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Dawn T. Gulick

was designed to establish the reliability and validity of a new orthopedic device to measure linear translation of the tibia on the femur (ACL testing). Figure 1 —Lachman test with Mobil-Aider device. Methods The gold standard used to assess the Mobil-Aider ™ was the Zeiss Smartzoom 5 Microscope

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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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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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Tiago V. Barreira, Robert M. Brouillette, Heather C. Foil, Jeffrey N. Keller and Catrine Tudor-Locke

The purpose of this study was to compare the steps/d derived from the ActiGraph GT3X+ using the manufacturer’s default filter (DF) and low-frequency-extension filter (LFX) with those from the NL-1000 pedometer in an older adult sample. Fifteen older adults (61–82 yr) wore a GT3X+ (24 hr/day) and an NL-1000 (waking hours) for 7 d. Day was the unit of analysis (n = 86 valid days) comparing (a) GT3X+ DF and NL-1000 steps/d and (b) GT3X+ LFX and NL-1000 steps/d. DF was highly correlated with NL-1000 (r = .80), but there was a significant mean difference (–769 steps/d). LFX and NL-1000 were highly correlated (r = .90), but there also was a significant mean difference (8,140 steps/d). Percent difference and absolute percent difference between DF and NL-1000 were –7.4% and 16.0%, respectively, and for LFX and NL-1000 both were 121.9%. Regardless of filter used, GT3X+ did not provide comparable pedometer estimates of steps/d in this older adult sample.

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Øystein Sylta, Espen Tønnessen and Stephen Seiler


The purpose of this study was to validate the accuracy of self-reported (SR) training duration and intensity distribution in elite endurance athletes.


Twenty-four elite cross-country skiers (25 ± 4 y, 67.9 ± 9.88 kg, 75.9 ± 6.50 mL · min−1 · kg−1) SR all training sessions during an ~14-d altitude-training camp. Heart rate (HR) and some blood lactate measurements were collected during 466 training sessions. SR training was compared with recorded training duration from HR monitors, and SR intensity distribution was compared with expert analysis (EA) of all session data.


SR training was nearly perfectly correlated with recorded training duration (r = .99), but SR training was 1.7% lower than recorded training duration (P < .001). SR training duration was also nearly perfectly correlated (r = .95) with recorded training duration >55% HRmax, but SR training was 11.4% higher than recorded training duration >55% HRmax (P < .001) due to SR inclusion of time <55% HRmax. No significant differences were observed in intensity distribution in zones 1–2 between SR and EA comparisons, but small discrepancies were found in zones 3–4 (P < .001).


This study provides evidence that elite endurance athletes report their training data accurately, although some small differences were observed due to lack of a SR “gold standard.” Daily SR training is a valid method of quantifying training duration and intensity distribution in elite endurance athletes. However, additional common reporting guidelines would further enhance accuracy.

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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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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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Kate M. Sansum, Max E. Weston, Bert Bond, Emma J. Cockcroft, Amy O’Connor, Owen W. Tomlinson, Craig A. Williams and Alan R. Barker

Maximal oxygen uptake ( V ˙ O 2 max ), typically expressed in relation to a measure of body size, is the “gold-standard” measure of cardiorespiratory fitness (CRF) ( 10 ). A valid measurement of V ˙ O 2 max is important in children and adolescents because a high CRF in youth is associated with a