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 free-living (criterion measure of activity intensity) while wearing ActiGraph GT9X Link accelerometers on the right hip and non-dominant wrist. All laboratory data (n = 36) and 11 participants' free-living data were used to develop vector magnitude count cut-points (counts/min) for activity intensity for the wrist-worn accelerometer, and 12 participants' free-living data were used to cross-validate cut-point accuracy. The cut-points were: <2,860 counts/min (sedentary); 2,860-3,940 counts/min (light); and ≥3,941counts/min (moderate-to-vigorous (MVPA)). These cut-points had an accuracy of 70.8% for assessing free-living activity intensity, whereas Sasaki/Freedson cut-points for the hip accelerometer had an accuracy of 77.1%, and Hildebrand Euclidean Norm Minus One (ENMO) cut-points for the wrist accelerometer had an accuracy of 75.2%. While accuracy was higher for a hip-worn accelerometer and for ENMO wrist cut-points, the high wear compliance of wrist accelerometers shown in past work and the ease of use of count-based analysis methods may justify use of these developed cut-points until more accurate, equally usable methods can be developed.
journal_name
J Sports Scijournal_title
Journal of sports sciencesauthors
Montoye AHK,Clevenger KA,Pfeiffer KA,Nelson MB,Bock JM,Imboden MT,Kaminsky LAdoi
10.1080/02640414.2020.1794244subject
Has Abstractpub_date
2020-11-01 00:00:00pages
2569-2578issue
22eissn
0264-0414issn
1466-447Xjournal_volume
38pub_type
杂志文章abstract::The aim of this study was to explore the relationships between dimensions of social support and components of performance in tennis. A post-match performance measure was completed by 144 British tournament tennis players. Principal components analysis yielded eight components, labelled Execution of (Flexible) Plan, Lo...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/026404199365948
更新日期:1999-05-01 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::The feasibility requirements of administering field-based cognitive assessments are rarely reported. We examined the feasibility of administering a group-based cognitive test battery in a school setting with older adolescents. Several types of reliability were also assessed in the control group. Preliminary efficacy a...
journal_title:Journal of sports sciences
pub_type: 杂志文章,随机对照试验
doi:10.1080/02640414.2020.1756673
更新日期:2020-08-01 00:00:00
abstract::This study involved a systematic video analysis of 16 anterior cruciate ligament (ACL) injuries sustained by elite-level netball players during televised games in order to describe the game situation, the movement patterns involved, the player's behaviour, and a potential injury mechanism. Eight of the ACL injuries we...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2015.1121285
更新日期:2016-08-01 00:00:00
abstract::The literature related to Borg's ratings of perceived exertion (RPE) scale has revealed inconsistencies about the strength of the relationship between ratings of perceived exertion and various physiological criterion measures, such as heart rate, blood lactate concentration, percent maximal oxygen uptake (%VO2max), ox...
journal_title:Journal of sports sciences
pub_type: 杂志文章,meta分析
doi:10.1080/026404102320761787
更新日期:2002-11-01 00:00:00
abstract::In an effort to evaluate the mechanisms underpinning performance in alpine ski racing, researchers have focused on the predictive validity of measures derived from fitness assessments. However, a limitation of this literature is the absence of practice time, since prolonged training may naturally develop specific fitn...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2020.1823088
更新日期:2020-09-20 00:00:00
abstract::This study aimed to verify the effect of a multicomponent intervention on cardiometabolic risk factors (CMRF), and to determine the prevalence of responders on CMRF among children and adolescents with overweight/obesity. This is a quasi-experimental study, developed with 35 children and adolescents with overweight/obe...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2020.1725384
更新日期:2020-03-01 00:00:00
abstract::Adherence is a key implementation outcome that determines the effectiveness of an intervention. This study, an observational design involving coaches and players from 33 high school basketball teams, evaluated the dimensions of adherence to a basketball-specific neuromuscular training (NMT) warm-up program in youth ba...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2020.1782578
更新日期:2020-10-01 00:00:00
abstract::In this study, we found that the optimum take-off angle for a long jumper may be predicted by combining the equation for the range of a projectile in free flight with the measured relations between take-off speed, take-off height and take-off angle for the athlete. The prediction method was evaluated using video measu...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640410400022011
更新日期:2005-07-01 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::The prevalence of ischaemia-related symptoms is remarkably high among elite indoor volleyball players. Since the exposure to sport-specific demands may be higher in beach volleyball compared to indoor volleyball, the aim of this study was to assess the prevalence of ischaemia-related symptoms and associated risk facto...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2015.1093649
更新日期:2016-01-01 00:00:00
abstract::Low-intensity exercise with blood flow restriction (BFR) is an increasingly common method of improving muscular strength and hypertrophy, and improving aerobic fitness, in clinical and athletic populations. The aim of this systematic review was to describe common approaches to determining occlusion pressures for BFR e...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2020.1840734
更新日期:2020-11-01 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::This study examines the association between prolonged sedentary time and breaks in sedentary time with cardiometabolic risk in 10-14-year-old children. This cross-sectional design study analysed accelerometry-determined sedentary behaviour and physical activity collected over 7 days from 111 (66 girls) UK schoolchildr...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2016.1260150
更新日期:2017-11-01 00:00:00
abstract::In this study, we examined the visual search strategies used during observation of video and point-light display models. We also assessed the relative effectiveness of video and point-light models in facilitating the learning of task outcomes and movement patterns. Twenty-one female novice soccer players were divided ...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/026404102317284808
更新日期:2002-03-01 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::Childhood sport participation is argued to be important to understand differences in self-regulation and performance level in adolescence. This study sought to investigate if football-specific activities in childhood (6-12 years of age) is related to self-regulatory skills and national under 14- and 15-team selection ...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2018.1449563
更新日期:2018-10-01 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
pub_type: 杂志文章
doi:10.1080/02640410802123177
更新日期:2008-10-01 00:00:00
abstract::Generally, swimmers pace themselves using their own judgement and the poolside clock during swimming training, fitness testing protocols or scientific investigation. The Aquapacer is a new pacing device that can be used to pace the swimming speed or stroke rate of the swimmer. The aims of this study were to determine ...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/026404102760000044
更新日期:2002-07-01 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 purpose of the study was to examine the health effects of 8 weeks of recreational badminton in untrained women. Participants were matched for maximal oxygen uptake (V̇O2max) and body fat percentage and assigned to either a badminton (n = 14), running (n = 14) or control group (n = 8). Assessments were conducted pr...
journal_title:Journal of sports sciences
pub_type: 杂志文章,随机对照试验
doi:10.1080/02640414.2016.1210819
更新日期:2017-06-01 00:00:00
abstract::Cross-country skiing is a complex endurance sport requiring technical skills, in addition to considerable physiological and tactical abilities. This review aims to identify biomechanical factors that influence the performance of cross-country skiers. Four electronic databases were searched systematically for original ...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2020.1775375
更新日期:2020-09-01 00:00:00
abstract::The purpose of this study was to test the hypothesis that increased availability of blood-borne glucose would improve endurance after carbohydrate loading. A single-leg exercise model was employed, taking advantage of the fact that supercompensation of muscle glycogen occurs only in a previously exercised limb. Endura...
journal_title:Journal of sports sciences
pub_type: 杂志文章,评审
doi:10.1080/02640418908729831
更新日期:1989-07-01 00:00:00
abstract::Organisational stressors are associated with positive and negative outcomes in extant literature; however, little is known about which demands predict which outcomes. Extant theory and literature also suggests that coping style may influence an individual's resilience or vulnerability to stressors and, subsequently, t...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2016.1184299
更新日期:2017-04-01 00:00:00
abstract::This study aims to assess fundamental movement skill (FMS) proficiency, physical self-confidence levels, and the relationship between these variables and gender differences among adolescents. Three hundred and ninety five adolescents aged 13.78 years (SD = ±1.2) from 20 schools were involved in this study. The Test of...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2016.1235280
更新日期:2017-09-01 00:00:00
abstract::The purpose of this study was to determine the effects of training on the force-, velocity-, and displacement-time curves using principal component analysis (PCA) to examine the pre to post intervention changes. Thirty-four trained women basketball players were randomly divided into training and control groups. The tr...
journal_title:Journal of sports sciences
pub_type: 杂志文章,随机对照试验
doi:10.1080/02640414.2018.1504602
更新日期:2019-02-01 00:00:00
abstract::Deci and Ryan's causality orientations theory suggests that there are individual differences in motivational orientation towards initiating and regulating behaviour. They described three causality orientations: autonomy, control and impersonal. The aim of this paper is to describe the development and concurrent validi...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/026404101300149393
更新日期:2001-06-01 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
pub_type: 杂志文章
doi:10.1080/02640414.2017.1409607
更新日期:2018-07-01 00:00:00
abstract::The pre-event warm-up or "priming" routine for optimising cycling performance is not well-defined or uniform to a specific event. We aimed to determine the effects of varying the intensity of priming on 3 km cycling performance. Ten endurance-trained male cyclists completed four 3 km time-trials (TT) on four separate ...
journal_title:Journal of sports sciences
pub_type: 杂志文章,随机对照试验
doi:10.1080/02640414.2014.960882
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