Psychological stress in sports coaches: a review of concepts, research, and practice.

abstract：:This study aimed to compare the load-velocity and load-power relationships of three common variations of the squat exercise. 52 strength-trained males performed a progressive loading test up to the one-repetition maximum (1RM) in the full (F-SQ), parallel (P-SQ) and half (H-SQ) squat, conducted in random order on sepa...

journal_title：Journal of sports sciences

authors： Martínez-Cava A,Morán-Navarro R,Sánchez-Medina L,González-Badillo JJ,Pallarés JG

更新日期：2019-05-01 00:00:00

abstract：:To observe the associations between single nucleotide polymorphisms (SNPs) of nicotinamide N-methyltransferase (NNMT) gene and sport performance and to analyse genotype associations of the associated SNPs with sport performance and relative maximal oxygen uptake ([Formula: see text]). Participants were selected from 6...

journal_title：Journal of sports sciences

authors： Li JH,Chen W,Zhu XJ,Lin YJ,Qiu LQ,Cai CX,Wang YH,Xiong Q,Chen F,Chen LH

更新日期：2017-11-01 00:00:00

abstract：:The aim of this study was to determine the effects of frequency of verbal encouragement during maximal exercise testing. Twenty-eight participants (12 males, 16 females) aged 20.9 +/- 1.5 years (mean +/- s) performed a maximal exercise test (VO2max) on a treadmill without any verbal encouragement. The participants wer...

journal_title：Journal of sports sciences

authors： Andreacci JL,LeMura LM,Cohen SL,Urbansky EA,Chelland SA,Von Duvillard SP

更新日期：2002-04-01 00:00:00

abstract：:The aim of this study was to examine the occurrence of the sticking region by examining how three different grip widths affect the sticking region in powerlifters' bench press performance. It was hypothesised that the sticking region would occur at the same joint angle of the elbow and shoulder independent of grip wid...

journal_title：Journal of sports sciences

authors： Gomo O,Van Den Tillaar R

更新日期：2016-01-01 00:00:00

abstract：:The aim of this study was to assess isokinetic torque, work and power between non-injured, ACL (anterior cruciate ligament)-deficient and ACL-reconstructed individuals. Ten healthy, non-injured individuals, seven unilateral ACL-deficient individuals and six unilateral ACL-reconstructed individuals were assessed for is...

journal_title：Journal of sports sciences

authors： Pincivero DM,Heller BM,Hou SI

更新日期：2002-09-01 00:00:00

abstract：:The purpose of this study was to determine whether there are differences in the perceived comfort, plantar pressure, and rearfoot motion between laced running shoes and elastic-covered running shoes. Fifteen male amateur runners participated in the study. Each participant was assigned laced running shoes and elastic-c...

journal_title：Journal of sports sciences

authors： Hong Y,Wang L,Li JX,Zhou JH

更新日期：2011-02-01 00:00:00

abstract：:The aim of this study was to examine the effect of concentric warm-up exercise on eccentrically induced changes in muscle strength, range of motion, and soreness of the elbow flexors. Ten resistance-exercise naive participants performed intermittent incremental eccentric actions (42 in total) of the elbow flexor muscl...

journal_title：Journal of sports sciences

authors： Ingham SA,van Someren KA,Howatson G

更新日期：2010-11-01 00:00:00

abstract：:Children's fundamental movement skill levels (FMS) predict moderate-to-vigorous physical activity (MVPA). Asian children have been reported as less active than English-Europeans, possibly due to poorer skills. This study compared the FMS of children from Culturally and Linguistically Diverse (CALD) backgrounds and exa...

journal_title：Journal of sports sciences

authors： Barnett LM,Telford RM,Strugnell C,Rudd J,Olive LS,Telford RD

更新日期：2019-03-01 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：:The aim of the present study was to describe the frequency, duration, and nature of repeated high-intensity exercise in Super 14 rugby union. Time-motion analysis was used during seven competition matches over the 2008 and 2009 Super 14 seasons; five players from each of four positional groups (front row forwards, bac...

journal_title：Journal of sports sciences

authors： Austin D,Gabbett T,Jenkins D

更新日期：2011-07-01 00:00:00

abstract：:While empirical evidence suggests that elite athletes have superior lifespan outcomes relative to the general population, less is known regarding their causes of death. The purpose of this study was to critically examine the mortality outcomes of deceased National Basketball Association and American Basketball Associa...

journal_title：Journal of sports sciences

authors： Lemez S,Wattie N,Lawler T,Baker J

更新日期：2018-07-01 00:00:00

abstract：:The purpose of this study was to capture the lower limb kinematics before during and after ball impact of soccer kicking by examining the influence of both sampling rate and smoothing procedures. Nine male soccer players performed maximal instep kicks and the three-dimensional leg movements were captured at 1000 Hz. A...

journal_title：Journal of sports sciences

authors： Nunome H,Lake M,Georgakis A,Stergioulas LK

更新日期：2006-01-01 00:00:00

abstract：:This paper addresses the potential role of fatigue as a factor contributing to the deterioration of high level performance in ice hockey. Particularly, attention is given to the general description of different types of fatigue and the mechanisms underlying each type. Data have been presented illustrating the nature a...

journal_title：Journal of sports sciences

authors： Green HJ

更新日期：1987-01-01 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：:Youth athletes are known to be at high risk of musculoskeletal (MSK) injuries. Children in developed countries are increasingly adopting a sedentary lifestyle. Although some risk factors related to sports activities have been reported, the effect of lifestyle (i.e. screen time behaviour) on MSK pain in youth athletes ...

journal_title：Journal of sports sciences

authors： Sekiguchi T,Hagiwara Y,Momma H,Tsuchiya M,Kuroki K,Kanazawa K,Yabe Y,Yoshida S,Koide M,Itaya N,Itoi E,Nagatomi R

更新日期：2018-08-01 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：:Training consisting of numerous repetitions performed as closely as possible to ideal techniques is common in sports and every-day tasks. Little is known about fatigue-related technique changes that emerge at different timescales when repeating complex actions such as a karate front kick. Accordingly, 15 karatekas per...

journal_title：Journal of sports sciences

authors： Aragonés D,Eekhoff A,Horst F,Schöllhorn WI

更新日期：2018-06-01 00:00:00

abstract：:This study sought to determine the association of relative age and performance of young elite basketball players. The distribution of the birth dates, heights, positions, classification and performance of the male and female participants (n = 2395) of the U16, U18 and U20 European Basketball Championships were analyse...

journal_title：Journal of sports sciences

authors： Arrieta H,Torres-Unda J,Gil SM,Irazusta J

更新日期：2016-08-01 00:00:00

abstract：:In the present study, we examine specifically how the sensory conditions available during physical practice of a task might influence the subsequent use of motor imagery. First, as a pre-test, participants had to physically reproduce knee joint positions with or without vision. Second, they practised motor imagery (15...

journal_title：Journal of sports sciences

authors： Toussaint L,Blandin Y

更新日期：2010-03-01 00:00:00

abstract：:Anterior cruciate ligament (ACL) rupture, during ski-landing, is caused by excessive knee joint forces and kinematics, like anterior tibial translation, internal tibial rotation, and valgus rotation. It is not well understood how these forces/kinematics are directly related to ski-landing impact. In the present study,...

journal_title：Journal of sports sciences

authors： Yeow CH,Kong CY,Lee PV,Goh JC

更新日期：2011-08-01 00:00:00

abstract：:The aim of this study was to evaluate physiological and technical attributes of prepubertal soccer players during multiple small-sided games (SSGs), and determine if SSGs can act as a talent identification tool. Sixteen highly trained U10 soccer players participated and separated into two groups of eight. Each group p...

journal_title：Journal of sports sciences

authors： Fenner JS,Iga J,Unnithan V

更新日期：2016-10-01 00:00:00

abstract：:When analysing physical activity (PA) levels using accelerometry, the epoch setting is critical to capture intensity-specific PA correctly. The aim of the present study was to investigate the PA intensity signatures related to metabolic health in children using different epoch settings. A sample of 841 Norwegian child...

journal_title：Journal of sports sciences

authors： Aadland E,Andersen LB,Anderssen SA,Resaland GK,Kvalheim OM

更新日期：2020-02-01 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：:This study investigated the effects of two different doses of caffeine on endurance cycle time trial performance in male athletes. Using a randomised, placebo-controlled, double-blind crossover study design, sixteen well-trained and familiarised male cyclists (Mean ± s: Age = 32.6 ± 8.3 years; Body mass = 78.5 ± 6.0 k...

journal_title：Journal of sports sciences

authors： Desbrow B,Biddulph C,Devlin B,Grant GD,Anoopkumar-Dukie S,Leveritt MD

更新日期：2012-01-01 00:00:00

abstract：:Low back pain (LBP) is a common problem in football (soccer) players. The effect of LBP on the trunk and hip muscles in this group is unknown. The relationship between LBP and trunk muscle size and function in football players across the preseason was examined. A secondary aim was to assess hip muscle strength. Twenty...

journal_title：Journal of sports sciences

authors： Hides JA,Oostenbroek T,Franettovich Smith MM,Mendis MD

更新日期：2016-12-01 00:00:00

abstract：:Using a randomised cross-over design, free-living lunch intake and subjective appetite were examined in 10 children (9.8 ± 0.6 years) following high-intensity interval training (HIIT) versus a control sedentary (SED) period, within a school setting. The 22-min HIIT took place during a regular PE lesson and consisted o...

journal_title：Journal of sports sciences

authors： Morris A,Cramb R,Dodd-Reynolds CJ

更新日期：2018-02-01 00:00:00

abstract：:Stand-up paddle boarding (SUP) is a rapidly growing activity where only anecdotal evidence exists for its proposed health and fitness benefits. The purpose of this study was to profile elite and recreational SUP with respect to anthropometric, physiological and musculoskeletal measurements. A total of 30 SUP participa...

journal_title：Journal of sports sciences

authors： Schram B,Hing W,Climstein M

更新日期：2016-01-01 00:00:00

abstract：:The aim of this study was to examine the influence of maturity status on primary school children's physical activity and physical self-perceptions. Altogether, 175 children (97 girls, 78 boys) aged 10.6 +/- 0.3 years completed the Children and Youth Physical Self-Perception Profile and wore an ActiGraph accelerometer ...

journal_title：Journal of sports sciences

authors： Fairclough SJ,Ridgers ND

更新日期：2010-01-01 00:00:00

abstract：:Laboratory-based studies indicate mild dehydration adversely affects mood. Although ultra-endurance events often result in mild to moderate dehydration, little research has evaluated whether the relationship between hydration status and mood state also exists in these arduous events. Therefore, the purpose of this stu...

journal_title：Journal of sports sciences

authors： Moyen NE,Ganio MS,Wiersma LD,Kavouras SA,Gray M,McDermott BP,Adams JD,Binns AP,Judelson DA,McKenzie AL,Johnson EC,Muñoz CX,Kunces LJ,Armstrong LE

更新日期：2015-01-01 00:00:00

abstract：:We propose a new method, based on inertial sensors, to automatically measure at high frequency the durations of the main phases of ski jumping (i.e. take-off release, take-off, and early flight). The kinematics of the ski jumping movement were recorded by four inertial sensors, attached to the thigh and shank of junio...

journal_title：Journal of sports sciences

authors： Chardonnens J,Favre J,Le Callennec B,Cuendet F,Gremion G,Aminian K

更新日期：2012-01-01 00:00:00