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Articles 121 - 124 of 124
Full-Text Articles in Rehabilitation and Therapy
Fatigability Of The Elbow Flexor Muscles For A Sustained Submaximal Contraction Is Similar In Men And Women Matched For Strength, Sandra K. Hunter, Ashley Critchlow, In-Sik Shin, Roger M. Enoka
Fatigability Of The Elbow Flexor Muscles For A Sustained Submaximal Contraction Is Similar In Men And Women Matched For Strength, Sandra K. Hunter, Ashley Critchlow, In-Sik Shin, Roger M. Enoka
Exercise Science Faculty Research and Publications
The purpose of this study was to compare the time to task failure for a submaximal fatiguing contraction sustained with the elbow flexor muscles by men and women who were matched for strength (n = 20, 18-35 yr). The maximal torque exerted at the wrist was similar for the men and women [64.5 ± 8.7 (SD) vs. 64.5 ± 8.3 N·m; P > 0.05], which meant that the average torque exerted during the fatiguing contraction [20% of maximum voluntary contraction (MVC)] was similar for the two sexes. The time to task failure was similar for these strength-matched men and women …
Ventilatory Phenotypes Among Four Strains Of Adult Rats., Matthew Hodges, Hubert Forster, Paula E. Papanek, Melinda R. Dwinell, Genevieve E. Hogan
Ventilatory Phenotypes Among Four Strains Of Adult Rats., Matthew Hodges, Hubert Forster, Paula E. Papanek, Melinda R. Dwinell, Genevieve E. Hogan
Exercise Science Faculty Research and Publications
Our purpose in this study was to identify different ventilatory phenotypes among four different strains of rats. We examined 114 rats from three in-house, inbred strains and one outbred strain: Brown Norway (BN;n = 26), Dahl salt-sensitive (n = 24), Fawn-hooded Hypertensive (FHH: n = 27), and outbred Sprague-Dawley rats (SD; n = 37). We measured eupneic (room air) breathing and the ventilatory responses to hypoxia (12% O2-88% N2), hypercapnia (7% CO2), and two levels of submaximal exercise. Primary strain differences were between BN and the other strains. BN rats had a …
Angiotensin Ii And Vegf Are Involved In Angiogenesis Induced By Short-Term Exercise Training, Sandra L. Amaral, Paula E. Papanek, Andrew S. Greene
Angiotensin Ii And Vegf Are Involved In Angiogenesis Induced By Short-Term Exercise Training, Sandra L. Amaral, Paula E. Papanek, Andrew S. Greene
Exercise Science Faculty Research and Publications
Results from our laboratory have suggested a pathway involving angiotensin II type 1 (AT1) receptors and vascular endothelial growth factor (VEGF) in angiogenesis induced by electrical stimulation. The present study investigated if similar mechanisms underlie the angiogenesis induced by short-term exercise training. Seven days before training and throughout the training period, male Sprague-Dawley rats received either captopril or losartan in their drinking water. Rats underwent a 3-day treadmill training protocol. The tibialis anterior and gastrocnemius muscles were harvested under anesthesia and lightly fixed in formalin (vessel density) or frozen in liquid nitrogen (VEGF expression). In controls, treadmill training …
Gender-Specific Protection From Microvessel Rarefaction In Female Hypertensive Rats, Paula E. Papanek, Mark J. Rieder, Julian H. Lombard, Andrew S. Greene
Gender-Specific Protection From Microvessel Rarefaction In Female Hypertensive Rats, Paula E. Papanek, Mark J. Rieder, Julian H. Lombard, Andrew S. Greene
Exercise Science Faculty Research and Publications
Epidemiologic studies reveal that women have a significantly lower age-adjusted morbidity and mortality from cardiovascular disease than men, suggesting that gender is a cardiovascular disease risk factor. The mechanism of the “gender protection” is unknown. In this study, we investigated the microvascular remodeling in reduced renal mass plus a high salt (4.0% NaCl) diet model of hypertension (RRM + HS). We hypothesized that women would be protected from the increase in blood pressure and from the microvascular rarefaction associated with RRM + HS hypertension. Studies were designed to determine whether female rats were less susceptible to changes in microvessel density …