Medicine and Health Sciences Commons^™

Physical Function Across The Lifespan In Adults With Multiple Sclerosis: An Application Of The Short Physical Performance Battery, Brenda Jeng, Petra Šilić, Rachel E. Bollaert, Brian M. Sandroff, Robert W. Motl

Exercise Science Faculty Research and Publications

Background

Multiple sclerosis (MS) typically has its onset in early and middle adulthood, but the population is steadily becoming more dominated by older adults. One of the primary consequences of both MS and aging involves declines of lower extremity physical function and mobility. This cross-sectional study compared physical function status based on Short Physical Performance Battery (SPPB) summary and component scores between persons with MS and healthy controls across 6 age groups. We further examined associations between SPPB summary scores and component scores as well as associations between summary scores and measures of physical and cognitive function for identifying the …

Sex Differences In The Speed–Duration Relationship Of Elite Runners Across The Lifespan, Timothy J. Fulton, Christopher W. Sundberg, Blaine E. Arney, Sandra K. Hunter

Exercise Science Faculty Research and Publications

Purpose

To determine if the speed–duration relationship is altered with age and sex of elite Master’s runners.

Methods

The world’s top 10 performances for men and women in three events (800, 1500, and 5000 m) across six age groups (18–34 yr, 40–49 yr, 50–59 yr, 60–69 yr, 70–79 yr, and 80–89 yr) were analyzed from public data to establish theoretical models of the speed–duration relationship. Critical speed (CS) and the curvature constant (D′) were estimated by fitting the average speeds and performance times with a two-parameter hyperbolic model.

Results

Critical speed expressed relative to the 18- to 34-yr-olds, …

Mechanisms Of The Age-Related Power Reduction In The Knee Extensor Muscles Of Men And Women, David Wrucke

Master's Theses (2009 -)

The mechanisms for the loss in limb muscle power output in old (60-79 years) and very old adults (≥80 years) and whether these mechanisms differ between older men and women are not well-understood. The aims of the thesis are to 1) compare peak power output of the knee extensor muscles between young, old, and very old adults and 2) determine the physiological mechanisms for the age-related loss of power in men compared with women. 31 young (22.9±3.0 years, 16 men), 83 old (70.4±4.9 years, 44 men), and 16 very old adults (85.8±4.2 years, 7 men) performed maximal isokinetic contractions at …

Cognitive Challenge As A Probe To Expose Sex- And Age-Related Differences During Static Contractions, Hugo M. Pereira, Sandra K. Hunter

Exercise Science Faculty Research and Publications

Despite activities of daily living being frequently performed simultaneously with a cognitive task, motor function is often investigated in isolation, which can hinder the applicability of findings. This brief review presents evidence that 1) performing a cognitive challenge simultaneously with a motor task can negatively impact force steadiness and fatigability of limb muscles during a static contraction, 2) the negative impact on old adults (>65 years old), particularly older women is greater than young when a cognitive challenge is simultaneously performed with a static motor task, 3) age-related mechanisms potentially explain impairments in motor performance in the presence of …