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Zhen Zeng, Christoph Centner, Albert Gollhofer and Daniel König

extent of BFR as well as assessing the AOP in BFR research. 17 – 21 However, there is a lack of evidence regarding the accuracy of PO in determining both lower- and upper-limb AOP for BFR protocols. Therefore, the main purpose of this study was to evaluate the validity between PO for measuring the AOP

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Natalia Romero-Franco, Juan Antonio Montaño-Munuera, Juan Carlos Fernández-Domínguez and Pedro Jiménez-Reyes

in sport to strengthen the quadriceps muscles 18 and its importance in sports movements (ie, running or kicking a ball), it is necessary to have affordable and portable tools to evaluate knee proprioception in OKC. Thus, we aimed to analyze the validity, intertester, and intratester reliability of

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Eva Piatrikova, Ana C. Sousa, Javier T. Gonzalez and Sean Williams

applied in multiple sports such as cycling, 6 running, 7 rowing, 8 and team sports, 9 only 2 attempts have been made to validate the 3MT in free swimming. 10 , 11 Tsai and Thomas 10 assessed the validity of the 3MT in recreational swimmers and found that D 3 MT ′ was lower compared with D CM

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Nora E. Miller, Scott J. Strath, Ann M. Swartz and Susan E. Cashin

This study examined the predictive validity of accelerometers (ACC) to estimate physical activity intensity (PAI) across age and differences in intensity predictions when expressed in relative and absolute PAI terms. Ninety adults categorized into 3 age groups (20–29, 40–49, and 60–69 yr) completed a treadmill calibration study with simultaneous ACC (7164 Actigraph) and oxygen-consumption assessment. Results revealed strong linear relations between ACC output and measured PAI (R 2 = .62–.89) across age and similar ACC cut-point ranges across age delineating absolute PAI ranges compared with previous findings. Comparing measured metabolic equivalents (METs) with estimated METs derived from previously published regression equations revealed that age did not affect predictive validity of ACC estimates of absolute PAI. Comparing ACC output expressed in relative vs. absolute terms across age revealed substantial differences in PAI ACC count ranges. Further work is warranted to increase the applicability of ACC use relative to PAI differences associated with physiological changes with age.

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Panteleimon Ekkekakis, Eric E. Hall and Steven J. Petruzzello

Two studies were conducted to examine the internal consistency and validity of the state anxiety subscale of the State-Trait Anxiety Inventory (SAI) in the context of acute exercise. SAI responses typically found in the exercise literature were replicated. Analysis at the item level revealed divergent response patterns, confounding the total SAI score. During moderate and immediately after vigorous exercise, scores on items referring to cognitive antecedents of anxiety decreased, whereas scores on items assessing perceived activation increased. Indices of internal showed exercise-associated decreases. A principal-components analysis of responses immediately postexercise revealed a multidimensional structure, distinguishing “cognitive” and “activation” items. By failing to discern exercise-induced and anxiety-related increases in activation from anxiety-antecedent appraisals, the SAI exhibits compromised internal consistency and validity in the context of acute exercise.

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Seihati A. Shiroma, Ursula F. Julio and Emerson Franchini

frequently used to evaluate judo athletes have been conducted in laboratory settings (eg, treadmill, lower- or upper-body cycle ergometers). 2 , 5 , 11 Therefore, these tests present low ecological validity to prescribe and assess judo training-induced specific adaptations. 10 , 12 To counter this

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Yucui Diao, Cuixiang Dong, Lisa M. Barnett, Isaac Estevan, Jing Li and Liu Ji

for a valid and reliable measure of perceived motor competence in accordance with the movement skills that children often execute in a variety of movement and physical activity environments. Thus, a pictorial instrument based on the skills in the Test of Gross Motor Development 2nd edition (TGMD-2

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Ryan M. Hulteen, Lisa M. Barnett, Philip J. Morgan, Leah E. Robinson, Christian J. Barton, Brian H. Wrotniak and David R. Lubans

participation in these activities may be important for future physical activity. Valid and reliable assessments of motor competence are essential for understanding motor skill development across time. While there are numerous skill batteries available for assessing motor competence in youth populations, the

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Montassar Tabben, Laurent Bosquet and Jeremy B. Coquart


This study examined the effect of performance level on the validity and accuracy of middle-distance running-performance predictions obtained from the nomogram of Mercier et al in male runners.


Official French track-running rankings for the 3000-, 5000-, and 10,000-m events from 2006 to 2014 were examined. The performance level was determined from the official reference table of the Fédération Française d’Athlétisme, and the runners were divided in 3 groups (ie, low, moderate, and high levels). Only male runners who performed in the 3 distance events within the same year were included (N = 443). Each performance over any distance was predicted using the nomogram from the 2 other performances.


No difference was found in low- and moderate-performance-level athletes (0.02 ≤ effect size [ES] ≤ 0.06, 95% limits of agreement [LoA] ≤ 6%). By contrast, a small difference in high-performance-level athletes (P < .01, 0.23 ≤ ES ≤ 0.45, 95% LoA ≤ 11.6%) was found.


The study confirms the validity of the nomogram to predict track-running performance with a high level of accuracy, except for male runners with high performance level (ie, national or international). Consequently, the predictions from the nomogram may be used in training programs (eg, to prescribe tempo runs with realistic training velocities) and competitions (eg, to plan realistic split times to reach the best performance).

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Andreas Wolff Hansen, Inger Dahl-Petersen, Jørn Wulff Helge, Søren Brage, Morten Grønbæk and Trine Flensborg-Madsen


The International Physical Activity Questionnaire (IPAQ) is commonly used in surveys, but reliability and validity has not been established in the Danish population.


Among participants in the Danish Health Examination survey 2007–2008, 142 healthy participants (45% men) wore a unit that combined accelerometry and heart rate monitoring (Acc+HR) for 7 consecutive days and then completed the IPAQ. Background data were obtained from the survey. Physical activity energy expenditure (PAEE) and time in moderate, vigorous, and sedentary intensity levels were derived from the IPAQ and compared with estimates from Acc+HR using Spearman’s correlation coefficients and Bland-Altman plots. Repeatability of the IPAQ was also assessed.


PAEE from the 2 methods was significantly positively correlated (0.29 and 0.49; P = 0.02 and P < 0.001; for women and men, respectively). Men significantly overestimated PAEE by IPAQ (56.2 vs 45.3 kJ/kg/day, IPAQ: Acc+HR, P < .01), while the difference was nonsignificant for women (40.8 vs 44.4 kJ/kg/day). Bland-Altman plots showed that the IPAQ overestimated PAEE, moderate, and vigorous activity without systematic error. Reliability of the IPAQ was moderate to high for all domains and intensities (total PAEE intraclass correlation coefficient = 0.58).


This Danish Internet-based version of the long IPAQ had modest validity and reliability when assessing PAEE at population level.