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Full-Text Articles in Life Sciences

Can Sedentary Behavior Be Made More Active? A Randomized Pilot Study Of Tv Commercial Stepping Versus Walking, Jeremy A. Steeves, David R. Bassett, Eugene C. Fitzhugh, Hollie Raynor, Dixie L. Thompson Aug 2012

Can Sedentary Behavior Be Made More Active? A Randomized Pilot Study Of Tv Commercial Stepping Versus Walking, Jeremy A. Steeves, David R. Bassett, Eugene C. Fitzhugh, Hollie Raynor, Dixie L. Thompson

Kinesiology, Recreation, and Sport Studies Publications and Other Works

Background

There is a growing problem of physical inactivity in America, and approximately a quarter of the population report being completely sedentary during their leisure time. In the U.S., TV viewing is the most common leisure-time activity. Stepping in place during TV commercials (TV Commercial Stepping) could increase physical activity. The purpose of this study was to examine the feasibility of incorporating physical activity (PA) into a traditionally sedentary activity, by comparing TV Commercial Stepping during 90 min/d of TV programming to traditional exercise (Walking).

Methods

A randomized controlled pilot study of the impact of 6 months of ...


Sensitivity Of The Wolf’S And Rostein’S Algorithms To Evaluate Local Dynamic Stability From Small Gait Data Sets, Fabien Cignetti, Leslie M. Decker, Nicholas Stergiou May 2012

Sensitivity Of The Wolf’S And Rostein’S Algorithms To Evaluate Local Dynamic Stability From Small Gait Data Sets, Fabien Cignetti, Leslie M. Decker, Nicholas Stergiou

Journal Articles

The Wolf’s (W-algorithm) and Rosenstein’s (R-algorithm) algorithms have been used to quantify local dynamic stability (largest Lyapunov exponent, λ 1) in gait, with prevalence of the latter one that is considered more suitable for small data sets. However, such a claim has never been investigated. To address it, the λ 1 of the Lorenz attractor was estimated using small data sets and varied delays and embedding dimensions. Overall, the λ 1 estimates from the R-algorithm got closer to the theoretical exponent than those from the W-algorithm. The W-algorithm also overestimated λ 1 while ...


Comparative Analysis Of The Energy Expenditure In Walking And The Running In Young Men, Lucas De Castro Cardoso, Marcelo De Castro Cesar, Pamela Roberta Gomes Gonelli, Claudio Alexandre Gobatto Mar 2012

Comparative Analysis Of The Energy Expenditure In Walking And The Running In Young Men, Lucas De Castro Cardoso, Marcelo De Castro Cesar, Pamela Roberta Gomes Gonelli, Claudio Alexandre Gobatto

International Journal of Exercise Science: Conference Proceedings

Walking below 6 km/h and running above 8 km/h are efficient effort intensities to maintain the economy of energy expenditure in the mechanical work. However, in the intermediate range (between the transition of the walking to running), the mechanical work against the energy expenditure still requires analysis. So, the purpose of the present study was to compare the energy expenditure between walking and running in the load work immediately below of the inversion point in the caloric expenditure. Ten young male subjects participated of the study (24.2 ± 2.04 years; 180.7 ± 3.8 cm; 79.5 ...


Adaptations To Stride Patterns And Head Movements During Walking In Persons With And Without Multiple Sclerosis, Jebb Grigory Remelius Feb 2012

Adaptations To Stride Patterns And Head Movements During Walking In Persons With And Without Multiple Sclerosis, Jebb Grigory Remelius

Open Access Dissertations

Many people with multiple sclerosis (MS) have difficulty with walking, which can decrease their sense of mobility. Gait stability was investigated by studying stride parameters and head movements at preferred and fixed speeds in those with MS. First, walking gait data were recorded at preferred and fixed walking speeds from 19 individuals with MS and 19 controls. Traditional gait parameters were compared, as was swing foot to center of mass (CoM) timing at mid-swing. Second, walking gait data in healthy young adults (n=20) were recorded at preferred speed and while stepping over an obstacle. Study 2 developed novel swing ...


Frontal Joint Dynamics When Initiating Stair Ascent From A Walk Versus A Stand, Srikant Vallabhajosula, Jenna M. Yentes, Nicholas Stergiou Feb 2012

Frontal Joint Dynamics When Initiating Stair Ascent From A Walk Versus A Stand, Srikant Vallabhajosula, Jenna M. Yentes, Nicholas Stergiou

Journal Articles

Ascending stairs is a challenging activity of daily living for many populations. Frontal plane joint dynamics are critical to understand the mechanisms involved in stair ascension as they contribute to both propulsion and medio-lateral stability. However, previous research is limited to understanding these dynamics while initiating stair ascent from a stand. We investigated if initiating stair ascent from a walk with a comfortable self-selected speed could affect the frontal plane lower-extremity joint moments and powers as compared to initiating stair ascent from a stand and if this difference would exist at consecutive ipsilateral steps on the stairs. Kinematics data using ...


School Program Planning To Increase Active Transport To School, Brenda Aguilar Jan 2012

School Program Planning To Increase Active Transport To School, Brenda Aguilar

McNair Poster Presentations

Studies have shown that active transport is known to increase physical activity of children, decrease traffic congestion and the production of greenhouse gasses. This study examines active transport to school (ATS) [walking, biking, or other self-powered wheels to school] among elementary students. Through the Nevada Moves Day program an increase proportion of elementary students who use ATS was expected.

This study was done at two elementary schools, one being the intervention school that participated in the Nevada Moves Day, and a control school, which did not participate. Data was collected over a three week period. Students using active transport and ...