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Emmanuel Jacobs, Ann Hallemans, Jan Gielen, Luc Van den Dries, Annouk Van Moorsel, Jonas Rutgeerts and Nathalie A. Roussel

values. The mean speed of progression (the speed with which the performer moves through space) was calculated by the product of stride length and stride frequency, based on the progression of the ankle marker. Statistical Analyses Statistical analysis was performed in IBM/SPSS (version 22 for Windows

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Michael A. Hemphill and Tom Martinek

engages program leaders in viewing short video clips of their interactions with youth to evaluate their strengths in the four categories (i.e., connection, reciprocity, participation, progression; see Figure  1 ). At the time of this study, Simple Interactions had not been examined in a sport context or

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Oladipo O. Eddo, Bryndan W. Lindsey, Shane V. Caswell, Matt Prebble and Nelson Cortes

investigate the acute changes in the biomechanical parameters of the nonmodified side in participants undergoing dose-specific medial knee thrust, lateral trunk lean, and toe-in foot progression gait modification. It was hypothesized that implementing these gait modification strategies would increase the

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Pete Van Mullem and Chris Croft

progression of collegiate coaches; (b) discuss the role of the coach developer in collegiate sport; and (c) offer practical recommendations for those working as coach developers, to best serve collegiate coaches along their coaching journey. The recommendations support current coaching education literature

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Dimitrios-Sokratis Komaris, Cheral Govind, Andrew Murphy, Alistair Ewen and Philip Riches

movement alterations is to unload the affected joint while keeping the pain experienced to a minimum. 13 – 15 Yet such asymmetric adaptations can lead to the progression of the disease, and even knee replacements in the contralateral joints in patients with end-stage osteoarthritis. 16 , 17 The

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Jill Whitall, Nadja Schott, Leah E. Robinson, Farid Bardid and Jane E. Clark

, Safrit, & Roberts, 1977 ) or correlating motor performance outcomes and physiological traits ( Malina, 1975 ). A more interactionist perspective included considering the effect of the environment on the appearance and progression of gross motor skills. This viewpoint was either from the physical

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Stacey Alvarez-Alvarado, Graig M. Chow, Nicole T. Gabana, Robert C. Hickner and Gershon Tenenbaum

psychobiological model of multistability ( Balagué et al., 2014 ; Hristovski & Balagué, 2010 ). An incremental cycling test was employed to assess the progression of perceived exertion, attentional focus, affective valence, and activation along a parallel increase in HR using VT as a reference point. VT was found

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Tom Mitchell, Adam Gledhill, Mark Nesti, Dave Richardson and Martin Littlewood

development in soccer, with the more recent emphasis being on psychosocial, behavioural, and environmental characteristics that might facilitate talent development and career progression, including youth-to-senior transitions (e.g.,  Gledhill, Harwood, & Forsdyke, 2017 ; Holt & Dunn, 2004 ; Mills et

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Sarah C. Moudy, Neale A. Tillin, Amy R. Sibley and Siobhán Strike

postulated to result from the inability of the prosthesis to generate the propulsion required to continue forward progression 1 or, in bilateral jump landings, from inadequate absorption of high forces through the prosthesis. 6 These interactions between the prosthetic and intact limb mechanics may explain

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Rebecca J. Guthrie, Terry L. Grindstaff, Theodore Croy, Christopher D. Ingersoll and Susan A. Saliba


Individuals with low back pain (LBP) are thought to benefit from interventions that improve motor control of the lumbopelvic region. It is unknown if therapeutic exercise can acutely facilitate activation of lateral abdominal musculature.


To investigate the ability of 2 types of bridging-exercise progressions to facilitate lateral abdominal muscles during an abdominal drawing-in maneuver (ADIM) in individuals with LBP.


Randomized control trial.


University research laboratory.


51 adults (mean ± SD age 23.1 ± 6.0 y, height 173.6 ± 10.5 cm, mass 74.7 ± 14.5 kg, and 64.7% female) with LBP. All participants met 3 of 4 criteria for stabilization-classification LBP or at least 6 best-fit criteria for stabilization classification.


Participants were randomly assigned to either traditional-bridge progression or suspension-exercise-bridge progression, each with 4 levels of progressive difficulty. They performed 5 repetitions at each level and were progressed based on specific criteria.

Main Outcome Measures:

Muscle thickness of the external oblique (EO), internal oblique (IO), and transversus abdominis (TrA) was measured during an ADIM using ultrasound imaging preintervention and postintervention. A contraction ratio (contracted thickness:resting thickness) of the EO, IO, and TrA was used to quantify changes in muscle thickness.


There was not a significant increase in EO (F 1,47 = 0.44, P = .51) or IO (F 1,47 = .30, P = .59) contraction ratios after the exercise progression. There was a significant (F 1,47 = 4.05, P = .05) group-by-time interaction wherein the traditional-bridge progression (pre = 1.55 ± 0.22; post = 1.65 ± 0.21) resulted in greater (P = .03) TrA contraction ratio after exercise than the suspension-exercise-bridge progression (pre = 1.61 ± 0.31; post = 1.58 ± 0.28).


A single exercise progression did not acutely improve muscle thickness of the EO and IO. The magnitude of change in TrA muscle thickness after the traditional-bridging progression was less than the minimal detectable change, thus not clinically significant.