Medicine and Health Sciences Commons^™

Muscle-Specific Contributions To Lower Extremity Net Joint Moments While Squatting With Different External Loads, Kristof Kipp, Hoon Kim, William I. Wolf

Exercise Science Faculty Research and Publications

The purpose of this study was to determine muscle-specific contributions to lower extremity net joint moments (NJMs) during squats with different external loads. Nine healthy subjects performed sets of the back squat exercise with 0, 25, 50, and 75% of body mass as an added external load. Motion capture and force plate data were used to calculate NJMs and to estimate individual muscle forces via static optimization. Individual muscle forces were multiplied by their respective moment arms to calculate the resulting muscle-specific joint moment. Statistical parametric mapping (α = 0.05) was used to determine load-dependent changes in the time series …

Accuracy Of Body Mass Index In Categorizing Weight Status In Children With Intellectual And Developmental Disabilities, Michele Polfuss, Bethany Forseth, Dale A. Schoeller, Chiang-Ching Huang, Andrea Moosreiner, Paula E. Papanek, Kathleen J. Sawin, Kimberley Zvara, Linda Bandini

Exercise Science Faculty Research and Publications

PURPOSE:

To identify the accuracy of Body Mass Index (BMI) to categorize body weight in a sample of children with spina bifida and Down syndrome as compared to typically developing peers.

METHODS:

A secondary analysis of 32 children with spina bifida, Down syndrome or no chronic illness. A calculated BMI was plotted on the Centers for Disease Control and Prevention age- and sex-specific BMI growth charts to determine each child’s weight status. Percentage of body fat, obtained by labeled water, was plotted on two different body fat percentile reference curves, one derived from a whole body measure (DXA) of body …

Reliance On Auditory Feedback In Children With Childhood Apraxia Of Speech, Jenya Iuzzini-Seigel, Tiffany P. Hogan, Anthony J. Guarino, Jordan R. Green

Speech Pathology and Audiology Faculty Research and Publications

Children with childhood apraxia of speech (CAS) have been hypothesized to continuously monitor their speech through auditory feedback to minimize speech errors. We used an auditory masking paradigm to determine the effect of attenuating auditory feedback on speech in 30 children: 9 with CAS, 10 with speech delay, and 11 with typical development. The masking only affected the speech of children with CAS as measured by voice onset time and vowel space area. These findings provide preliminary support for greater reliance on auditory feedback among children with CAS.

Learning outcomes: Readers of this article should be able to (i) …

Speech-Language Pathologists Collaborating With Head Start To Improve Children’S Early Language And Literacy Skills: Efficacy And Intensity Effects, Maura Jones Moyle, Sue Berman

Speech Pathology and Audiology Faculty Research and Publications

The current study examined the efficacy of a speech-language pathologist–designed and implemented emergent literacy program for Head Start preschoolers and the influence of intensity of intervention on children’s gains. Results indicated that children who participated in the intervention program exhibited greater gains than the control group on oral language, phonological awareness, and alphabet/print knowledge. Children who received a higher dosage of intervention made greater gains on vocabulary and oral language compared to the lower intensity group. Speech-language pathologists may be valuable collaborators in promoting emergent literacy skills in at-risk children.

Time To Task Failure Differs With Load Type When Old Adults Perform A Submaximal Fatiguing Contraction, Sandra K. Hunter, Ludovic Rochette, Ashley Critchlow, Roger M. Enoka

Exercise Science Faculty Research and Publications

Young adults exhibit a longer time to task failure when performing a submaximal isometric contraction by pushing against a force transducer (force task) than when supporting an equivalent inertial load (position task). The purpose of this study was to compare the time to failure for old adults when they performed a force task and a position task with the elbow flexor muscles. Eighteen old adults (72 ± 4 years) performed the force and position tasks at 20% maximal voluntary contraction (MVC) force until task failure. The time to task failure was briefer for the position task (10.6 ± 6.1 min) …