Abstract:
:The present study aimed to clarify the effects of oncoming target velocities on the ability of rapid force production and accuracy and variability of simultaneous control of both force production intensity and timing. Twenty male participants (age: 21.0 ± 1.4 years) performed rapid gripping with a handgrip dynamometer to coincide with the arrival of an oncoming target by using a horizontal electronic trackway. The oncoming target velocities were 4, 8, and 12 m · s-1, which were randomly produced. The grip force required was 30% of the maximal voluntary contraction. Although the peak force (Pf) and rate of force development (RFD) increased with increasing target velocity, the value of the RFD to Pf ratio was constant across the 3 target velocities. The accuracy of both force production intensity and timing decreased at higher target velocities. Moreover, the intrapersonal variability in temporal parameters was lower in the fast target velocity condition, but constant variability in 3 target velocities was observed in force intensity parameters. These results suggest that oncoming target velocity does not intrinsically affect the ability for rapid force production. However, the oncoming target velocity affects accuracy and variability of force production intensity and timing during rapid force production.
journal_name
J Sports Scijournal_title
Journal of sports sciencesauthors
Ohta Ydoi
10.1080/02640414.2016.1266017subject
Has Abstractpub_date
2017-12-01 00:00:00pages
2304-2312issue
23eissn
0264-0414issn
1466-447Xjournal_volume
35pub_type
杂志文章abstract::The training and competitive programmes of elite athletes incorporate travel schedules, often long journeys, across multiple time zones. In such cases, travel causes both transient fatigue and a malaise known as "jet-lag" that persists for some days. Jet-lag is due to the disturbance of the body's circadian rhythms: d...
journal_title:Journal of sports sciences
pub_type: 共识发展会议,指南,杂志文章,评审
doi:10.1080/02640410701607445
更新日期:2007-01-01 00:00:00
abstract::Previous research has highlighted the positive effect that different warm-up protocols have on golf performance (e.g. Sorbie et al., 2016; Tilley & Macfarlane, 2012) with the design of warm-ups and programmes targeting and improving golf performance through the activation and development of specific muscle groups. Thi...
journal_title:Journal of sports sciences
pub_type: 杂志文章,随机对照试验
doi:10.1080/02640414.2018.1522699
更新日期:2019-03-01 00:00:00
abstract::The purpose of this study was to examine the variation in accumulated basketball training experience, body size, functional performance, deliberate practice motivation, achievement and competitiveness motivation and sources of enjoyment among young female basketball players, partitioning the potential variation by ind...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2020.1736247
更新日期:2020-04-01 00:00:00
abstract::The aim of the present study was to assess the reliability and validity of the Newtest Powertimer 300-series portable contact mat and photocells (Newtest Oy, Finland). The participants were 20 male soccer players aged 19.1+/-3.5 years. The validity and reliability of the Powertimer (contact mat and photocells) were as...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640410802448723
更新日期:2009-01-01 00:00:00
abstract::We examined sexual dimorphism in the anthropometry of 68 Australasian and Pacific powerlifters (14 females, 54 males) who were competing in one of two national or international powerlifting competitions held in New Zealand. All powerlifters were assessed for 37 anthropometric dimensions by ISAK (International Society ...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640410701644034
更新日期:2008-03-01 00:00:00
abstract::The purpose of this study was to determine hip joint kinetics during a table tennis topspin forehand, and to investigate the relationship between the relevant kinematic and kinetic variables and the racket horizontal and vertical velocities at ball impact. Eighteen male advanced table tennis players hit cross-court to...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2017.1344777
更新日期:2018-04-01 00:00:00
abstract::This study investigated the influence of the regression model and initial intensity during an incremental test on the relationship between the lactate threshold estimated by the maximal-deviation method and performance in elite-standard runners. Twenty-three well-trained runners completed a discontinuous incremental r...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2013.862844
更新日期:2014-01-01 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
pub_type: 杂志文章
doi:10.1080/02640414.2019.1702279
更新日期:2020-02-01 00:00:00
abstract::We examined the effects of pre-exercise sodium bicarbonate (NaHCO3) ingestion on the slow component of oxygen uptake (VO2) kinetics in seven professional road cyclists during intense exercise. One hour after ingesting either a placebo or NaHCO3 (0.3 g x kg body mass(-1)), each cyclist (age, 25 +/- 2 years; VO2max, 74....
journal_title:Journal of sports sciences
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1080/0264041031000070949
更新日期:2003-01-01 00:00:00
abstract::The aim of this study was to assess fatigue during a simulated cross-country skiing sprint competition based on skating technique. Sixteen male skiers performed a 30-m maximal skiing speed test and four 850-m heats with roller skies on a tartan track, separated by 20 min recovery between heats. Physiological variables...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640410903081860
更新日期:2009-08-01 00:00:00
abstract::The purpose of this study was to examine oxygen consumption (VO(2)) during and after a single bout of low-intensity resistance exercise with slow movement. Eleven healthy men performed the following three types of circuit resistance exercise on separate days: (1) low-intensity resistance exercise with slow movement: 5...
journal_title:Journal of sports sciences
pub_type: 临床试验,杂志文章
doi:10.1080/02640414.2011.616950
更新日期:2012-01-01 00:00:00
abstract::The purpose of this study was to examine the accuracy of methods to estimate ball spin rate and spin axis direction using multi-camera tracking technology. The method implemented by Hawk-Eye and a theoretical ball trajectory model were assessed for their accuracy against high speed-vision. A theoretical ball trajector...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2019.1697189
更新日期:2020-02-01 00:00:00
abstract::The aims of this study were to compare the physiological and anthropometric characteristics of successful mountain bikers and professional road cyclists and to re-examine the power-to-weight characteristics of internationally competitive mountain bikers. Internationally competitive cyclists (seven mountain bikers and ...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/026404102321011760
更新日期:2002-12-01 00:00:00
abstract::The aims of this experiment were to determine whether there are differences between the sexes in the three-dimensional angular rotations of the lumbo-pelvic-hip complex during running and, if such differences exist, to establish whether factors other than sex can explain the observed differences. A cohort of 44 non-in...
journal_title:Journal of sports sciences
pub_type: 临床试验,杂志文章
doi:10.1080/0264041031000070859
更新日期:2003-02-01 00:00:00
abstract::This study was conducted to determine if the Polar FT40 could accurately track changes in maximal oxygen consumption (VO2max) in a group of female soccer players. Predicted VO2max (pVO2max) via the Polar FT40 and observed VO2max (aVO2max) from a maximal exercise test on a treadmill were determined for members of a col...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2013.879672
更新日期:2014-01-01 00:00:00
abstract::The aim of this study was to observe changes in the kinematics and muscle activities when barefoot running was initially adopted by six habitually shod, recreational rearfoot striking runners. Participants ran on a treadmill shod for 5 min, completed 3 × 10-min intervals of barefoot running and then completed a final ...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2015.1034756
更新日期:2016-01-01 00:00:00
abstract::This study aimed to investigate activation characteristics of the biceps femoris long head (BFlh) and semitendinosus (ST) muscles during the acceleration and maximum-speed phases of sprinting. Lower-extremity kinematics and electromyographic (EMG) activities of the BFlh and ST muscles were examined during the accelera...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2017.1375548
更新日期:2018-06-01 00:00:00
abstract::In this study, we investigated the effect of water immersion on physical test performance and perception of fatigue/recovery during a 4-day simulated soccer tournament. Twenty high-performance junior male soccer players (age 15.9 +/- 0.6 years) played four matches in 4 days and undertook either cold-water immersion (1...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640410802603855
更新日期:2009-04-01 00:00:00
abstract::Fundamental movement skills (FMS) are the basic building blocks of more advanced, complex movements required to participate in physical activity. This study examined FMS proficiency across the full range of Irish primary school children (n = 2098, 47% girls, age range 5-12 years). Participants were assessed using the ...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2019.1651144
更新日期:2019-11-01 00:00:00
abstract::This study aimed to evaluate the autonomic modulation of heart rate in sedentary paraplegics and paraplegic wheelchair basketball players with thoracic spinal cord injury below T6. Seven paraplegic wheelchair basketball players (active paraplegic group), five paraplegics who were not involved in regular exercise (sede...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2012.734917
更新日期:2013-01-01 00:00:00
abstract::Chronic fatigue in the athletic population is a common but difficult diagnostic challenge for the sports physician. While a degree of fatigue may be normal for any athlete during periods of high-volume training, the clinician must be able to differentiate between this physiological fatigue and more prolonged, severe f...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/026404197367353
更新日期:1997-06-01 00:00:00
abstract::Sport-specific resistance training, through limb loading, can be a complimentary training method to traditional resistance training by loading the working muscles during all phases of a specific movement. The purpose of this study was to examine the acute effects of skating with an additional load on the skate, using ...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2017.1407033
更新日期:2018-07-01 00:00:00
abstract::To characterize rugby union lineout throwing technique, three experienced male rugby players performed throwing trials under varying conditions of distance and trajectory. Motion analysis permitted the recovery of joint centre coordinates at 120 Hz and the construction of a three-dimensional linked segment model for c...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640410701885629
更新日期:2008-06-01 00:00:00
abstract::The aim of this study was to determine the match activity and physiological demands of women's tennis during a 3-day clay-court tennis tournament. The activity profile of eight players was determined by filming each competitive match with video cameras. Metabolic-perceptual measurements--blood samples and individual r...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640410802287089
更新日期:2008-12-01 00:00:00
abstract::Comprehension of a narrated diagram entail complex cognitive processing as learner is challenged to extract the orally evoked information. The present experiment examined the effects of 2 different forms of attention guidance - bottom-up and top-down - on comprehension performance, cognitive load investment, and motiv...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2016.1218034
更新日期:2017-06-01 00:00:00
abstract::The quadruple approach in the title refers to four different studies over a period of 3 years. The common factor in these studies is the methodology of the (Brussels) Electromyographic Signal Processing and Analysis System (ESPAS), a hardware and software EMG data acquisition system that has constantly been improved. ...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640419008732149
更新日期:1990-01-01 00:00:00
abstract::The purpose of this study was to provide electromyographic feedback for (1) pedagogical advice in motor learning, (2) the ergonomics of materials choice and (3) competition. For these purposes: (1) EMG data were collected for the Stem Christie, the Stem Turn and the Parallel Christie (three basic ski initiation drills...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640419408732169
更新日期:1994-06-01 00:00:00
abstract::While sport science can have significant and positive impact on coaches and athletes, there is still a general consensus that the transfer of sport science knowledge to coaching is poor. Given this apparent dilemma, this study investigated the perceptions of sport science from coaches across four different sports (foo...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2012.754924
更新日期:2013-01-01 00:00:00
abstract::The relationship between external training load and session rating of perceived exertion (s-RPE) training load and the impact that playing experience, playing position and 2-km time-trial performance had on s-RPE training load were explored. From 39 Australian Football players, 6.9 ± 4.6 training sessions were analyse...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2014.947311
更新日期:2015-01-01 00:00:00
abstract::The birth date distributions of elite male and female footballers in Australia, from junior youth (age 14 and upwards) to senior (professional) players, were examined. A statistically significant relative age effect was found among junior male players, reducing in effect with increasing age. An inter-year relative age...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2012.707329
更新日期:2012-01-01 00:00:00