Abstract:
:To determine the effect of circadian rhythm on neuromuscular responses and kinematics related to physical tennis performance, after a standardised warm-up, 13 highly competitive male tennis players were tested twice for serve velocity/accuracy (SVA), countermovement vertical jump (CMJ), isometric handgrip strength (IS), agility T-test (AGIL) and a 10-m sprint (10-m RUN). In a randomised, counter-balance order, tennis players underwent the test battery twice, either in the morning (i.e., AM; 9:00 h) and in the afternoon (i.e., PM; 16:30 h). Paired t-tests were used to analyse differences due to time-of-day in performance variables. Comparison of morning versus afternoon testing revealed that SVA (168.5 ± 6.5 vs. 175.2 ± 6.1 km · h-1; P = 0.003; effect size [ES] = 1.07), CMJ (32.2 ± 0.9 vs. 33.7 ± 1.1 cm; P = 0.018; ES = 1.46), AGIL (10.14 ± 0.1 vs. 9.91 ± 0.2 s; P = 0.007; ES = 1.23) and 10-m RUN time (1.74 ± 0.1 vs. 1.69 ± 0.1 s; P = 0.021; ES = 0.67) were significantly blunted during the morning testing. However, IS was not affected by time-of-day (P = 0.891). Thus, tennis performance may be reduced when competing in the morning in comparison to early evening. Therefore, coaches and tennis players should focus on schedule the SVA, power, speed and agility training sessions in the afternoon.
journal_name
J Sports Scijournal_title
Journal of sports sciencesauthors
López-Samanes Á,Moreno-Pérez D,Maté-Muñoz JL,Domínguez R,Pallarés JG,Mora-Rodriguez R,Ortega JFdoi
10.1080/02640414.2016.1258481subject
Has Abstractpub_date
2017-11-01 00:00:00pages
2121-2128issue
21eissn
0264-0414issn
1466-447Xjournal_volume
35pub_type
杂志文章,随机对照试验abstract::The mixture of dihydroxyacetone and pyruvate (DHAP) is an ergogenic aid that enhances muscle glucose extraction during prolonged aerobic exercise. In order to evaluate the effect of DHAP on muscle amino acid extraction during exercise, we measured arterial concentration and muscle exchange of amino acids in 18 untrain...
journal_title:Journal of sports sciences
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1080/02640419308729958
更新日期:1993-02-01 00:00:00
abstract::This study examined the changes in running performance, maximal blood lactate concentrations and running kinematics between 85%BM anti-gravity (AG) running and normal over-ground (OG) running over an 8-week training period. Fifteen elite male developmental cricketers were assigned to either the AG or over-ground (CON)...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2018.1449092
更新日期:2018-10-01 00:00:00
abstract::The aim of this study was to determine whether 3 weeks of intermittent normobaric hypoxic exposure at rest was able to elicit changes that would benefit multi-sport athletes. Twenty-two multi-sport athletes of mixed ability were exposed to either a normobaric hypoxic gas (intermittent hypoxic training group) or a plac...
journal_title:Journal of sports sciences
pub_type: 杂志文章,随机对照试验
doi:10.1080/02640410600718129
更新日期:2007-02-15 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
pub_type: 杂志文章
doi:10.1080/02640419008732141
更新日期:1990-07-01 00:00:00
abstract::Comfort is important for running shoe prescription in athletes to enhance performance and potentially decrease injury risk. A three-stage process was used to develop a new running footwear comfort assessment tool (RUN-CAT): (i) a survey of 282 runners to identify meaningful items of comfort, (ii-a) field testing of 10...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2020.1773613
更新日期:2020-09-01 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
pub_type: 杂志文章
doi:10.1080/02640414.2018.1505183
更新日期:2019-02-01 00:00:00
abstract::This study investigated the effect of self-reported tolerance of the intensity of exercise on affective responses to, self-efficacy for and intention to repeat low-volume high-intensity interval exercise (HIIE). Thirty-six healthy participants (mean age 21 ± 2 years) were split into high tolerance (HT; n = 19), low to...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2019.1570590
更新日期:2019-07-01 00:00:00
abstract::This study examined the relationship between sit-to-stand (STS) power and physical function in adults with severe obesity. Thirty-eight adults (age: 44 ± 12 years; body mass index [BMI]: 45.2 ± 7.8 kg/m2) completed evaluations of STS power, strength and functional performance. STS power was measured with a wearable in...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2018.1553500
更新日期:2019-06-01 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
pub_type: 杂志文章
doi:10.1080/02640410903334780
更新日期:2010-01-01 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
pub_type: 杂志文章,随机对照试验
doi:10.1080/02640414.2011.624538
更新日期:2012-01-01 00:00:00
abstract::The purpose of this study was to determine the effects of the simultaneous use of pyridoxine-alpha-ketoglutarate (PAK) and sodium bicarbonate (NaHCO3) on short-term maximal exercise capacity in eight well-trained male cyclists. The study consisted of the determination of maximal power output and the administration of ...
journal_title:Journal of sports sciences
pub_type: 临床试验,杂志文章
doi:10.1080/02640419208729923
更新日期:1992-06-01 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::To examine the activity profile and physiological demands of top-class soccer refereeing, we performed computerized time-motion analyses and measured the heart rate and blood lactate concentration of 27 referees during 43 competitive matches in the two top Danish leagues. To relate match performance to physical capaci...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/026404101753113831
更新日期:2001-11-01 00:00:00
abstract::Thai ginseng, Kaempferia parviflora, is widely believed among the Mong hill tribe to reduce perceived effort and improve physical work capacity. Kaempferia parviflora is consumed before their daily work. Therefore, we conducted an acute study on the effects of K. parviflora on repeated bouts of sprint exercise and on ...
journal_title:Journal of sports sciences
pub_type: 杂志文章,随机对照试验
doi:10.1080/02640414.2010.506221
更新日期:2010-09-01 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
pub_type: 杂志文章
doi:10.1080/02640414.2012.753155
更新日期:2013-01-01 00:00:00
abstract::Despite recent popularity of wrist-worn accelerometers for assessing free-living physical behaviours, there is a lack of user-friendly methods to characterize physical activity from a wrist-worn ActiGraph accelerometer. Participants in this study completed a laboratory protocol and/or 3-8 hours of directly observed fr...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2020.1794244
更新日期:2020-11-01 00:00:00
abstract::Young soccer players often use one particular dominant leg (DL) to perform dynamic movements which require strength, resulting in leg asymmetry. The aim of this study was to compare, in young soccer players, the effect of using DL and non-dominant leg (NDL) on time performance of two change of direction (COD) manoeuvr...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2015.1129432
更新日期:2016-01-01 00:00:00
abstract::The purpose of this paper was to systematically review the literature and examine the research methodological quality, measurement properties and feasibility of the Loughborough Soccer Passing Test (LSPT). Databases were searched up to June 2017. Twenty five studies fulfilled the eligibility criteria. The main methodo...
journal_title:Journal of sports sciences
pub_type: 杂志文章,评审
doi:10.1080/02640414.2017.1409611
更新日期:2018-08-01 00:00:00
abstract::The use of dietary supplements is widespread in sport and most athletes competing at the highest level of competition use some form of dietary supplementation. Many of these supplements confer no performance or health benefit, and some may actually be detrimental to both performance and health when taken in high doses...
journal_title:Journal of sports sciences
pub_type: 杂志文章,评审
doi:10.1080/02640410400023258
更新日期:2005-09-01 00:00:00
abstract::The purpose of this study was to examine the effect of aerobic and strength conditioning on pain tolerance, pain appraisal and mood as a function of upper and lower limb pain location. Unfit males (n = 48) were randomly assigned to one of four groups: aerobic training, strength training, combined aerobic and strength ...
journal_title:Journal of sports sciences
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1080/02640419408732204
更新日期:1994-12-01 00:00:00
abstract::The spirit of sport, which encompasses intrinsic values associated with sport participation, is core to the World Anti-Doping Agency's (WADA) strategy for doping prevention. The contribution of these values to clean sport has yet to be established. In this study, athletes rated the importance of spirit of sport values...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2020.1835221
更新日期:2020-10-22 00:00:00
abstract::This study investigated differences in lower-limb coordination and coordination variability between experienced and novice runners during a prolonged run. Thirty-four participants were categorised as either experienced (n = 17) or novice runners (n = 17). All participants performed a 31-min treadmill run at their indi...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2018.1539294
更新日期:2019-05-01 00:00:00
abstract::In order to determine the role of body build characteristics in modern pentathletes, 65 female participants at the IXth World Modern Pentathlon Championships, 1989 (Wiener Neustadt, Austria) were investigated. Of these, 54 participate in the competition; the other 11 were reserves. Their mean (+/- S.D.) age was 22.34 ...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640419408732186
更新日期:1994-08-01 00:00:00
abstract::The aims of this study were to determine the influence of an 8-over spell on cricket fast bowling technique and performance (speed and accuracy), and to establish the relationship of selected physical capacities with technique and performance during an 8-over spell. Fourteen first-grade fast bowlers with a mean age of...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/026404100446801
更新日期:2000-12-01 00:00:00
abstract::Muscle injuries are frequent and represent one of the most substantial medical problems in professional football. They can have both traumatic and overuse causes with direct practical consequence due to differences in terms of the post-primary care regimen and prognosis. An accurate diagnosis is the first step towards...
journal_title:Journal of sports sciences
pub_type: 杂志文章,评审
doi:10.1080/02640414.2016.1252849
更新日期:2016-12-01 00:00:00
abstract::Two studies investigated the structure of different athlete leadership networks and its relationship to cohesion using social network analysis. In Study 1, we examined the relationship between a general leadership quality network and task and social cohesion as measured by the Group Environment Questionnaire (GEQ). In...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2016.1150601
更新日期:2016-11-01 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::In this article, we examine the question of what information is processed during observational learning by evaluating a variety of methods, theories, and empirical data. Initially, we review work involving neuroimaging techniques and infant imitation. We then evaluate data from behavioural experiments involving adults...
journal_title:Journal of sports sciences
pub_type: 杂志文章,评审
doi:10.1080/02640410600946860
更新日期:2007-03-01 00:00:00
abstract::In the collision between a striking implement and ball, the term "sweet spot" represents the impact location producing best results. In football kicking, it is not known if a sweet spot exists on the foot because no method to measure impact location in three-dimensional space exists. Therefore, the aims were: (1) deve...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2018.1505408
更新日期:2019-02-01 00:00:00
abstract::Muscle imbalance and deficit are key parameters for guiding rehabilitation and sports sessions and avoiding injuries. However, the high cost and non-portable nature of most instruments employed for muscle strength assessment frequently hamper an affordable evaluation in field conditions. This study evaluated the valid...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2019.1594570
更新日期:2019-08-01 00:00:00