MAXIMAL EXERCISE TESTING â€“AS IT ELICITS A VARIED CARDIOVASCULAR RESPONSE IN PERIMENOPAUSAL WOMEN DURING PROLIFERATIVE PHASE OF MENSTRUAL CYCLE
Background: The role of hormones on lung function tests was wellâ€‘known in the normal course of the menstrual cycle. Significant increase in both progesterone (37%) and estradiol (13.5%), but no change in plasma follicle stimulating hormone and luteinizing hormone was observed in exercising women in previous studies. Therefore, this study was intended to see the limitations of the cardiovascular system in adaptability to exercise in proliferative phase of the menstrual cycle in perimenopausal obese woman. Methods: Healthy young adult females between 42 and 45 years who regularly undergo training and participate in competitive middle distance running events for at least past 3 years were considered in the control, whereas the study group, consisting of obese women did not have any such regular exercise program. The two groups were in perimenopausal age group. They were made to undergo maximal treadmill testing. Results: It was observed that exercise per se does not cause a statistically significant change in cardiovascular function parameters but Maximum oxygen pulse is an index representing both stroke and A-V oxygen difference. A higher value in those exercising regularly suggests that training increases both stroke volume and average A-V oxygen differences. Conclusion: This finding supports the hypothesis that the cardiovascular system is not normally the most limiting factor in the delivery of oxygen even under the predominant influence of oestrogen in proliferative phase, which is further accentuated by exercise.
Keywords: Cardiovascular adaptability, oestrogen in exercise, obese, Heart rate, Stroke volume.
Pak J Physiol 2017;13(2):44â€“5
2. Pakkala A. Mid career blues in healthcare workers: A physiological approach in ethical management. J Midlife Health 2010;1(1):35â€“7.
3. Frye CA. Steroids, reproductive endocrine function, and affect. A review. Minerva Ginecol 2009;61:541â€“62.
4. Guyton AC, Hall JE, editors. Text Book of Medical Physiology. 11th ed. Missisippi: Saunders; 2006. p. 1061â€“2.
5. Johnson BD, Saupe KW, Dempsey JA. Mechanical constraints on exercise hyperpnea in endurance athletes. J Appl Physiol 1992;73:874â€“86.
6. Dempsey JA, Johnson BD, Saupe KW. Adaptations and limitations in the pulmonary system during exercise. Chest 1990;97:81S-7.
7. Andziulis A, Gocentas A, Jascaniniene N, Jaszczanin J, Juozulynas A, Radzijewska M. Respiratory function dynamics in individuals with increased motor activity during standard exercise testing. Fiziol Zh 2005;51(4):86â€“95.
8. Seaton A, Seaton D, Leitch AG, editors. Crofton and Douglasâ€™s Respiratory Diseases. 5th ed. Oxford: Oxford University Press; 2000. p. 43â€“5.
9. Bonen A, Ling WY, MacIntyre KP, Neil R, McGrail JC, Belcastro AN. Effects of exercise on the serum concentrations of FSH, LH, progesterone, and estradiol. Eur J Appl Physiol Occup Physiol 1979;42:15â€“23.
10. Jurkowski JE, Jones NL, Walker C, Younglai EV, Sutton JR. Ovarian hormonal responses to exercise. J Appl Physiol 1978;44:109â€“14.
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