Donald C McKenzie

..The purpose of the present study was to examine factors associated with breast cancer patients' preference for two types of exercise training during chemotherapy...

..As a result of these changes, asthmatic athletes are being managed differently based on a World Anti-Doping Agency directive that has no foundation in pharmacological science or in clinical practice...

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..We observed a preserved muscle metaboreflex in mild-to-severe COPD, suggesting the metaboreflex is not a contributing factor to the development of exercise intolerance in this population...

..The findings from this study point to a female diaphragm that is more resistant to fatigue relative to their male counterparts...

..We asked whether submaximal exercise with chest wall restriction (CWR), as a model of restrictive pulmonary disease, would result in fatigue of the diaphragm in healthy humans...

..Transient interstitial pulmonary edema did not occur following sustained steady-state cycling exercise in N or H, indicating that transient edema does not result from pulmonary capillary leakage during sustained submaximal exercise...

..05); however, the magnitude of the response was unchanged following IH. Our findings indicate that ten daily hypoxia exposures does not alter the CBF response to submaximal exercise...

..Collectively, these findings suggest that women utilize a greater majority of their ventilatory reserve compared to men and this is associated with a higher cost of breathing...

..30) and day 12 (r = 0.47; P > 0.05). Our findings point to a lack of functional significance of increasing HVR via intermittent hypoxia on ventilatory responses to exercise at sea level...

..8 +/- 1.8, P = 18.5 +/- 1.8%) or 60% power (D = 20.3 +/- 2.0, P = 20.1 +/- 2.1%). CONCLUSION: A therapeutic dose of pseudoephedrine hydrochloride does not affect anaerobic cycling performance or aerobic cycling efficiency...

..Mean lung density did not change from pre (0.138 +/- 0.014 g/ml)- to postexercise (0.137 +/- 0.011 g/ml). These findings suggest that pulmonary edema does not occur in highly trained females following intense normobaric hypoxic exercise...

..This review will examine the use of IBAs in the asthmatic athlete, the variability that exists between countries and sport, and outline a plan to justify the use of these medications...

..This study determined the dose-response effects of inhaled salbutamol (SAL) on time-trial performance and urine concentrations of SAL (cSAL)...

..These results also suggest that the two methods of measuring CO(2) response are not completely concordant and that the changes in CO(2) control do not correlate with the increase in the HVR...

..These results suggest that during cycling exercise at intensities of 75% VO2max or less, regular training may result in higher %ENT and that ENT is not transferable to an unfamiliar mode of exercise using different muscle groups...

..We interpret these observations to mean that other factors are more important in determining hypoxic ventilatory control than physical conditioning per se...

..Our findings indicate that the vascular processes required to control blood flow and oxygen supply to cerebral tissue in a healthy human are hindered following exposure to 12 days of isocapnic intermittent hypoxia...

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..82) during the post-IH trial. Following IH the rise in MSNA burst frequency was strongly related to the change in HVR (r = 0.79, P < 0.05) suggesting that these sympathetic and ventilatory responses may have common central control...

..This suggests that arterial oxygen pressure is only minimally mediated by cardiac output...

..It also appears that patients with cardiac and noncardiac transplants have an increased reliance on anaerobic energy systems during exercise conditions compared with healthy control subjects...

..The purpose of this study was to examine the changes in hemoglobin (Hb) levels in the Supervised Trial of Aerobic versus Resistance Training (START) and to determine its association with changes in VO(2peak)...

..We attribute our findings to a reduced activity of chemosensitive afferents within the inspiratory muscles and may provide a mechanism for some of the whole-body exercise endurance improvements associated with IMT...

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..CONCLUSION: It appears that the prevalence of EIAH in women is slightly greater than the 50% prevalence value that is typically reported for highly fit men...

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..All of these maladaptations may influence performance...

..This research supports the implementation of interval training for highly functional patients with coronary artery disease...

..It was hypothesized that as climbing difficulty increased, oxygen consumption ([V02] and heart rate would increase, and that climbing would require utilization of a significant fraction of maximal cycling values...

..Cases usually resolve within 24 hours. In some cases, diuretics have been used, but there are no data as to their efficacy. Nifedipine has been used to prevent recurrence, but there is only anecdotal evidence to support its use...

..There is no evidence that the short exposure to hypoxia as part of HVR measurement is a co-intervention when measured repeatedly over 5 days in physiological studies...

..Splenic release of erythrocytes has no effect on indirect measures of plasma volume...

..As such, this is a phenomenon of significance to pulmonary and exercise physiologists. This possibility warrants further study in the area with more precise measurement tools than has previously been undertaken...

..To determine which mode of exercise is preferred by breast cancer survivors and to evaluate this response between graded exercise testing on a treadmill and on a cycle ergometer...

..To document changes in body composition and body mass in male and female tree planters...

..To determine the effect of formoterol (formoterol fumarate dihydrate) on the aerobic and anaerobic capacities of highly trained athletes...

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..Therefore, in comparison to previous reports of EIAH in adult women with similar V'(O(2)peak), EIAH does not appear to occur in the prepubescent female population...

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..Activity specific linear regression equations are proposed as a tool to improve the measurement of EE using the Tritrac in the field...

..The policy of requiring Olympic athletes to demonstrate the presence of asthma, exercise-induced bronchoconstriction, or AHR to be approved to inhale beta(2)-agonists will continue...