Mixed-methods pre-match cooling improves simulated soccer performance in the heat     

Jeffrey William Frederick Aldous  Bryna Catherine Rose Chrismas  Ibrahim Akubat  Charlotte Anne Stringer  Grant Abt 《European Journal of Sport Science》2019,19(2):156-165

This investigation examined the effects of three pre-match and half-time cooling manoeuvres on physical performance and associated physiological and perceptual responses in eight University soccer players during a non-motorised treadmill based individualised soccer-specific simulation [intermittent soccer performance test (iSPT)] at 30°C. Four randomised experimental trials were completed; following 30-min (pre-match) and 15-min (half-time) cooling manoeuvres via (1) ice slurry ingestion (SLURRY); (2) ice-packs placed on the quadriceps and hamstrings (PACKS); (3) mixed-methods (MM; PACKS and SLURRY concurrently); or no-cooling (CON). In iSPT first half, a moderate increase in total (Mean?±?Standard Deviation: 108?±?57 m, qualitative inference: most likely, Cohen’s d: 0.87, 90%CL: ±0.31), high-speed (56?±?46 m, very likely, 0.68?±?0.38) and variable run (15?±?5 m, very likely, 0.81?±?0.47) distance covered was reported in MM compared with CON. Additionally, pre-match reductions in thermal sensation (–1.0?±?0.5, most likely, –0.91?±?0.36), rectal (–0.6?±?0.1°C, very likely, –0.86?±?0.35) and skin temperature (–1.1?±?0.3°C, very likely, –0.88?±?0.42) continued throughout iSPT first half. Physical performance during iSPT first half was unaltered in SLURRY and PACKS compared to CON. Rectal temperature was moderately increased in SLURRY at 45-min (0.2?±?0.1°C, very likely, 0.67?±?0.36). Condition did not influence any measure in iSPT second half compared to CON. Only MM pre-match cooling augmented physical performance during iSPT first half, likely due to peripheral and central thermoregulatory factors favourably influencing first half iSPT performance. Further practical half-time cooling manoeuvres which enhance second half performance are still required.  相似文献   

The association of bike fitting with injury,comfort, and pain during cycling: An international retrospective survey     

Jose Ignacio Priego Quesada  Zachary Y. Kerr  William Michael Bertucci  Felipe P. Carpes 《European Journal of Sport Science》2019,19(6):842-849

Although bike fitting is recommended to help reduce injury risk, little empirical evidence exists to indicate an association between bike fitting and injury incidence. The aim of the study was to determine the effect of bike fitting on self-reported injury, comfort, and pain while cycling from a worldwide survey of cyclists. A total of 849 cyclists completed an online questionnaire between February and October 2016. Questionnaire collected data on respondent demographics, cycling profile, bike fitting, comfort and pain while cycling, and injury history. The main predictor variable was bike fitting (yes, by the respondent, i.e. user bike fitting; yes, by a professional service; or no). Covariates included demographic and cycling profile characteristics. Logistic regression models estimated the odds of injury within the last 12 months, reporting a comfortable body posture while cycling, and not reporting pain while cycling. Odds ratios (OR) with 95% confidence intervals (CI) were reported. User bike fitting was associated with increased odds of reporting a comfortable posture (OR?=?2.28, 95%CI: 1.06, 4.68). User (OR?=?2.35; 95%CI: 1.48, 3.84) and professional bike fitting (OR?=?2.35; 95%CI: 1.42, 3.98) were both associated with increased odds of not reporting pain while cycling. No associations were found between bike fitting and injury within the last 12 months. In conclusion, we found an association between bike fitting and reported comfort and pain while cycling. We recommend integrating bike fitting into cycling maintenance. However, further studies with longer follow-up are necessary to determine the presence of an association between bike fitting and injury.  相似文献   

Multiple titles     

William E. Roweton  Noranne Yeager 《Psychology in the schools》1998,35(2):192-194

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Editor's note: Enduring scholarship and dialogue     

William C. Kyle  Jonathan Osborne  John Leach  Phil Scott  Stephen P. Norris 《科学教学研究杂志》1998,35(1):1-2

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Visuals: 4. Information processing     

William Deterline 《Performance Improvement》1989,28(9):38-43

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Visuals: 3. Avoiding visual trips     

William Deterline 《Performance Improvement》1989,28(8):42-46

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Church and Estate: Religion and Wealth in Industrial Era Philadelphia Thomas F. Rzeznik. University Park: Pennsylvania State University Press, 2013.     

William Carney 《Journal of American culture (Malden, Mass. : 2003)》2014,37(4):432-433

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Speaking out: The instructional technology crap game!     

William A. Deterline 《Performance Improvement》1987,26(2):24-25

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Performance of black and white children on the bracken basic concept scale     

Bruce A. Bracken  Darrell Sabers  William Insko 《Psychology in the schools》1987,24(1):22-27

One hundred fourteen matched pairs of black and white children were compared in their performance on the Bracken Basic Concept Scale. It was found that the white children attained scores that were nearly identical with the national average, but the black children performed approximately one-half standard deviation below their white counterparts. The black and white children exhibited similar patterns of performance on the BBCS subtests, suggesting a similar cognitive approach to the tasks.  相似文献   

User friendly,part three: Insufferable swine     

William A. Deterline 《Performance Improvement》1988,27(7):30-33

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