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Full-Text Articles in Medicine and Health Sciences
Knee Extensor Fatigability During Different Resistance Exercise Protocols In Young And Old Adults, Jose Delgadillo
Knee Extensor Fatigability During Different Resistance Exercise Protocols In Young And Old Adults, Jose Delgadillo
Master's Theses (2009 -)
Aging is associated with decreased muscle strength, power, and contraction velocity, and increased fatigability of the lower limb muscles during dynamic contractions. The aims of this thesis were to compare young in and old men and women in: (1) fatigability of the knee extensors for two types of dynamic fatiguing protocols that are the basis of resistance training protocols, and (2) the central and peripheral mechanisms of fatigue during the two types of dynamic fatiguing protocols. Twenty young (19-24, 22.2 ± 1.3 years, men = 10) and twenty old adults (64-85, 73.8 ± 5.4, men = 10) performed: two different …
Change In Bone Mineral Density Among High Frequency Apheresis Blood Donors, Walter Bialkowski
Change In Bone Mineral Density Among High Frequency Apheresis Blood Donors, Walter Bialkowski
Dissertations (1934 -)
Exposure to citrate anticoagulant during apheresis blood donation induces significant decreases in serum ionized calcium with subsequent perturbations to parathyroid hormone, vitamin D, and markers of bone remodeling. Cross-sectional studies of bone mineral density (BMD) among apheresis donors exhibit conflicting results. Resolving the potential impact of the highest apheresis donation frequency represents a significant knowledge gap in ensuring adequate protections for volunteer apheresis blood donors. ALTRUYST (NCT02655055) was a randomized, longitudinal, controlled clinical trial designed to determine if repeated exposure to citrate through apheresis donation reduces BMD. Male donors, 18-65 years of age with no more than five previous apheresis …
Motor Compensation During Lower Limb Pedaling After Stroke, Brice Thomas Cleland
Motor Compensation During Lower Limb Pedaling After Stroke, Brice Thomas Cleland
Dissertations (1934 -)
Long-term motor dysfunction in the lower limb is common after stroke. One potential contributor is motor compensation, a behavior in which functions originally performed by the paretic limb are performed by the non-paretic limb. Compensation in chronic stroke may contribute to long-term motor dysfunction by limiting functional ability, impairing future recovery, and eliciting maladaptive neuroplasticity. The purpose of this dissertation was to describe the impact of compensation on motor function and brain activation during lower limb pedaling and identify elements that produce this behavior. To achieve this purpose, we evaluated muscle activation and motor performance when compensation was prevented. During …