Search results for "Sky"

HIT-harjoittelun vaikutus maastopyöräilijöiden suorituskykyyn ja hermo-lihasjärjestelmän toimintaan

2014

HIT (high intensity training) – harjoittelua ja sen vaikutuksia suorituskykyyn on tutkittu paljon mutta hermo-lihasjärjestelmän toimintaan liittyviä tutkimuksia on varsin vähän. Tämän tutkimuksen tarkoituksena oli selvittää HIT – harjoittelun vaikutusta aktiivisten maastopyöräilijöiden fysiologiseen suorituskykyyn ja hermo-lihasjärjestelmän toimintaan sekä väsymyksen sietoon. Tutkittavina olivat 11 aktiivisesti harrastavaa maastopyöräilijää, jotka jaettiin harjoittelu- (N=5) ja kontrolliryhmään (N=6). Harjoitteluryhmä suoritti kahden viikon aikana kuusi HIT harjoitusta maastopyörällä mäkivetoina, jotka sisälsivät 4 - 6 x 30 s maksimaalista vetoa neljä minuutin …

Hemoglobin mass and performance responses during 4 weeks of normobaric “live high–train low and high”

2023

Purpose To investigate whether 4 weeks of normobaric “live high–train low and high” (LHTLH) causes different hematological, cardiorespiratory, and sea-level performance changes compared to living and training in normoxia during a preparation season. Methods Nineteen (13 women, 6 men) cross-country skiers competing at the national or international level completed a 28-day period (∼18 h day−1) of LHTLH in normobaric hypoxia of ∼2400 m (LHTLH group) including two 1 h low-intensity training sessions per week in normobaric hypoxia of 2500 m while continuing their normal training program in normoxia. Hemoglobin mass (Hbmass) was assessed using a carbon monoxide rebreathing method. Time to exhaust…

Mieslentopalloilijoiden voimaominaisuuksien säilyminen valmistavan kauden ja kilpailukauden aikana

2010

Aittokallio, Kaappo 2010. Mieslentopalloilijoiden voimaominaisuuksien säilyminen valmistavan kauden ja kilpailukauden aikana. Liikuntabiologian laitos, Jyväskylän yliopisto, 60 s. Lentopallo on intervallityyppinen laji, jossa energiantuotto on alaktista. Räjähtävällä voimal-la on lajissa keskeinen merkitys. Pelaajien vertikaalihyppykyvystä riippuva ulottuvuus ja lyönnin voimakkuus ovat tärkeimpiä joukkueen menestystä selittäviä fyysisiä tekijöitä. Näitä teho-ominaisuuksia pystytään voimaharjoittelun avulla kehittämään. Kilpailu- eli ottelukau-della tulisi voimaominaisuudet pystyä vähintään säilyttämään. Jos voimaharjoittelu lopete-taan kilpailukauden ajaksi, voimatasot laskevat ja suoritusk…

Considering lithium-ion battery 3D-printing via thermoplastic material extrusion and polymer powder bed fusion

2021

In this paper, the ability to 3D print lithium-ion batteries through thermoplastic material extrusion and polymer powder bed fusion is considered. Focused on the formulation of positive electrodes composed of polypropylene, LiFePO4 as active material, and conductive additives, advantages and drawbacks of both additive manufacturing technologies, are thoroughly discussed from the electrochemical, electrical, morphological and mechanical perspectives. Based on these preliminary results, strategies to further optimize the electrochemical performances are proposed. Through a comprehensive modeling study, the enhanced electrochemical suitability at high current densities of various complex three…

Physical fitness and anthropometrics in Finnish soldiers during their early career: prospective changes during a 3-year follow-up.

2020

IntroductionPhysical fitness is a fundamental capability required of military personnel, but studies focusing on longitudinal changes in physical fitness and anthropometrics in soldiers are lacking. The aim was to evaluate physical fitness and anthropometrics in soldiers during their early career.MethodsA 3-year prospective study included 180 male soldiers (baseline age 26±2 years) with measures of a 12 min running test, standing long jump, sit-up and push-up tests, and body mass, height and waist circumference (WC). Baseline data were stratified into tertiles, and the changes within each tertile were analysed using dependent t-tests and analysis of variance.Results12 min running test dista…

Mental Skills of an Athlete as a Resource of Professional Longevity in Sport

2021

The aim of the study was to assess associations between dimensions of mental skills, psychological readiness and predictors of career longevity among current athletes. Mental skills dimensions were measured with the Ottawa Mental Skills Assessment Tool (OMSAT). The psychological predictors of athletic career longevity were measured with the Athletic Coping Skills Scale-28 (the ACSI-28) producing scores for seven coping skills and with the Competitive State Anxiety Inventory-2 (CSAI-2) which produced scores for confidence in competition. Overall, 253 current athletes (average age 22 years) of various competitive levels (classified to 5 groups according to the national sport classification sy…

Different-day and same-session combined strength and endurance training : adaptations in neuromuscular and cardiorespiratory performance, body compos…

2017

This thesis investigated 1) acute neuromuscular and hormonal responses to combined strength and endurance loadings with different orders and their long-term adaptations (women), 2) adaptations in neuromuscular, hormonal, cardiorespiratory and health variables following 24 weeks of volume-equated protocols of combined training (men and women). Subjects were assigned to one of three groups: strength and endurance training on different days (DD: men n=21, women n=18), training in the same-session with either endurance before strength (ES: men n=16, women n=15) or vice versa (SE: men n=18, women n=14). DD trained 4-6 d·wk-1 with strength and endurance on alternating days. ES and SE trained 2-3 …

Suoritusmittauksen kehittäminen keskisuuressa palveluyrityksessä

2005

Ammatillisen peruskoulutuksen opiskelijoiden koettu fyysinen pätevyys, tavoiteorientaatio ja liikuntatuntien motivaatioilmasto sekä heidän käsityksiä…

2009

ADHD symptoms and maladaptive achievement strategies: the reciprocal prediction of academic performance beyond the transition to middle school

2023

This longitudinal study examined how two externalising behaviour problems, attention-deficit hyperactivity disorder (ADHD) and conduct disorder (CDs), are associated over time with low motivation (MAS), and how these problems effect academic performance. In our cross-lagged analysis, we found reciprocal effects between ADHD symptoms and MAS between Grades 5 and 6. Both domains also negatively predicted later academic performance. With CDs and MAS, no cross-lagged effects were found, although both were correlated and very stable over time, and negatively predicted later academic performance. These different kinds of externalising problem behaviours seem to differ in the way in which they int…