International journal of sports physiology and performance (Int J Sports Physiol Perform )

Publisher: Human Kinetics (Organization), Human Kinetics

Description

  • Impact factor
    2.25
  • 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: Describe the internal training load (ITL) of common training sessions performed during a typical week and to determine the relationships between different indicators of ITL commonly employed in professional football. Session-RPE TL (sRPE-TL) and HR-derived measurements of ITL as Edward's-TL and Stagno training impulses (TRIMPMOD) were used in nine players during three periods of the season. The relationships between them were analyzed in different training sessions during a typical week: Skill Drills/Circuit Training+Small-Sided Games (SCT+SSGs), Ball-Possession Games+Technical-Tactical Exercises (BPG+TTE), Tactical-Training (TT) and Pre-Match activation (PMa). HR values obtained during SCT+SSGs and BPG+TTE were substantially greater than the other two sessions, all the ITL markers and session duration were substantially greater in SCT+SSGs than in any other session, and all ITL measures in BPG+TTE were substantially greater than in TT and PMa sessions. Large relationships were found between HR>80% HRmax- and HR>90% HRmax - sRPR-TL during BPG+TTE and TT sessions (r = 0.61 to 0.68). Very large relationships were founded between Edward's TL - sRPE-TL and between TRIMPMOD - sRPE-TL in sessions with BPG+TTE and TT (r = 0.73 to 0.87). Correlations between the different HR-based methods were always extremely large (r = 0.92 to 0.98), and unclear correlations were observed for other relationships between variables. Session-RPE provided variable magnitude within-individual correlations with HR-derived measures of training intensity and load during different types of training sessions typically performed during a week in professional soccer. Caution should be applied when using RPE- or HR-derived measures of exercise intensity/load in soccer training interchangeably.
    International journal of sports physiology and performance 12/2014;
  • [Show abstract] [Hide abstract]
    ABSTRACT: PURPOSE: This study aimed to determine whether biomechanical characteristics such as ground contact time, swing time, stride length and frequency contribute to the exceptional running economy of East African runners. METHODS: Seventeen elite long-distance runners (9 Eritrean, 8 European) performed an incremental maximal running test and three submaximal running bouts at 17, 19 and 21 km·h-1. During the tests, gas-exchange parameters were measured to determine the maximal oxygen uptake (VO2max) and running economy (RE). Additionally, ground contact time, swing time, stride length and stride frequency were measured. RESULTS: The European runners had higher VO2max values than the Eritrean runners (77.2 ± 5.2 vs. 73.5 ± 6.0 ml·kg-1·min-1, p=0.011, effect sizes (ES)=0.65), although Eritrean runners were more economical at 19 km·h-1 (191.4 ± 10.4 ml·kg-1·km-1 vs. 205.9 ± 13.3 ml·kg-1·km-1, p=0.026, ES=1.21). There were no differences between groups for ground contact time, swing time, stride length or stride frequency at any speed. Swing time was associated with running economy at 21 km·h-1 in the Eritrean runners (r=0.71, p=0.033) but no other significant association was found between RE and biomechanical variables. Lastly, best 10-km performance was significantly correlated with RE (r=-0.57; p=0.013). CONCLUSIONS: Eritrean runners have superior RE compared to elite European runners. This appears to offset their inferior VO2max. However, the present data suggest their better RE does not have a biomechanical basis. Other factors, not measured in the present study, may contribute to this RE advantage.
    International journal of sports physiology and performance 10/2014;
  • [Show abstract] [Hide abstract]
    ABSTRACT: Purpose: The purpose of this study was to examine the concurrent and construct validity of the Borg (0-10) and children’s OMNI scales for quantifying the exercise intensity and training load (TL) in youth soccer players. Methods: Twelve children (mean ± SD; age, 11.4 ± 0.5 yr; height, 154.3 ± 6.5 cm and body mass, 39.5 ± 5.4 kg) took part in this study. Exercise intensity and TL were calculated on the basis of the session rating of perceived exertion (sRPE) and HR (Edwards’ method) during 20 technical-tactical training sessions. Players’ sRPE were obtained from the Borg and OMNI scales. Results: Low correlations between HR-based TL and sRPE TL based on the Borg (r = 0.17, P = 0.335) and OMNI (r = 0.34, P = 0.007) scales were obtained. Significant (P < 0.001) relationships in sRPE (r = 0.76) and TL (r = 0.79) between RPE scales were found. Conclusion: The present data do not support the relationship between the sRPE and HR methods for quantifying TL in youth soccer players. However, the sRPE method could be considered a better indicator of global internal TL, since sRPE is a measure of both physical and psychological stress. In addition, we have demonstrated the construct validity for OMNI scale to control exercise demands.
    International journal of sports physiology and performance 09/2014;
  • [Show abstract] [Hide abstract]
    ABSTRACT: To quantify the activity profiles of elite wheelchair rugby players and establish classification-specific arbitrary speed zones. Additionally, indicators of fatigue during full matches were explored.
    International journal of sports physiology and performance 09/2014;
  • [Show abstract] [Hide abstract]
    ABSTRACT: To describe the physical and technical demands of rugby league 9s (RL9s) match-play for positional groups.
    International journal of sports physiology and performance 09/2014;
  • [Show abstract] [Hide abstract]
    ABSTRACT: The aim of this study was to investigate the effectiveness of a caffeinated energy drink to enhance physical performance in elite junior tennis players. In two different sessions separated by one week, 14 young (16±1 years) elite level tennis players ingested 3 mg of caffeine per kg of body mass in the form of an energy drink or the same drink without caffeine (placebo drink). After sixty minutes, participants performed a handgrip strength test, a maximal velocity serving test, an 8×15 m sprint test and then played a simulated singles match (best of 3 sets). Instantaneous running speed during the matches was assessed using global positioning devices (GPS) devices. Furthermore, the matches were video-taped and notated afterwards. In comparison to the placebo drink, the ingestion of the caffeinated energy drink increased handgrip force by ~4.2±7.2% (P=0.03) in both hands and the running pace at high intensity (46.7±28.5 vs 63.3±27.7 m·h-1; P=0.02) and the number of sprints (12.1±1.7 vs 13.2±1.7; P=0.05) during the simulated match. There was a tendency for increased maximal running velocity during the sprint test (22.3±2.0 vs 22.9±2.1 km·h-1; P=0.07) and higher percentage of points won on service with the caffeinated energy drink (49.7±9.8 vs 56.4±10.0%; P=0.07) in comparison to the placebo drink. The energy drink did not improve ball velocity during the serving test (42.6±4.8 vs 42.7±5.0 m·s-1; P=0.49). The pre-exercise ingestion of caffeinated energy drinks was effective to enhance some aspects of the physical performance of elite junior tennis players.
    International journal of sports physiology and performance 08/2014;
  • [Show abstract] [Hide abstract]
    ABSTRACT: The aim of this study was to analyze the effects of a very congested match schedule on the total distance covered (TD), high-intensity running distance (HIR), and frequency of accelerations and body load impacts (BLI) performed in a team of Under-15 soccer players (n=10; 15.1±0.2 yr, 171.8±4.7 cm, 61±6.0 kg) during an international youth competition.
    International journal of sports physiology and performance 08/2014;
  • [Show abstract] [Hide abstract]
    ABSTRACT: This study aimed to investigate the ethnicity of Kenya's most successful international runners, tracking their evolution over the period of their international emergence and current dominance.
    International journal of sports physiology and performance 08/2014;
  • [Show abstract] [Hide abstract]
    ABSTRACT: Static stretching with rest between repetitions is often performed to acutely increase joint flexibility. PURPOSE: To test 1) the effects of the lack of resting between stretching repetitions, and 2) the minimal number of stretching repetitions required to change the maximal range of motion (ROM), maximal tolerated joint passive torque (MPT), and submaximal passive torque at a given angle (PT). METHODS: Five static stretching repetitions with a 30-s rest interval (RI) and non-rest interval (NRI) stretching protocols were compared. Participants (n=47) were encouraged to perform the maximal ROM without pain in all the repetitions. Each repetition lasted 90 s. Maximal ROM, MPT, PT, and muscle activity were compared between protocols for the same number of stretching repetitions. RESULTS: The NRI produced a higher increase in maximal ROM and MPT during and after stretching (P<0.05). PT decreased in both protocols, although the NRI tended to have a lower decrement across different submaximal angles (0.05<P<0.08) in the initial range of the torque-angle curve. Significantly changes in maximal ROM (P<0.01) and PT (P<0.01) were obtained at the 3rd and 2nd repetition of RI, respectively. The RI did not significantly increase the MPT (P=0.12) after stretching, only the NRI did (P<0.01). CONCLUSIONS: Lack of rest between repetitions more efficiently increased the maximal ROM and capacity to tolerate passive torque during and after stretching. The use of 30-s rest between repetitions potentiates the decrease in passive torque. Rest intervals should not be used if the aim is to acutely increase the maximal ROM and peak passive torque.
    International journal of sports physiology and performance 07/2014;