International journal of sports physiology and performance Impact Factor & Information

Publisher: Human Kinetics (Organization), Human Kinetics

Journal description

Current impact factor: 2.68

Impact Factor Rankings

2015 Impact Factor Available summer 2015
2013 / 2014 Impact Factor 2.683
2012 Impact Factor 2.247
2011 Impact Factor 1.796

Impact factor over time

Impact factor

Additional details

5-year impact 2.31
Cited half-life 3.80
Immediacy index 0.11
Eigenfactor 0.00
Article influence 0.63
Website International Journal of Sports Physiology and Performance website
Other titles International journal of sports physiology and performance, IJSPP
ISSN 1555-0265
OCLC 58426616
Material type Periodical, Internet resource
Document type Journal / Magazine / Newspaper, Internet Resource

Publisher details

Human Kinetics

  • Pre-print
    • Archiving status unclear
  • Post-print
    • Author can archive a post-print version
  • Conditions
    • Author's post-print only (in PDF or other image capture format)
    • On the author's personal website(s) or institutional repository
    • Publisher's version/PDF cannot be used
    • Publisher copyright and source must be acknowledged
    • Must link to publisher version
    • Set statement to accompany deposit "as accepted for publication"
    • Publisher last contacted on 05/12/2013
  • Classification
    ​ blue

Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: The principle aim of the study was to assess the acute alterations in tri-axial accelerometry (PlayerLoad™; PLVM) and its individual axial-planes (anterior-posterior-PlayerLoad™ [PLAP], medial-lateral-PlayerLoad™ [PLML] and vertical-PlayerLoadTM [PLV]) during a standardised 90-min soccer match-play simulation (SAFT90). Secondary aims of the study were to assess the test-retest reliability and anatomical location of the devices. Semi-professional (n=5) and University (n=15) soccer players completed 3 trials (1 familiarisation, 2 experimental) of SAFT90. PlayerLoad™ and its individual planes were measured continuously using micromechanical-electrical systems (MEMS) positioned at the scapulae (SCAP) and near the centre of mass (COM). There were no between-half differences in PLVM, however, within-half increases were recorded at the COM, but only during the 1st half at the SCAP. Greater contributions to PLVM were provided by PLV and PLML when derived from the SCAP and COM, respectively. PLVM (COM: 1451 ± 168; SCAP: 1029 ± 113), PLAP (COM: 503 ± 99; SCAP: 345 ± 61), PLML (COM: 712 ± 124; SCAP: 348 ± 61) and PLV (COM: 797 ± 184; SCAP: 688 ± 124) were significantly greater at the COM compared to the SCAP. Moderate and high test-retest reliability was observed for PlayerLoad™ and its individual planars at both locations (ICC: 0.80-0.99). PlayerLoad™ and its individual planes are reliable measures during SAFT90 and detected within-match changes in movement strategy when the unit was placed at the COM, which may have implications for fatigue management. Inferring alterations in lower-limb movement strategies from MEMS units positioned at the SCAP should be undertaken with caution.
    International journal of sports physiology and performance 06/2015; DOI:10.1123/ijspp.2014-0582
  • [Show abstract] [Hide abstract]
    ABSTRACT: This study examined the relationships between tackling ability, playing position, muscular strength and power qualities, and match-play tackling performance in semi-professional rugby league players. Sixteen semi-professional rugby league players (mean ± SD age, 23.8 ± 1.9 yr) underwent tests for muscular strength and power. Tackling ability of the players was tested using video analysis of a standardized one-on-one tackling drill. After controlling for playing position, players were divided into "good tacklers" or "poor tacklers" groups based on the median split of the results of the one-on-one tackling drill. A total of 4547 tackles were analyzed from video recordings of 23 matches played throughout the season. Maximal squat was significantly associated with tackling ability (rs = 0.71; p<0.05) and with the proportion of dominant tackles (rs = 0.63; p<0.01). Forwards performed more tackles (p=0.013; ES=1.49), with a lower proportion of missed tackles (p=0.03; ES=1.38) than backs. "Good tacklers" were involved in a larger proportion of dominant tackles and smaller proportion of missed tackles than "poor tacklers". These findings demonstrate that lower body strength contributes to a more effective tackling performance during both a standardized tackling assessment and match-play. Furthermore, players with good tackling ability in a proficiency test were involved in a higher proportion of dominant tackles, and missed a smaller proportion of tackles during match-play. These results provide further evidence of the practical utility of an off-field tackling assessment in supplying information predictive of tackling performance in competition.
    International journal of sports physiology and performance 06/2015; DOI:10.1123/ijspp.2015-0044
  • [Show abstract] [Hide abstract]
    ABSTRACT: Pacing has a substantial effect on endurance performance. Here we characterize pacing and identify its parameters for optimal performance in 1500-m freestyle swimming. Websites provided 50-m lap and 1500-m race times for 330 swims of 24 elite male swimmers. Pacing for each swim was characterized with seven parameters derived from a general linear model: linear and quadratic coefficients for the effect of lap number, reductions from predicted time for first, second, penultimate and last laps, and lap-time variability. Scatterplots of race time versus each parameter for each swimmer were used to identify optimum values of parameters. Most scatterplots showed only weak relationships between the parameter and performance, but between one-third to one-half of swimmers had an optimum value of the parameter that was substantially different from their mean value. A large improvement in performance time (1.4% ± 0.9%, mean ± SD) could be achieved generally by reversing the sign of the linear parameter to make the slowest lap occur earlier in the race. Small to moderate improvements might also accrue by changing the quadratic parameter, by making the first and second laps slower, the penultimate and last laps faster, and reducing lap-time variability. This approach to analysis of pacing may help to improve performance in swimmers and other endurance athletes in sports with multiple laps, but data from many competitions are required.
    International journal of sports physiology and performance 06/2015; DOI:10.1123/ijspp.2015-0117
  • [Show abstract] [Hide abstract]
    ABSTRACT: The oral presence of carbohydrate (CHO) and caffeine (CAF) may independently enhance exercise performance, but their influence on performance during prolonged exercise is less known. To determine the independent and combined effects of CHO and CAF administered in chewing gum during a cycling time-trial (TT) following prolonged exercise. Eleven male cyclists (32.2 ± 7.5 y, 74.3 ± 6.8 kg, 60.2 ± 4.0 ml·kg-1·min-1 O2peak) performed 4 experimental trials consisting of 90-min constant-load cycling at 80% of their second ventilatory threshold (207 ± 30 W), followed immediately by a 20-km TT. Under double-blinded conditions, cyclists received placebo (PLA), CHO, CAF, or a combined (CHO+CAF) chewing gum at 0, 5, 10, and 15-km points of the TT. Overall TT performance was similar across experimental and PLA trials (%Mean Difference ±90%CL: 0.2 ±2.0%, 0.4 ±2.2%, 0.1 ±1.8% for CHO, CAF and CHO+CAF). Compared with PLA, mean power output tended to be higher in the first two quarters of the TT with CHO (1.6 ±3.1 and 0.8 ±2.0%) and was substantially improved in the last two quarters during CAF and CHO+CAF trials (4.2 ±3.0 and 2.0 ±1.8%). There were no differences in average heart rate (ES <0.2) and only small changes in blood glucose (ES 0.2), which were unrelated to performance. Blood lactate was substantially higher post TT for CAF and CHO+CAF (ES >0.6). Following prolonged constant-load cycling, the oral presence of CHO and CAF in chewing gum, independently or in combination, did not improve overall performance, but did influence pacing.
    International journal of sports physiology and performance 06/2015; DOI:10.1123/ijspp.2015-0133
  • [Show abstract] [Hide abstract]
    ABSTRACT: Exercise exerts various effects on the immune system and evidence is emerging on its anti-inflammatory effects; the mechanisms on the basis of these modifications are poorly understood. Mitochondrial DNA (mtDNA) released from damaged cells acts as a molecule containing the so-called "damage-associated molecular patterns" (DAMP) and can trigger sterile inflammation. Indeed, high plasma levels of mtDNA are associated to several inflammatory conditions and physiological aging and longevity. We have evaluated plasma mtDNA in professional male volleyball players during the seasonal training, and the possible correlation between mtDNA levels and clinical parameters, body composition and physical performances. Plasma mtDNA was quantified by Real Time PCR, every 2 months, in 12 professional volleyball players (PVP) during two consecutive seasons. As comparison, 20 healthy non-athlete male volunteers (NA) were analysed. We found lower levels of mtDNA in plasma of PVP compared to NA. However, PVP showed a decrease of circulating mtDNA only in the first season, while no appreciable variations were observed during the second season. No correlation was observed among mtDNA, haematochemical and anthropometric parameters. Regular physical activity appeared associated with lower levels of circulating mtDNA, further confirming the protective, anti-inflammatory effect of exercise.
    International journal of sports physiology and performance 06/2015; DOI:10.1123/ijspp.2014-0461
  • [Show abstract] [Hide abstract]
    ABSTRACT: This study aimed to investigate biomechanical parameters during a change of direction task in collegiate soccer players. Fourteen male and twelve female players performed a 10-m sprint with a 60° change of direction at 5 m. Vertical and mediolateral ground reaction force (GRF) and contact time were measured by having the subjects run in both directions while contacting a force plate with either their preferred (kicking) or non-preferred leg. Using the midpoint between two pelvic markers, further parameters were evaluated: performance cutting angle and horizontal distance. Relationships between parameters, sex and leg preference were analysed. Significant correlations emerged between vertical and mediolateral GRF (r = 0.660 to 0.909) and between contact time and performance cutting angle (r = -0.598 to -0.793). Sex differences were found for mediolateral GRF (p = 0.005), performance cutting angle (p = 0.043), and horizontal distance (p = 0.020). Leg differences were observed for vertical GRF (p = 0.029), performance cutting angle (p = 0.011), and horizontal distance (p = 0.012). This study showed as a sharper change of direction corresponded to a longer contact time, while no relationships were found with GRF. Moreover the measuring of the angle revealed that the real path traveled was different from the theoretical one highlighting the performance of sharper or more rounded execution. In conclusion, this study showed that specific biomechanical measurements can provide details about the execution of a change of direction highlighting the ability of the non-preferred leg to perform better directional changes.
    International journal of sports physiology and performance 05/2015; DOI:10.1123/ijspp.2014-0458
  • [Show abstract] [Hide abstract]
    ABSTRACT: Plyometrics are a popular training modality for basketball players to improve power and change-of-direction speed. Most plyometric training has utilized sagittal-plane exercises, but improvements in change-of-direction speed have been greater in multi-direction programs. The purpose of this study was to determine the benefits of a 6-week frontal-plane plyometric (FPP) training program compared to a 6-week sagittal-plane plyometric (SPP) training program with regard to power and change-of-direction speed. Fourteen female varsity high school basketball players participated in the study. Multiple 2 x 2 repeated measures ANOVAs were used to determine differences for the FPP and SPP groups from pre-intervention to post-intervention on four tests of power and two tests of change-of-direction speed. There was a group main effect for time in all six tests. There was a significant group x time interaction effect in three of the six tests. The SPP improved performance of the countermovement vertical jump more than the FPP, whereas the FPP improved performance of the lateral hop (left) and lateral shuffle test (left) more than the SPP. The standing long jump, lateral hop (right), and lateral shuffle test (right) did not show a significant interaction effect. These results suggest that basketball players should incorporate plyometric training in all planes to improve power and change-of-direction speed.
    International journal of sports physiology and performance 05/2015; DOI:10.1123/ijspp.2015-0058
  • [Show abstract] [Hide abstract]
    ABSTRACT: The aims of this study were to examine the impact of varying between-match microcycles on training characteristics (i.e. intensity, duration and load) in professional Rugby League players and to report on match load related to these between-match microcycles. Training load data was collected during a 26-week competition period of an entire season. Training load was measured using the session rating of perceived exertion (session-RPE) method for every training session and match from 44 professional Rugby League players from the same National Rugby League team. Using the category-ratio 10 RPE scale, the training intensity was divided into three zones (low <4 AU; moderate ≥4 to ≤7 AU and high >7 AU). Three different length between-match recovery microcycles were used for analysis: a) 5-6 days, b) 7-8 days, c) and 9-10 days. A total of 3,848 individual sessions were recorded. During the shorter length between-match microcycles (5-6 days), significantly lower training load was observed. No significant differences for subsequent match load or intensity were identified between the various match recovery periods. Overall, 16% of the training sessions were completed at the low-intensity zone, 61% at the moderate-intensity zone, and 23% at the high-intensity zone. The present findings demonstrate that Rugby League players undertake higher training load as the length between-match microcycles is increased. The majority of in-season training of professional Rugby League players was at moderate-intensity, and a polarized approach to training that has been reported in elite endurance athletes does not occur in professional Rugby League.
    International journal of sports physiology and performance 05/2015; DOI:10.1123/ijspp.2015-0100
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