Abstract:
:Bioelectrical impedance spectroscopy (BIS) is an inexpensive and non-invasive technique to measure total body water (TBW), extracellular water (ECW), and intracellular water (ICW). The purpose of this study was to validate TBW, ECW and ICW assessed by BIS, using dilution techniques as the reference method (REF) in elite judo athletes. Thirty-two Portuguese elite male judo athletes were evaluated during a period of weight stability. TBW, ECW and ICW were assessed by BIS (Xitron 4000). Deuterium and bromide dilution techniques were used as the criterion method for measuring TBW and ECW, while ICW was calculated as the difference between the two. BIS explained 96%, 77% and 94% of the total variability from REFs for TBW, ECW and ICW, respectively. BIS also demonstrated high precision (ρ ≥ 0.88) and accuracy (Cb = 0.98), with a minimum concordance coefficient correlation of 0.87 for ECW. The mean bias demonstrated that BIS slightly overestimated the REF in 1.1 kg (2.3%), 0.3 kg (1.6%) and 0.8 kg (2.7%) for TBW, ECW and ICW, respectively. The 95% limits of agreement ranged from -1.2 to 3.3 kg in TBW, from -1.8 to 2.4 kg in ECW and from -1.0 to 2.6 kg in ICW. A non-significant trend was found between the difference and the mean of reference and alternative methods. These findings highlight the efficacy of BIS as a valid non-biased tool for the assessment of TBW and its compartments in elite male judo athletes, during a period of weight stability.
journal_name
J Sports Scijournal_title
Journal of sports sciencesauthors
Gonçalves EM,Matias CN,Santos DA,Sardinha LB,Silva AMdoi
10.1080/02640414.2014.953981subject
Has Abstractpub_date
2015-01-01 00:00:00pages
634-40issue
6eissn
0264-0414issn
1466-447Xjournal_volume
33pub_type
杂志文章abstract::The current study sought to examine the construct validity of the Resistance Training Skills Battery for Children (RTSBc), a movement screen purported to assess resistance training skill in children. Children aged 7-10 years (n = 27, 21 males, 6 females) undertook measures of resistance training skill via the RTSBc, m...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2018.1428885
更新日期:2018-09-01 00:00:00
abstract::Investigations in the 1990s evaluated the influence of breathing assemblies on respiratory variables at rest and during exercise; however, research on new models of breathing assemblies is lacking. This study compared metabolic gas analysis data from a mouthpiece with a noseclip (MOUTH) and a face mask (MASK). Volunte...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2015.1075058
更新日期:2016-01-01 00:00:00
abstract::Many sports events require participants to exert a maximal effort in the closing stages-that is, after prior fatiguing exercise. Peak and mean pedalling rate during 30 s of high-intensity cycle ergometer exercise was manipulated by altering the applied resistance or the initial exercise intensity so that the effect of...
journal_title:Journal of sports sciences
pub_type: 临床试验,杂志文章
doi:10.1080/026404197367470
更新日期:1997-04-01 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::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::A simulated cricket batting innings was developed to replicate the physical demands of scoring a century during One-Day International cricket. The simulated innings requires running-between-the-wickets across six 5-over stages, each of 21 min duration. To validate whether the simulated batting innings is reflective of...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2011.560174
更新日期:2011-05-01 00:00:00
abstract::A maximal multistage 20 m shuttle run test was designed to determine the maximal aerobic power of schoolchildren, healthy adults attending fitness class and athletes performing in sports with frequent stops and starts (e.g. basketball, fencing and so on). Subjects run back and forth on a 20 m course and must touch the...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640418808729800
更新日期:1988-07-01 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::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::Adequate dietary strategies are essential for the successful participation in ultra-endurance races. The aim of this study was to evaluate and compare the energy and water intakes of participants during three different mountain ultra-endurance runs. The study took place at the "Ultra Mallorca Serra de Tramuntana" (Mal...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2017.1306092
更新日期:2018-02-01 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 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...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2016.1266017
更新日期:2017-12-01 00:00:00
abstract::Agility is an essential part of many athletic activities. Currently, agility drill duration is the sole criterion used for evaluation of agility performance. The relationship between drill duration and factors such as acceleration, deceleration and change of direction, however, has not been fully explored. This paper ...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2014.990481
更新日期:2015-01-01 00:00:00
abstract::Assessments of maximal intensity exercise which determine peak power output on friction-baked cycle ergometers have fallen into two categories: correction procedures which account for changes in momentum of the ergometer's flywheel and optimization procedures which attempt to satisfy muscle force-velocity relationship...
journal_title:Journal of sports sciences
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1080/02640419608727738
更新日期:1996-12-01 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::High Intensity Interval Training (HIIT) may be effective for accumulating VPA. However, the contribution of HIIT to overall physical activity is unknown. Our primary aim was to explore the impact of school-based HIIT on physical activity. The secondary aim was to explore within-individual changes in physical activity ...
journal_title:Journal of sports sciences
pub_type: 杂志文章,随机对照试验
doi:10.1080/02640414.2017.1356026
更新日期:2018-05-01 00:00:00
abstract::The aim of this study was to assess the effects of nicotinamide adenine dinucleotide hydride (NADH) on maximal oxygen uptake (VO2max), maximal anaerobic running time, and mental performance. Eight men were exposed to a supplement treatment (30 mg NADH as ENACHI tablets per day) and to a placebo treatment, each of 4 we...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640410701474200
更新日期:2008-02-01 00:00:00
abstract::The purpose of this study was to determine the foot strike patterns (FSP), rearfoot position at initial contact (RPic, i.e., No INV/EVE) and foot rotation in children in relation to age. A total of 932 children aged 3 to 16 years participated in this study. A sagittal and frontal-plane video was recorded using a high-...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2018.1507237
更新日期:2019-03-01 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::This study aimed to evaluate the test-retest reliability of a new device for assessing ankle joint kinesthesia. This device could measure the passive motion threshold of four ankle joint movements, namely plantarflexion, dorsiflexion, inversion and eversion. A total of 21 healthy adults, including 13 males and 8 femal...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2014.1003589
更新日期:2015-01-01 00:00:00
abstract::In taekwondo, the stance position can potentially affect kick performance. The aim of this study was to analyse mechanical variables in the roundhouse kick in taekwondo according to three stance positions (0°, 45°, 90°). Nine experienced taekwondo athletes performed consecutive kicking trials in a random order accordi...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2013.803590
更新日期:2013-01-01 00:00:00
abstract::The aim of this study is to examine the prevalence and correlates of adolescents' resistance training (RT) skill competence. Participants were 548 adolescents (14.1 ± 0.5 years) from 16 schools in New South Wales, Australia. RT skills were assessed using the Resistance Training Skills Battery. Demographics, BMI, muscu...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2017.1370822
更新日期:2018-06-01 00:00:00
abstract::Protease supplementation has been shown to attenuate soft tissue injury resulting from intense exercise. The aim of this study was to evaluate the effects of protease supplementation on muscle soreness and contractile performance after downhill running. Ten matched pairs of male participants ran at a -10% grade for 30...
journal_title:Journal of sports sciences
pub_type: 临床试验,杂志文章
doi:10.1080/02640410310001641584
更新日期:2004-04-01 00:00:00
abstract::The aim of this study was to examine the effect of movement and stretching imagery on increases in flexibility. Thirty volunteers took part in a 4 week flexibility training programme. They were randomly assigned to one of three groups: (1) movement imagery, where participants imagined moving the limb they were stretch...
journal_title:Journal of sports sciences
pub_type: 杂志文章,随机对照试验
doi:10.1080/02640410500131811
更新日期:2006-02-01 00:00:00
abstract::Competitive soccer engages many of the body's systems to a major extent. The musculoskeletal, nervous, immune and metabolic systems are stressed to a point where recovery strategies post-exercise become influential in preparing for the next match. Intense activity at a 7-day training camp causes participants to experi...
journal_title:Journal of sports sciences
pub_type: 杂志文章,评审
doi:10.1080/02640410400021302
更新日期:2005-06-01 00:00:00
abstract::Carbohydrate (CHO) ingestion enhances "feel-good" responses during acute exercise but no study has examined the effect of regular ingestion of CHO on affective valence. We investigated the effect of CHO ingestion on perceptual responses and perceived work intensity of individual exercise sessions throughout a 10-week ...
journal_title:Journal of sports sciences
pub_type: 杂志文章,随机对照试验
doi:10.1080/02640414.2017.1306651
更新日期:2018-02-01 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
pub_type: 杂志文章
doi:10.1080/02640414.2016.1149602
更新日期:2016-10-01 00:00:00
abstract::Composite materials have given manufacturers the freedom to develop a broad range of tennis rackets, allowing them to change key parameters such as the structural stiffness, mass, and position of the balance point. The aim of this research was to determine how changing these parameters could affect ball resultant rebo...
journal_title:Journal of sports sciences
pub_type: 杂志文章
doi:10.1080/02640414.2010.526131
更新日期:2011-02-01 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::Haem-oxygenase-1 (HO-1) is an antioxidant stress protein that is mainly induced by reactive oxygen species, inflammatory cytokines and hyperthermia. We assessed the influence of different types of exercise on HO-1 expression in leukocytes of the peripheral blood in three groups of male participants: a short exhaustive...
journal_title:Journal of sports sciences
pub_type: 临床试验,杂志文章
doi:10.1080/0264041031000071164
更新日期:2003-05-01 00:00:00