Chris A. McGibbon

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Gait changes in the elderly, such as reduced step length and walking speed, are well documented but not well understood. This review explores the hypothesis that neuromuscular adaptations are a response to age-related impairments and play a key role in causing gait changes in the elderly, and that different neuromuscular adaptations may exist depending on(More)
OBJECTIVE To compare the effects of traditional Chinese acupuncture with sham acupuncture on upper-extremity (UE) function and quality of life (QOL) in patients with chronic hemiparesis from stroke. DESIGN A prospective, sham-controlled, randomized controlled trial (RCT). SETTING Patients recruited through a hospital stroke rehabilitation program. (More)
BACKGROUND A supportive social environment is critical for those with HIV/AIDS. In KwaZulu-Natal, in South Africa, antiretroviral therapy is available to some HIV-positive individuals. Antiretroviral adherence is an important issue for limiting HIV infection. Adherence to therapy may be linked to social support, particularly amidst the stigma prevalent in(More)
Two numerical homotopy invariants of phantom maps, the Gray indexG(f) and the essential category weight E(f), are studied. The possible values of these invariants are determined. In certain cases bounds on these values are given in terms of rational homotopy data. Examples are provided showing that the Gray index can take any positive finite value. For(More)
OBJECTIVE To determine whether the adduction moment at the knee during locomotor activity contributes to the development of future chronic knee pain. METHODS We studied 132 community-dwelling elders who had undergone a full kinetic and kinematic motion analysis while performing 4 different activities: standing, walking, rising from a chair, and descending(More)
OBJECTIVE Few studies exist on gait adaptation caused by knee osteoarthritis (OA), and those have only explored adaptations of the kinematics and kinetics of the knee joint itself. We characterize ankle, knee, hip, and low back mechanical energy expenditures (MEE) and compensations (MEC) during gait in patients with knee OA. METHODS Thirteen elderly(More)
OBJECTIVE To determine whether high-intensity functional training (FT) or strength training (ST) better enables impairment, disability, and functional gains among disabled community-dwelling elders. DESIGN Randomized, blinded, prospective clinical trial in a large, tertiary care outpatient rehabilitation department. Fifteen elders (62-85 yrs old) referred(More)
Studies investigating chair rise (CR) strategies in older adults, including the identification of CR strategies in the clinical setting, are limited. We identified biomechanical differences between CR strategies performed by older adults. The "healthy" momentum transfer (MT), the exaggerated trunk flexion (ETF), and the dominant vertical rise (DVR) CR(More)
Adherence to anti-tuberculosis (TB) medications is a critical issue in limiting the spread of the disease throughout the world. In South Africa, medications to treat TB are available at no cost. The purpose of this study was to examine the characteristics of medication adherence in a sample of patients diagnosed with TB (N = 159). The relationships among(More)
Symptom management in HIV/AIDS is a critical issue that influences the quality of life of those living with the disease. Although the goals of treating the numbers living with HIV/AIDS have not yet been achieved, availability of antiretroviral therapies (ARVs) has been expanded to many clinical settings in KwaZulu-Natal, the epicenter of HIV infection in(More)