Search results for "biome"
showing 10 items of 4164 documents
Kiihtyvyysanturien käyttö mäkihypyn ponnistusnopeuden määrityksessä
2006
Tutkielman tavoitteena oli selvittää kiihtyvyysanturien soveltuvuutta mäkihypyn ponnistusnopeudenmittaamiseen. Kiihtyvyysantureilla voitaisiin mahdollisesti vähentäämittauksiin ja analysointiin kuluvaa aikaa ja taloudellisia resursseja verrattuna aiemminkäytettyihin menetelmiin. Ensimmäisessä vaiheessa mitattiin yhden koehenkilön kelkkaergometrissasuoritettujen hyppyjen (14 kpl) ponnistusnopeudet kiihtyvyysanturiltaja vertailunopeudet ponnistusetäisyyden ja voimasignaalin avulla. Anturilta laskettiinlineaarisen kiihtyvyyden kuvaaja liikesuuntaan ja integroitiin se lähtönopeuden selvittämiseksi.Toisessa vaiheessa nuoren maajoukkuetason hyppääjän suorituksia tallennettiin3 kappaletta Vuokatin…
Reaktiovoimantuotto, nopeus ja tekniikka pituushypyn ponnistusvaiheessa
2011
Pituushypyn tulokseen vaikuttavat ponnistusvaiheessa eniten kehon massakeskipisteen lähtönopeus, mutta myös sekä massakeskipisteen lähtökorkeus että lähtökulma. Pi-tuushyppyä on aikaisemmin tutkittu melko laajasti – eniten liikeanalyysimenetelmin. Sen sijaan reaktiovoimatutkimuksia löytyy paljon vähemmän. Tämän tutkimuksen tarkoitus olikin selvittää pituushyppysuorituksen kannalta keskeisiä reaktiovoimamuuttujia ja no-peuksia valmentajien tueksi ja arvioida niiden soveltuvuutta testipatteristoon. Menetelmät. Koehenkilöinä oli kaksi kansallisen tason naishyppääjää ja yksi kansallisen tason mieshyppääjä (ikä 22,3 ± 1,5 vuotta, pituus 174,3 ± 11,1 cm, paino 58,7 ± 2,5 kg, ennätys 6,25 ± 0,67 m…
Lähestymisnopeuden vaikutus käännöksen voimantuottoon ja nopeuteen vapaauinnissa
2003
Marko Tapani Malvela, 2003. Lähestymisnopeuden vaikutus käännöksen voimantuottoon ja nopeuteen vapaauinnissa. Biomekaniikan pro gradu –työ, Liikuntabiologian laitos, Jyväskylän Yliopisto, 73 sivua. Käännöksellä on vaikutusta kilpauintisuorituksen kokonaisaikaan. Sen suhteellinen vaikutus kasvaa uintimatkan lyhentyessä. Lyhyillä vapaauintimatkoilla, 25 metrin altaalla, käännöksen merkitys k okonaisajasta on jopa 20 - 36 % (Thayer & Hay, 1984). Tämä seikka nostaa käännöksen harjoi ttelun yhdeksi tärkeäksi kokonaisuudeksi startti- ja uintitekniikkaharjoittelun rinnalle. Tämän tutkimuksen tarkoituksena olikin selvittää uimarin lähestymisnopeuden vaikutuksia käännöksen nopeuteen ja voimantuottoo…
Association between spinal disorders and different domains of physical activity among young adult men
2022
BackgroundThere is limited evidence of how physical activity (PA) associates with low back pain (LBP) and neck pain (NP). Particularly, the association between occupational or commuting PA and LBP/NP is unclear. The aim of the present cross-sectional study was to investigate the association between spinal disorders and different physical activity domains in young and healthy adult men.MethodsSelf-reported leisure time, occupational and commuting PA, as well as LBP and NP, were studied using questionnaires among young Finnish males (n = 1,630). Logistic regression analysis was used to study the associations of PA domains, physical fitness, and spinal disorders. Regression models were adjuste…
A common biological basis of obesity and nicotine addiction
2013
Contains fulltext : 128630.pdf (Publisher’s version ) (Open Access) Smoking influences body weight such that smokers weigh less than non-smokers and smoking cessation often leads to weight increase. The relationship between body weight and smoking is partly explained by the effect of nicotine on appetite and metabolism. However, the brain reward system is involved in the control of the intake of both food and tobacco. We evaluated the effect of single-nucleotide polymorphisms (SNPs) affecting body mass index (BMI) on smoking behavior, and tested the 32 SNPs identified in a meta-analysis for association with two smoking phenotypes, smoking initiation (SI) and the number of cigarettes smoked …
Innovations in Infant Feeding: Future Challenges and Opportunities in Obesity and Cardiometabolic Disease
2020
The field of nutrition in early life, as an effective tool to prevent and treat chronic diseases, has attracted a large amount of interest over recent years. The vital roles of food products and nutrients on the body’s molecular mechanisms have been demonstrated. The knowledge of the mechanisms and the possibility of controlling them via what we eat has opened up the field of precision nutrition, which aims to set dietary strategies in order to improve health with the greatest effectiveness. However, this objective is achieved only if the genetic profile of individuals and their living conditions are also considered. The relevance of this topic is strengthened considering the importance of …
The association of cannabis use with fast-food consumption, overweight, and obesity among adolescents aged 12-15 years from 28 countries
2022
Background: Cannabis legalization and use have risen globally. However, the association between cannabis use, eating behaviors and body weight among adolescents is yet unexplored. Objectives: This study examined the association between cannabis use, fast-food consumption, overweight and obesity in 28 countries using data from the 2010–2016 Global School-Based Student Health Survey. Methods: Multivariable logistic regression and meta-analysis were performed among a sample of 83,726 adolescents (48.7% females) aged 12–15 years, mean (SD) age of 13.8 (0.9) years. Results: The overall prevalence of cannabis use (in past 30 days) and fast-food consumption (in past 7 days) were 2.8% and 57.3% res…
Depletion of
2020
Child obesity constitutes a risk factor for developing insulin resistance which, if sustained, could lead to more severe conditions like type 2 diabetes (T2D) in adulthood. Our study identified previously unknown species whose depletion (Blautia luti and Blautia wexlerae) is associated with insulin resistance in obese individuals. Our results also indicate that these bacterial species might help to reduce inflammation causally linked to obesity-related complications. Childhood is considered a window of opportunity to tackle obesity. These new findings provide, therefore, valuable information for the future design of microbiota-based strategies for the early prevention of obesity-related com…
Obesity and diabetes-Not only a simple link between two epidemics
2018
Summary Diabetes (DM) as well as obesity, due to their increasing incidence, were recognized as epidemic by the World Health Organization. Obesity is involved not only in the aetiopathogenesis of the most common worldwide type of DM—type 2 diabetes—but also in the development of its complications. There is also increasing scientific evidence regarding the role of obesity and overweight in type 1 diabetes. Weight gain may be considered as a complication of insulin treatment but also reveals significant pathophysiological impact on various stages of the disease. Another very important aspect related to DM as well as obesity is the microbiome, which is highly variable. The function of the gut …
Aiming strategy affects performance-related factors in biathlon standing shooting
2021
This study focused on investigating differences in shooting performance and performance related factors between two different aiming strategies (HOLD, low radial velocity during the approach 0.4‐0.2 seconds before triggering, and TIMING, high radial velocity) in biathlon standing shooting. 23 biathletes fired 8x5 standing shots at rest (REST) and 2x5 shots during a race simulation (RACE). Shooting performance (hit point distance from the center of the target), aiming point trajectory and postural balance were measured from each shot. Shooting performance was similar both at REST (HOLD 33±5 mm vs TIMING 38±8 mm, p=0.111) and in RACE (40±11 mm vs 47±12 mm, p=0.194). Better shooting performanc…