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Darren Steeves, Leo J. Thornley, Joshua A. Goreham, Matthew J. Jordan, Scott C. Landry and Jonathon R. Fowles

tests was investigated to determine their utility in a kayak-specific testing program. Methods Participants The study consisted of a reliability segment followed by a validity segment. Highly trained male and female kayakers were recruited for both segments of this investigation. All participants were

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Scott A. Conger, Alexander H.K. Montoye, Olivia Anderson, Danielle E. Boss and Jeremy A. Steeves

associated with step counts in wrist-worn devices at slower walking speeds ( Chen, Kuo, Pellegrini, & Hsu, 2016 ; Huang, Xu, Yu, & Shull, 2016 ; Storm, Heller, & Mazza, 2015 ). Speed of movement has been an important variable to consider in determining the validity and accuracy of these accelerometer

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Bronwyn K. Clark, Nyssa T. Hadgraft, Takemi Sugiyama and Elisabeth A. Winkler

monitor, similarly experienced lower accuracy in location classification when participants transitioned between locations versus when they remained in the same location continuously ( Magistro et al., 2018 ). These findings suggest it may be possible to use Bluetooth to derive valid measures of office

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Nadia C. Valentini, Lisa M. Barnett, Paulo Felipe Ribeiro Bandeira, Glauber Carvalho Nobre, Larissa Wagner Zanella and Rodrigo Flores Sartori

limited to the population in which the instrument was validated; consequently, content and construct validity must be addressed in other cultures ( Vallerand & Halliwell, 1989 ; Yun & Ulrich, 2002 ). A recent validation investigated the use of the 12 FMS items as part of the PMSC in around 200 Portuguese

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Yuri Hosokawa, William M. Adams and Douglas J. Casa

Context: It is unknown how valid esophageal, rectal, and gastrointestinal temperatures (TES, TRE, and TGI) compare after exercise-induced hyperthermia under different hydration states. Objective: To examine the differences between TES, TRE, and TGI during passive rest following exercise-induced hyperthermia under 2 different hydration states: euhydrated (EU) and hypohydrated (HY). Design: Randomized crossover design. Setting: Controlled laboratory setting. Participants: 9 recreationally active male participants (mean ± SD age 24 ± 4 y, height 177.3 ± 9.9 cm, body mass 76.7 ± 11.6 kg, body fat 14.7% ± 5.8%). Intervention: Participants completed 2 trials (EU and HY) consisting of a bout of treadmill exercise (a 10-min walk at 4.8-7.2 km/h at a 5% grade followed by a 20-min jog at 8.0-12.1 km/h at a 1% grade) in a hot environment (ambient temperature 39.3 ± 1.0°C, relative humidity 37.6% ± 6.0%, wet bulb globe temperature 31.3 ± 1.5°C) followed by passive rest. Main Outcome Measures: Root-mean-squared difference (RMSD) was used to compare the variance of temperature readings at corresponding time points for TRE vs TGI, TRE vs TES, and TGI vs TES in EU and HY. RMSD values were compared using 3-way repeated-measures ANOVA. Post hoc analysis of significant main effects was done using Tukey honestly significant difference with significance set at P < .05. Results: RMSD values (°C) for all device comparisons were significantly different in EU (TRE-TGI, 0.11 ± 0.12; TRE-TES, 1.58 ± 1.01; TGI-TES, 2.04 ± 1.19) than HY (TRE-TGI, 0.22 ± 0.28; TRE-TES, 1.27 ± 0.61; TGI-TES, 1.16 ± 0.76) (P < .01). Across the 45-min bout of passive rest, there were no differences in TRE, TGI, and TES between EU and HY trials (P = .468). Conclusions: During passive rest after exercise in the heat, TRE and TGI were in good agreement when tracking body temperature, with a better agreement appearing in those maintaining a state of euhydration versus those who became hypohydrated during exercise; however, this small difference does not appear to be of clinical significance. The large differences were observed when comparing TGI and TRE with TES.

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Miguel A. de la Cámara, Sara Higueras-Fresnillo, Verónica Cabanas-Sánchez, Kabir P. Sadarangani, David Martinez-Gomez and Óscar L. Veiga

, self-reported sitting/reclining time is reported as representative of SB. Different studies showed that a single question for measuring SB has moderate to good reliability and moderate validity against accelerometers for estimating total sitting time in adults. 27 , 28 For the single question of the

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Paul F.J. Merkes, Paolo Menaspà and Chris R. Abbiss

meters in which power output is calculated with the use of strain gages. To date, the validity of power output calculated by the Velocomp PowerPod power meter is unknown. Therefore, the aim of this study was to determine the validity of the Velocomp PowerPod power meter during field cycling tests and

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Alejandro Pérez-Castilla, Belén Feriche, Slobodan Jaric, Paulino Padial and Amador García-Ramos

concurrent validity of linear velocity transducer with respect to the standard and presumably accurate force platform method for testing loaded vertical jumps still remains underexplored. Based on considerations above, we aimed to explore the concurrent validity of linear velocity transducer regarding the

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Cody L. Sipe, Kevin D. Ramey, Phil P. Plisky and James D. Taylor

limb while in a single-limb stance on a centralized platform. It was developed from the star excursion balance test (SEBT) in an attempt to address common sources of error and method variation noted in the SEBT ( Plisky, Gorman, Butler, Underwood, & Elkins, 2009 ). The SEBT has been shown to be a valid

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Damir Zubac, Drazen Cular and Uros Marusic

Olympic combat athletes, 8 an ongoing debate persists in the literature regarding noninvasive whole-body fluid-deficit characterization in this athletic community. For example, a cross-sectional study of Fernandez-Elias et al 9 recommended U SG as a valid alternative to track fluid deficit in Spanish