4 research outputs found

    Assessing the Predictive Validity of Actical® Accelerometers for Individuals with Impaired Gait

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    Accelerometers are movement devices that have been proven to be great tools to assess physical activity levels, determine intensity of activities, and measure energy expenditure in the majority of the population. However, these devices may not accurately assess energy expenditure in individuals with altered gait patterns. In order to better understand this discrepancy we are measuring energy costs of low to vigorous Physical Activity (PA) in individuals with altered gait while monitoring omni-directional ambulatory movement using a Actical® Accelerometer (Philips Respironics, Bend, OR) monitoring system to develop a generalizable, useful equation that can better predict energy expenditure. Participants will be assessed and categorized through the 10-meter Walk Test, Timed Up and Go Test, Four-stage Balance Test, 30 second Sit-to-Stand Test, and the Functional Gait Assessment. The participants actual energy expenditure will be measured with an Oxycon Mobile Metabolic System through the following tests; Resting Metabolic Rate (RMR), five minutes of self paced walking, five minutes of brisk-paced treadmill walking, and the Six-Minute-Walk Test. We will then look for correlations between the established categories of participants and their actual energy expenditure which will provide a more accurate equation for estimating energy expenditure with the Actical® Accelerometer. We will be combining this new data with data previously collected in Actical® Accelerometer validity research to have a larger data set to analyze. The intention of this study is to offer a more suitable adapted energy expenditure prediction equation, which will benefit those with physical disabilities in the assessment of physical function in the future

    Cardiovascular Responses to Woodsmoke During Exercise

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    Summers in the Rocky Mountain West are notorious for wildfires. By virtue of event frequency, inhalation of woodsmoke particulate matter (PM) may potentially impact cardiovascular health. While field based studies have provided some insights, well controlled lab studies that quantify cardiovascular function before and after smoke inhalation are the next step. In order to better understand the physiological effects, we examined autonomic-sensitive cardiovascular responses to exogenous particulate during exercise using lab simulated exposure to filtered woodsmoke (Western Larch dried to 15% water content). High heart rate variability (time difference between cardiac cycles in an ECG) and low pulse wave velocity (“PWV”, the speed at which a cardiac impulse is transmitted through arteries) are two metrics of cardiovascular autonomic control that are indicative of good health. Two exercise trials at 70% VO2max cycling for 45-minutes, with smoke (PM 2.5µm,“WS”at 250µg/m3) or without smoke (PM 2.5µm,“CON”at 0µg/m3) were performed with a randomized, cross-over design (n=5). WS and CON trials were separated by one week with significance occuring at

    31st Annual Meeting and Associated Programs of the Society for Immunotherapy of Cancer (SITC 2016): part one

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