The purpose of this study was to assess the energy demands of a 2,000 meter race simulation (RS) for national level oarswomen; as evaluated on a rowing ergometer (RE). A Progressive Intensity Test (P.I.T.) was also performed on the RE to further evaluate the RS. Six national level oarswomen (X values: age= 24.5 yrs., ht= 179 cm, wt= 75 kg), all current national team candidates (1988), participated in this investigation. A 6 1/2 minute tape recorded water race was used to execute a 2,000 meter RS on a Dr. Gjessing Ergorow ergometer. The tape recording was an actual race tape that was respliced to last exactly 6 1/2 minutes. Metabolic and respiratory exchange variables were continuously monitored by an open circuit method, utilizing a Beckman Metabolic Measurement Cart interfaced on-line with a Hewlitt Packard 3052A data acquisition system. The energy demands were calculated from metabolic variables, total oxygen cost and the analysis of excess post-exercise oxygen consumption (recovery V0₂).Results indicated a mean V0₂max. of 3.85 1.min⁻¹ , mean net V0₂ of 24.48 1 and a mean recovery V0₂ of 4.92 1. This represented the aerobic cost of the event at approximately 80% or 4/5ths of the total energy cost while the anaerobic contribution was approximately 20% of l/5th of the total energy cost. During the RS, V0₂ values rapidly increased to 90% of mean V0₂max. (3.85 l.min⁻¹) in the first two minutes. Mean max. VE (BTPS) RS value was 122.4 1.min⁻¹. VE plateaued after two minutes and remained around 90% of P.I.T. mean max. VE for the final 4 1/2 minutes. Mean max. excess C0₂ for RS was 19.81 ml.kg⁻¹.min⁻¹. The average maximal heart rate, as recorded in the RS was 192.8 bpm. The results of this study indicate the high aerobic demands and tremendous exercise intensity involved in the 2,000 meter RS. / Education, Faculty of / Curriculum and Pedagogy (EDCP), Department of / Graduate

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The purpose of this study was to investigate the effects of trumpet playing upon the heart. A Holter monitor was used to record electrocardiograms (ECGs) to examine the heart's response during musical performances and practice sessions.

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The presence of an increased accumulation of intraabdominal fat (IAF) has been linked to dyslipidemia, hyperinsulinemia, and hyperglycemia, which precede the development of type 2 diabetes and coronary artery disease (CAD). It has been shown that IAF begins depostition during childhood. Human studies suggest that regular endurance exercise, that does not necessarily produce an increase in aerobic capacity, can effectively reduce IAF accumulation during these early years. In contrast to human research, studies using animal models of human disease typically employ extremely large volumes of exercise with the intent to maximize aerobic capacity. The present study examined whether half the amount of endurance training, that was previously reported to induce cardiac hypertrophy and approximately double the aerobic capacity of skeletal muscle in rats, would reduce the growth-related accumulation of IAF in growing female rats. Twenty-two 4-week-old female Sprague-Dawley rats were randomly assigned to a running experimental or a non-running control group. The runners exercised on a treadmill 5 days/week for 60 min/day at a speed of 27m/min and up a 15% grade for 10 weeks. After 10 weeks, the parametrial, omental and mesenteric IAF depots and the heart were excised and weighed. Compared with non-runners, the runners had a significantly lower mean parametrial fat mass (2.22 g vs. 3.13 g, p=0.05) and a higher mean heart weight (0.97 g vs. 0.90 g, p=0.05) at the end of 10 weeks. In addition, the lower mean parametrial fat mass in the runners vs. the non-runners (2.19 g vs. 3.19 g, p=0.02) remained significant even after adjusting for the greater heart weights of the runners. One-half the amount of exercise, that was previously reported to induce cardiac hypertrophy and approximately double the aerobic capacity of skeletal muscle in rats, yielded an 8% greater heart weight and a 29% lower parametrial IAF mass, on average, in growing female rats. In addition, the effects of treadmill running on reducing parametrial fat accumulation were independent of the effects of running on increasing heart weight. Thus, future studies examining the effects of exercise on IAF and other health-related metabolic outcomes in rats may consider using lower-dose endurance training protocols that are not designed to maximize improvements in aerobic capacity. / Graduation date: 2002

The present investigation was designed to elucidate the potential influence of age on speech breathing. Toward this end, 30 men representing three widely different age groups (25, 50, and 75 years) were studied. These individuals were carefully selected to meet stringent criteria, the most important of which related to health and physical characteristics. Speech breathing was studied via anteroposterior diameter changes of the rib cage and abdomen. Recordings were made during extemporaneous speaking and reading and during the performance of various chest wall maneuvers used in the measurement of the speech breathing data. In addition to speech breathing, selected measures of general respiratory function were obtained. These included measures of subdivisions of the lung volume and measures of resting tidal breathing. Results indicated that these 30 subjects were representative of other subjects studied with respect to measures of general respiratory function. Subdivisions of the lung volume were found to differ with age in the manner predicted by previous investigations. Age-related differences were most marked for measures of vital capacity and residual volume. By contrast, there were no age-related differences for measures of resting tidal breathing. Several speech breathing measures were found to differ with age. Age-related differences were usually between the 25- and 75-year-old subject groups and less commonly between the 25- and 50-year-old subject groups. For extemporaneous speaking, differences were found for lung volume excursion, rib cage volume initiation (referenced to the rib cage volume associated with the relaxed configuration of the chest wall), number of syllables per breath group, and lung volume expended per syllable (in percent vital capacity). For reading, differences were found for lung volume expended per syllable (in percent vital capacity). Age-related similarities and differences in general respiratory function and speech breathing are discussed in relation to possible underlying mechanisms. In addition, implications are drawn regarding evaluation and management of individuals with speech breathing disorders.

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