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Derek N. Pamukoff, Sarah E. Bell, Eric D. Ryan, and J. Troy Blackburn

Context:

Hamstring musculotendinous stiffness (MTS) is associated with lower-extremity injury risk (ie, hamstring strain, anterior cruciate ligament injury) and is commonly assessed using the damped oscillatory technique. However, despite a preponderance of studies that measure MTS reliably in laboratory settings, there are no valid clinical measurement tools. A valid clinical measurement technique is needed to assess MTS and permit identification of individuals at heightened risk of injury and track rehabilitation progress.

Objective:

To determine the validity and reliability of the Myotonometer for measuring active hamstring MTS.

Design:

Descriptive laboratory study.

Setting:

Laboratory

Participants:

33 healthy participants (15 men, age 21.33 ± 2.94 y, height 172.03 ± 16.36 cm, mass 74.21 ± 16.36 kg).

Main Outcome Measures:

Hamstring MTS was assessed using the damped oscillatory technique and the Myotonometer. Intraclass correlations were used to determine the intrasession, intersession, and interrater reliability of the Myotonometer. Criterion validity was assessed via Pearson product–moment correlation between MTS measures obtained from the Myotonometer and from the damped oscillatory technique.

Results:

The Myotonometer demonstrated good intrasession (ICC3,1 = .807) and interrater reliability (ICC2,k = .830) and moderate intersession reliability (ICC2,k = .693). However, it did not provide a valid measurement of MTS compared with the damped oscillatory technique (r = .346, P = .061).

Conclusions:

The Myotonometer does not provide a valid measure of active hamstring MTS. Although the Myotonometer does not measure active MTS, it possesses good reliability and portability and could be used clinically to measure tissue compliance, muscle tone, or spasticity associated with multiple musculoskeletal disorders. Future research should focus on portable and clinically applicable tools to measure active hamstring MTS in efforts to prevent and monitor injuries.

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Phillip Gribble

Column-editor : Thomas W. Kaminski

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Valeria Rosso, Laura Gastaldi, Walter Rapp, Stefan Lindinger, Yves Vanlandewijck, Sami Äyrämö, and Vesa Linnamo

In cross-country sit-skiing, the trunk plays a crucial role in propulsion generation and balance maintenance. Trunk stability is evaluated by automatic responses to unpredictable perturbations; however, electromyography is challenging. The aim of this study was to identify a measure to group sit-skiers according to their ability to control the trunk. Seated in their competitive sit-ski, 10 male and 5 female Paralympic sit-skiers received 6 forward and 6 backward unpredictable perturbations in random order. k-means clustered trunk position at rest, delay to invert the trunk motion, and trunk range of motion significantly into 2 groups. In conclusion, unpredictable perturbations might quantify trunk impairment and may become an important tool in the development of an evidence-based classification system for cross-country sit-skiers.

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Ariane L. Bedimo-Rung, Jessica L. Thomson, Andrew J. Mowen, Jeanette Gustat, Bradley J. Tompkins, Patricia K. Strikmiller, and Melinda S. Sothern

Background:

Parks provide environments for physical activity, yet little is known about how natural disasters affect them or how these disasters alter physical activity. Our objectives were to (1) describe the development of an instrument to assess park conditions following a hurricane and (2) document the conditions of New Orleans’ parks 3 and 6 months after Hurricane Katrina.

Methods:

A Post-Hurricane Assessment (PHA) instrument was developed and implemented in 54 parks 3 and 6 months post-hurricane.

Results:

Summary scores of the Park Damage Index and the Neighborhood Damage Index showed improvement between 3 and 6 months of data collection. Parks and neighborhoods most affected by the hurricane were located in the most- and least-affluent areas of the city.

Conclusion:

The PHA proved to be a promising tool for assessing park conditions in a timely manner following a natural disaster and allowed for the creation of summary damage scores to correlate to community changes.

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Weimo Zhu and Ang Chen

curriculum choice and teaching behavior. Physical education researchers have been using the VOI as a premium measurement tool to determine teachers’ value orientations and curriculum priorities. Extensive research has been conducted around the world in English-speaking countries with the original inventory

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Robert A.J. Walker and Kazuhiro Harada

environmental determinants of physical activity among Japanese older adults ( Amagasa et al., 2019 ; Hanibuchi et al., 2011 ; Harada et al., 2011 , 2014 ; Kikuchi et al., 2018 ; Oka & Shibata., 2012 ; Togo et al., 2005 ; Yamakita et al., 2015 ). Yet, to date, no comprehensive measurement tool exists to

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Lisa Jasper, Lauren A. Beaupre, John C. Spence, and C. Allyson Jones

adequately post-TKA to achieve health benefits ( Almeida, Khoja, & Piva, 2018 ; Jones & Pohar, 2012 ). Limited research exists regarding the validity of measurement tools used to measure physical activity in older adults following TKA ( Mills, Falchi, Duckett, & Naylor, 2018 ). Triaxial accelerometers are

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Alon Eliakim, Bareket Falk, Neil Armstrong, Fátima Baptista, David G. Behm, Nitzan Dror, Avery D. Faigenbaum, Kathleen F. Janz, Jaak Jürimäe, Amanda L. McGowan, Dan Nemet, Paolo T. Pianosi, Matthew B. Pontifex, Shlomit Radom-Aizik, Thomas Rowland, and Alex V. Rowlands

measurement tool, (c) discusses a new concept or provides a new interpretation or application of an existing concept, or (d) describes a new therapeutic approach or clinical tool. For each specific area, a leading scientist was asked to select 1 to 2 noteworthy publications. The selected publications

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Colin B. Shore, Gill Hubbard, Trish Gorely, Robert Polson, Angus Hunter, and Stuart D. Galloway

(by C.S. and S.G.) with any discrepancies discussed. A Measurement Tool to Assess Systematic Reviews (AMSTAR) criteria were used to grade reviews. AMSTAR grades score as low (0–3), medium (4–7), and high (8–11) quality. 31 Although the AMSTAR tool was developed to assess reviews of randomized

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Sarah Deans, Alison Kirk, Anthony McGarry, and David Rowe

& Granat, 2010 ; Healy et al., 2011 ; Owen et al., 2011 ; Thorp, Owen, Neuhaus, & Dunstan, 2011 ). Outcomes of physical behavior interventions must be evaluated to determine effectiveness, and measurement is an important aspect of evaluation ( Sallis, 2010 ). Selection of an appropriate measurement tool