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 fatigue which may be due to a pathological condition. As chronic fatigue can be the presenting symptom of many curable and harmful diseases, medical conditions which cause chronic fatigue have to be excluded. The clinician must then be able to differentiate between chronic fatigue associated with training or chronic fatigue from other medical causes, and also between the chronic fatigue syndrome and the overtraining syndrome. Once the clinician has excluded all of the above medical conditions which cause chronic fatigue in athletes, a significant proportion of fatigued athletes remain without a diagnosis. Novel data indicate that skeletal muscle disorders may play a role in the development of symptoms experienced by the athlete with chronic fatigue. The histological findings from muscle biopsies of athletes suffering from the 'fatigued athlete myopathic syndrome' are presented. We have designed a clinical approach to the diagnosis and work-up of the athlete presenting with chronic fatigue. The strength of this approach is that it hinges on the participation of a multidisciplinary team in the diagnosis and management of the athlete with chronic fatigue. The athlete, coach, dietician, exercise physiologist and sport psychologist all play an important role in enabling the physician to make the correct diagnosis.
journal_name
J Sports Scijournal_title
Journal of sports sciencesauthors
Derman W,Schwellnus MP,Lambert MI,Emms M,Sinclair-Smith C,Kirby P,Noakes TDdoi
10.1080/026404197367353subject
Has Abstractpub_date
1997-06-01 00:00:00pages
341-51issue
3eissn
0264-0414issn
1466-447Xjournal_volume
15pub_type
杂志文章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：:Decision-making is a central component of the in-game performance of Australian football umpires; however, current umpire training focuses largely on physiological development with decision-making skills development conducted via explicit lecture-style meetings with limited practice devoted to making actual decisions....
journal_title：Journal of sports sciences
pub_type： 杂志文章
doi：10.1080/02640414.2017.1298827
更新日期：2018-02-01 00:00:00
abstract：:Drag is the resistant force that opposes a swimmer displacing through water and significantly affects swimming performance. Drag experienced during active swimming is called active drag (Da), and its direct determination is still controversial. By contrast, drag experienced while gliding in a stable streamlined body p...
journal_title：Journal of sports sciences
pub_type： 杂志文章,评审
doi：10.1080/02640414.2018.1547099
更新日期：2019-05-01 00:00:00
abstract：:In 19 elite schoolboy rowers, the relationships between anthropometric characteristics, metabolic parameters, strength variables and 2000-m rowing ergometer performance time were analysed to test the hypothesis that a combination of these variables would predict performance better than either individual variables or o...
journal_title：Journal of sports sciences
pub_type： 杂志文章
doi：10.1080/026404198366380
更新日期：1998-11-01 00:00:00
abstract：:Bioelectrical impedance spectroscopy (BIS) provides an affordable and practical assessment of fat-free mass (FFM). However, little information is available on the assessment of changes in fat-free mass in top-level athletes using BIS. The aim of this study was to examine the accuracy of BIS in tracking changes in fat-...
journal_title：Journal of sports sciences
pub_type： 杂志文章
doi：10.1080/02640414.2012.692481
更新日期：2012-01-01 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：:Recent research has challenged the typical pre-match and half-time (HT) interval warm-up (WU) routines currently used by professional soccer players. This study surveyed 2010/11 season WU strategies and their underpinning scientific reasoning and situational factors via an internet-based questionnaire, which was distr...
journal_title：Journal of sports sciences
pub_type： 杂志文章
doi：10.1080/02640414.2013.792946
更新日期：2013-01-01 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：:The use of dieting, rapid weight loss, and frequent weight fluctuation among athletes competing in weight-class and leanness sports have been considered a problem for years, but the extent of the problem and the health and performance consequences have yet to be fully examined. Most studies examining these issues have...
journal_title：Journal of sports sciences
pub_type： 杂志文章,评审
doi：10.1080/02640414.2011.565783
更新日期：2011-01-01 00:00:00
abstract：:There is a paucity of studies that have evaluated substrate utilisation and protein catabolism during multiday strenuous exercise in athletes. Eleven well-trained male cyclists completed 3 h of race-simulated cycling on 4 consecutive days. Cyclist exercised 2 h postprandially and with carbohydrate supplementation (~50...
journal_title：Journal of sports sciences
pub_type： 杂志文章
doi：10.1080/02640414.2014.949827
更新日期：2015-01-01 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：: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：:We explore how expertise is obtained in the domain of rugby refereeing. The research data are qualitative and are drawn from an 18 month period working in collaboration with the Rugby Football Union Elite Referee Unit. Adopting an ethnographic mode of enquiry, the study combined long-term participant observation with ...
journal_title：Journal of sports sciences
pub_type： 杂志文章
doi：10.1080/17461390500188710
更新日期：2006-03-01 00:00:00
abstract：:Interceptive actions require individuals to time their movements with an external event. To meet the intense spatial-temporal demands needed for successful interception, a tight coupling and coordination between perceptual and motor processes is required. The control strategy that underlies successful performance is a...
journal_title：Journal of sports sciences
pub_type： 杂志文章
doi：10.1080/02640410903156449
更新日期：2009-10-01 00:00:00
abstract：:This study was concerned with the measurement of a selection of performance variables from competitors in the women's long jump final of the World Student Games held in Sheffield, UK in July 1991. Several performances of each of six finalists were recorded on cine-film at 100 Hz. Resulting planar kinematic data were o...
journal_title：Journal of sports sciences
pub_type： 杂志文章
doi：10.1080/02640419308730000
更新日期：1993-08-01 00:00:00
abstract：:We assessed the reliability and validity of a 10-min submaximal treadmill test (T10) to predict critical speed (CS). Forty-two runners completed a familiarization trial plus two experimental trials (T10 test and T10 retest). Reliability between the T10 test and T10 retest was assessed using coefficient of variation (C...
journal_title：Journal of sports sciences
pub_type： 杂志文章
doi：10.1080/02640414.2020.1847504
更新日期：2020-11-15 00:00:00
abstract：:Although it has been generally assumed that the risk of decompression sickness is virtually zero during a single breath-hold dive in humans, repeated dives may result in a cumulative increase in the tissue and blood nitrogen tension. Many species of marine mammals perform extensive foraging bouts with deep and long di...
journal_title：Journal of sports sciences
pub_type： 杂志文章,评审
doi：10.1080/02640410903121351
更新日期：2009-12-01 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
pub_type： 杂志文章
doi：10.1080/026404102320219392
更新日期：2002-09-01 00:00:00
abstract：INTRODUCTION:High-Intensity Interval Training (HIIT) and Constant-Intensity Endurance Training (CIET) improves peak oxygen uptake (V̇O2) similarly in adults; but in children this remains unclear, as does the influence of maturity. METHODS:Thirty-seven boys formed three groups: HIIT (football; n = 14; 14.3 ± 3.1 years)...
journal_title：Journal of sports sciences
pub_type： 杂志文章
doi：10.1080/02640414.2019.1644890
更新日期：2019-11-01 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：:The main purpose of this study was to compare the effects of resistance training (RT) performed with different training volumes on phase angle (PhA), body water components, and muscle quality (MQ) in untrained older adult women. A second purpose was to assess the relationship between PhA and MQ. Sixty-two older adult ...
journal_title：Journal of sports sciences
pub_type： 杂志文章,随机对照试验
doi：10.1080/02640414.2018.1479103
更新日期：2018-12-01 00:00:00
abstract：:The use of high-resolution physical activity intensity spectra obtained from accelerometry can improve knowledge of associations with health and development beyond the use of traditional summary measures of intensity. The aim of the present study was to compare three different approaches for determining associations f...
journal_title：Journal of sports sciences
pub_type： 杂志文章
doi：10.1080/02640414.2020.1824341
更新日期：2020-09-20 00:00:00
abstract：:Muscle strength is thought to be a major factor in athletic success. However, the relationship between muscle strength and sprint performance has received little attention. The aim of this study was to examine the relationship in elite performers of isokinetic muscle strength across three lower limb joints and sprinti...
journal_title：Journal of sports sciences
pub_type： 杂志文章
doi：10.1080/026404198366786
更新日期：1998-04-01 00:00:00
abstract：:Athletes have been shown to have greater movement imagery abilities than non-athletes. However, since these differences were observed using questionnaires where participants subjectively judged the vividness of performing imagined movements, it is possible that responses could be biased by other factors such as social...
journal_title：Journal of sports sciences
pub_type： 杂志文章
doi：10.1080/02640414.2014.889847
更新日期：2014-01-01 00:00:00
abstract：:This study aimed to explore how social media is being used by sports nutritionists as part of service provision, as well as practitioners' experiences and opinions of its use in practice. An exploratory sequential mixed methods approach was used during this research. Forty-four sports nutritionists completed an online...
journal_title：Journal of sports sciences
pub_type： 杂志文章
doi：10.1080/02640414.2019.1642052
更新日期：2019-11-01 00:00:00
abstract：:State anxiety is known to affect far aiming tasks, but less is known about the effects of state anxiety on running and aiming while running. Therefore, in the current study participants ran on a treadmill at their preferred speed in a low- and high-anxiety condition. In both conditions, running was combined with dart ...
journal_title：Journal of sports sciences
pub_type： 杂志文章
doi：10.1080/02640414.2011.617386
更新日期：2012-01-01 00:00:00
abstract：:This study examined the effect of wearing time on comfort perception and landing biomechanics of basketball shoes with different midsole hardness. Fifteen basketball players performed drop landing and layup first step while wearing shoes of different wearing time (new, 2-, 4-, 6- and 8-week) and hardness (soft, medium...
journal_title：Journal of sports sciences
pub_type： 杂志文章
doi：10.1080/02640414.2019.1633158
更新日期：2019-10-01 00:00:00
abstract：:The purpose of this meta-analytic review was to examine the extent and quality of research on the post-activation potentiation acute effect of rest interval manipulation on jumping performance. This manuscript adopted the recommendations from the Preferred Reporting Items for Systematic Reviews and Meta-Analyses State...
journal_title：Journal of sports sciences
pub_type： 杂志文章,meta分析,评审
doi：10.1080/02640414.2012.738924
更新日期：2013-01-01 00:00:00
abstract：:The present study examined exercise affect during volume-load matched, high-velocity, low-load and low-velocity, high-load resistance exercise conditions in older adults. Ten older adults completed three sets of eight exercises on six separate occasions (three high-velocity, low-load and three low-velocity, high-load ...
journal_title：Journal of sports sciences
pub_type： 杂志文章,随机对照试验
doi：10.1080/02640414.2017.1405710
更新日期：2018-07-01 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
pub_type： 临床试验,杂志文章
doi：10.1080/02640414.2011.578146
更新日期：2011-08-01 00:00:00
