Factors affecting speed in human-powered vehicles.

abstract：:While previous studies highlighted the importance of the different motivations for doing sports as proposed by self-determination theory, less emphasis has been put on the simultaneous presence of multiple motivations within the same individual. Therefore, the present study aimed to investigate the complex interaction...

journal_title：Journal of sports sciences

authors： Tóth-Király I,Amoura C,Bőthe B,Orosz G,Rigó A

更新日期：2020-04-01 00:00:00

abstract：:Veteran football players above 40 years have rarely been subject to scientific investigations. This is worrisome because their number is considerable and their cardiovascular risk probably increased. Therefore, a cross-sectional study was conducted in 100 football players between 40 and 63 years of age. This included ...

journal_title：Journal of sports sciences

authors： Wegmann M,Steffen A,Pütz K,Würtz N,Such U,Faude O,Bohm P,Meyer T

更新日期：2016-01-01 00:00:00

abstract：:The main purposes of this study were to investigate the acute effects of static and dynamic lower limb stretching routines: (a) on peak torque, total external work and joint angle at peak torque of the hamstrings during maximal eccentric isokinetic leg flexion; (b) on unilateral hamstring to quadriceps (H/Q) strength ...

journal_title：Journal of sports sciences

authors： Ayala F,De Ste Croix M,Sainz De Baranda P,Santonja F

更新日期：2013-01-01 00:00:00

abstract：:Coordinative variability (CAV) and underlying coordinative patterns are potential running-related overuse injury (RROI) mechanisms, but prospective analyses are needed. This study compared lower limb CAV and coordinative patterns between prospectively injured and uninjured runners. Knee, shank, and ankle kinematics we...

journal_title：Journal of sports sciences

authors： Desai GA,Gruber AH

更新日期：2021-01-01 00:00:00

abstract：:The purpose of this study was to examine whether any differences exist in the cognitive and behavioural strategies of gymnasts competing at different elite levels. Thirty-eight male gymnasts competing at different competitive levels in an Australian gymnastic championship completed a standardized questionnaire prior t...

journal_title：Journal of sports sciences

authors： Spink KS

更新日期：1990-07-01 00:00:00

abstract：:The aim of this study was to determine whether endurance training in athletes induces airway inflammation and pulmonary function disorders. Respiratory pattern and function were analysed in ten healthy endurance runners at rest, during sub-maximal exercise, and during the recovery. Inflammatory cells and metabolites (...

journal_title：Journal of sports sciences

authors： Denguezli M,Ben Chiekh I,Ben Saad H,Zaouali-Ajina M,Tabka Z,Abdelkrim Z

更新日期：2008-10-01 00:00:00

abstract：:Despite low mineral intakes in several groups of female 'ball-game' players, investigations of blood profiles and physical performance do not indicate any evident physiological benefits of micronutrient supplementation. Nevertheless, measurements of iron status are warranted, particularly in female athletes. Iron ther...

journal_title：Journal of sports sciences

authors： Fogelholm M

更新日期：1994-07-01 00:00:00

abstract：:An evaluation of a six-week Combined minimal footwear transition and gait-retraining combination vs. gait retraining only on impact characteristics and leg stiffness. Twenty-four trained male runners were randomly assigned to either (1) Minimalist footwear transition Combined with gait-retraining over a six-week perio...

journal_title：Journal of sports sciences

authors： Warne JP,Smyth BP,Fagan JO,Hone ME,Richter C,Nevill AM,Moran KA,Warrington GD

更新日期：2017-08-01 00:00:00

abstract：:Accurate measures of heart rate (HR) during rehabilitation and sporting activities are important for precise exercise prescription to maintain or increase capacity. Wrist-worn activity monitors utilizing photoplethysmography technology (PPG) to configure HR show discrepant findings regarding validity depending on the ...

journal_title：Journal of sports sciences

authors： Støve MP,Haucke E,Nymann ML,Sigurdsson T,Larsen BT

更新日期：2019-04-01 00:00:00

abstract：:In this paper we examined the influence of opposing players constraining the decision-making of an attacker during shooting performance in futsal. Performance during 10 competitive matches was recorded and examined from the moment a shot was taken until the ball was intercepted or entered the goal in sequences of play...

journal_title：Journal of sports sciences

authors： Vilar L,Araújo D,Davids K,Correia V,Esteves PT

更新日期：2013-01-01 00:00:00

abstract：:We hypothesised that habitual physical activity (PA) together with progressive endurance training contributes to the differences in training response (Δ[V(·)]O(2max)) in healthy and physically active male participants. Twenty volunteers (age 30±3 years and [V(·)]O(2max) 54±7 ml·kg⁻¹·min⁻¹) participated in an eight-wee...

journal_title：Journal of sports sciences

authors： Hautala A,Martinmaki K,Kiviniemi A,Kinnunen H,Virtanen P,Jaatinen J,Tulppo M

更新日期：2012-01-01 00:00:00

abstract：:The aim of this study was to examine acute physiological responses and time-motion characteristics associated with three different small-sided soccer game formats in youth players. Sixteen male soccer players aged 16.3+/-0.6 years (mean+/-s) completed three variations of a small-sided game (i.e. 2 vs. 2, 4 vs. 4, and ...

journal_title：Journal of sports sciences

authors： Hill-Haas SV,Dawson BT,Coutts AJ,Rowsell GJ

更新日期：2009-01-01 00:00:00

abstract：:This study aimed to assess the effects of post-activation potentiation in the strength related variables of a kick start. Thirteen competitive swimmers performed three kick starts after a standardized warm up (denoted USUAL) and another after inducing post-activation through five isotonic repetitions on an eccentric f...

journal_title：Journal of sports sciences

authors： Cuenca-Fernández F,López-Contreras G,Mourão L,de Jesus K,de Jesus K,Zacca R,Vilas-Boas JP,Fernandes RJ,Arellano R

更新日期：2019-02-01 00:00:00

abstract：:The purpose of the present investigation was to identify muscle damage, inflammatory response and oxidative stress blood markers in athletes undertaking the ultra-endurance MultiSport Brazil race. Eleven well-trained male athletes (34.3 ± 3.1 years, 74.0 ± 7.6 kg; 172.2 ± 5.1 cm) participated in the study and performe...

journal_title：Journal of sports sciences

authors： de Lucas RD,Caputo F,Mendes de Souza K,Sigwalt AR,Ghisoni K,Lock Silveira PC,Remor AP,da Luz Scheffer D,Guglielmo LG,Latini A

更新日期：2014-01-01 00:00:00

abstract：:We aimed to compare differentiated training loads (TL) between fitness responders and non-responders to an eight-week pre-season training period in a squad of thirty-five professional rugby union players. Differential TL were calculated by multiplying player's perceptions of breathlessness (sRPE-B) and leg muscle exer...

journal_title：Journal of sports sciences

authors： McLaren SJ,Smith A,Bartlett JD,Spears IR,Weston M

更新日期：2018-11-01 00:00:00

abstract：:This study analysed whether a significant relationship exists between the torque and muscle thickness and pennation angle of the erector spinae muscle during a maximal isometric lumbar extension with the lumbar spine in neutral position. This was a cross-sectional study in which 46 healthy adults performed three repet...

journal_title：Journal of sports sciences

authors： Cuesta-Vargas A,González-Sánchez M

更新日期：2014-01-01 00:00:00

abstract：:Many of the factors identified as influencing the home advantage have an underlying social basis, presumably through the influence exerted by the home crowd. Beliefs in the home advantage and the causes of that advantage also have a social basis: sports coverage and fan discourse focus on some aspects of the phenomeno...

journal_title：Journal of sports sciences

authors： Smith DR

更新日期：2005-04-01 00:00:00

abstract：:There is a positive association between motor competence and physical activity in child populations. Little is known about the relative variance explained in physical activity when process- versus product-oriented approaches are used for evaluating motor competence. This study aimed to examine associations between pro...

journal_title：Journal of sports sciences

authors： Hulteen RM,True L,Pfeiffer KA

更新日期：2020-02-01 00:00:00

abstract：:Maximal strength, power, muscle cross-sectional area, maximal and submaximal cycling endurance characteristics and serum hormone concentrations of testosterone, free testosterone and cortisol were examined in three groups of men: weightlifters (n = 11), amateur road cyclists (n = 18) and age-matched controls (n = 12)....

journal_title：Journal of sports sciences

authors： Izquierdo M,Ibáñez J,Häkkinen K,Kraemer WJ,Ruesta M,Gorostiaga EM

更新日期：2004-05-01 00:00:00

abstract：:The aim of the current study was twofold: (1) to validate the use of action sport cameras for quantifying focus of visual attention in sailing and (2) to apply this method to examine whether an external focus of attention is associated with better performance in upwind sailing. To test the validity of this novel quant...

journal_title：Journal of sports sciences

authors： Pluijms JP,Cañal-Bruland R,Hoozemans MJ,Van Beek MW,Böcker K,Savelsbergh GJ

更新日期：2016-08-01 00:00:00

abstract：:The effect of alcohol ingestion before exercise on blood haemostasis is not known. The present study examined the effects of moderate alcohol ingestion on blood haemostatic variables at rest and in response to exercise. Eleven normal healthy individuals randomly performed two tests separated by 7 days. A moderate dose...

journal_title：Journal of sports sciences

authors： el-Sayed MS,Eastland P,Lin X,Rattu AM

更新日期：1999-06-01 00:00:00

abstract：:The aims of this study were to examine the changes in plasma concentrations of inflammatory cytokines induced by training and competition in professional cyclists. We report the serum concentrations of interleukin-6 (IL-6), tumour necrosis factor alpha (TNF-a), tumour necrosis factor receptors I and II (TNFR-I and -II...

journal_title：Journal of sports sciences

authors： Cordova A,Monserrat J,Villa G,Reyes E,Soto MA

更新日期：2006-06-01 00:00:00

abstract：:The present retrospective study intended to determine age, performance, the role of nationality and participation trends across calendar years in runners competing in "Comrades Marathon", the ultra-marathon with the longest tradition and the highest number of finishers worldwide. We analysed 235,467 finishers (40,211 ...

journal_title：Journal of sports sciences

authors： Nikolaidis PT,Knechtle B

更新日期：2019-06-01 00:00:00

abstract：:Oudejans, Bakker, and Beek (2007) recognize several relevant aspects of offside judgements in association football in the paper by Helsen, Gilis, and Weston (2006). We agree that the existing knowledge base on offside assessment needs to be expanded for two reasons. First, from a theoretical point of view it is import...

journal_title：Journal of sports sciences

authors： Helsen W,Gilis B,Weston M

更新日期：2007-07-01 00:00:00

abstract：:The purpose was to examine changes in the perceptual responses to lifting a very low load (15% one repetition maximum (1RM)) with and without (15/0) different pressures [40% (15/40) and 80% (15/80) arterial occlusion pressure] and compare that to traditional high load (70/0) resistance exercise. Ratings of perceived e...

journal_title：Journal of sports sciences

authors： Mattocks KT,Mouser JG,Jessee MB,Buckner SL,Dankel SJ,Bell ZW,Abe T,Bentley JP,Loenneke JP

更新日期：2019-08-01 00:00:00

abstract：:In this study, we examined (1) the relationship between self-talk and affect and (2) the nature of motivating self-talk. Ninety high-school athletes completed the Affect Grid and the Self-Talk Grid before practice and competition. Significant positive second-order partial correlations of low to moderate strength offer...

journal_title：Journal of sports sciences

authors： Hardy J,Hall CR,Alexander MR

更新日期：2001-07-01 00:00:00

abstract：:A comparison of the under-18 (U-18) and under-16 (U-16) squads of the Canadian national soccer team with a representative sample of Canadians (Canada Fitness Survey, 1983) showed a tendency for the development or selection of the older players in teams of stature (U-18, 175.8 cm; U-16, 171.1 cm; CFS, 170.9 cm) and lea...

journal_title：Journal of sports sciences

authors： Leatt P,Shephard RJ,Plyley MJ

更新日期：1987-07-01 00:00:00

abstract：:Maximal oxygen uptake VO(2max)) is considered the optimal method to assess aerobic fitness. The measurement of VO(2max), however, requires special equipment and training. Maximal exercise testing with determination of maximal power output offers a more simple approach. This study explores the relationship between [Vdo...

journal_title：Journal of sports sciences

authors： Dencker M,Thorsson O,Karlsson MK,Lindén C,Wollmer P,Andersen LB

更新日期：2008-11-01 00:00:00

abstract：:Heart rate (HR), when combined with accelerometry, can dramatically improve estimates of energy expenditure and sleep. Advancements in technology, via the development and introduction of small, low-cost photoplethysmography devices embedded within wrist-worn consumer wearables, have made the collection of heart rate (...

journal_title：Journal of sports sciences

authors： Zhang Y,Weaver RG,Armstrong B,Burkart S,Zhang S,Beets MW

更新日期：2020-09-01 00:00:00

abstract：:The behavioural modifications that accompany Ramadan intermittent fasting (RIF) are usually associated with some alterations in the metabolic, physiological, and psychological responses of athletes that may affect sport performance. Muslim athletes who are required to train and/or compete during the month-long, diurna...

journal_title：Journal of sports sciences

authors： Chaouachi A,Leiper JB,Chtourou H,Aziz AR,Chamari K

更新日期：2012-01-01 00:00:00