous Physical Activity and Bone Mineral Content Is Not Mediated by Free Leptin Index in Prepubertal…
2021
Purpose: Moderate-to-vigorous physical activity (MVPA) positively influences bone mineral content (BMC) in prepubertal children, but it is unknown whether this relationship is partially mediated by free leptin index. The aim of this study was to examine whether the relationship between MVPA and total body less head (TBLH) BMC is mediated or moderated by free leptin index in prepubertal children. Methods: We performed a cross-sectional analysis on 401 children (194 girls) from baseline examinations of the Physical Activity and Nutrition in Childhood Study. We applied the four-way decomposition mediation analysis method to assess whether free leptin index, measured from fasted blood samples, …
Influence of Menstrual Cycle or Hormonal Contraceptive Phase on Energy Intake and Metabolic Hormones—A Pilot Study
2021
Sex hormones are suggested to influence energy intake (EI) and metabolic hormones. This study investigated the influence of menstrual cycle (MC) and hormonal contraceptive (HC) cycle phases on EI, energy availability (EA), and metabolic hormones in recreational athletes (eumenorrheic, NHC = 15 and monophasic HC-users, CHC = 9). In addition, 72-h dietary and training logs were collected in addition to blood samples, which were analyzed for 17β-estradiol (E2), progesterone (P4), leptin, total ghrelin, insulin, and tri-iodothyronine (T3). Measurements were completed at four time-points (phases): Bleeding, mid-follicular (FP)/active 1, ovulation (OVU)/active 2, mid-luteal (LP)/inactive in NHC/C…
Fitnesskilpailudieetin vaikutus ruokahalua sääteleviin hormoneihin
2022
Fitnessurheilun suosio on kasvanut Suomessa vuosi vuodelta. Lajeihin liittyy oleellisesti kehonkoostumuksen muokkaaminen lajikriteereihin sopivaksi harjoittelun ja ruokavalion keinoin. Tämän tutkimuksen tarkoituksena oli selvittää miten fitnesskilpailudieetti vaikuttaa ruokahalua säätelevien leptiini- ja greliinihormonien pitoisuuksiin seerumissa. Muuttujien palautumista seurattiin dieetin jälkeen n. 20 viikkoa. Tutkimukseen osallistui 13 miestä ja 12 naista, jotka kilpailivat fitnessurheilun SM- kilpailuissa lokakuussa 2019. Kontrolliryhmässä oli 10 miestä ja 11 naista, jotka harjoittelivat aktiivisesti kuntosalilla mutta eivät tavoitelleet painonpudotusta tutkimusjakson aikana. Kaikille t…