Keywords : circulatory system
Responses of the Respiratory Ventilation and Certain ECG to the VO2 Percentage in two Aerobic Stresses depending upon Resistance and Speed
Al-Rafidain Journal For Sport Sciences,
2019, Volume 22, Issue 69, Pages 1-46
The pulmonary and electrocardiograph (ECG) variables are from the most interpretative indicators of the cardio-pulmonary system to bump blood and deliver oxygen for active tissues during various stages of a physical stress. So, the importance of this research lies in being acquainted with the magnitude of increasing in minute ventilation (VE) variables, tidal volume (TV) and respiratory rate (RR) in addition to the incremental graduation of heart rate (HR) as indicator of the maximal Oxygen consumption (VO2max), P-R interval, QRS, and S-T interval during various stages of two aerobic stresses gradual incrementally to exhaustion without time limit but one of them depending upon resistance and other upon speed increments in specific stages. Thus, the findings may answer the problem of this study: Does the graduation in these two aerobic stresses differ? And where such as this difference could be utilized in fields such as endurance improving, weight loss, health? Or any field may rise in the range of this research. The research aimed at being acquainted with the Responses of the (VE) in function of (TV) and (RR) and certain ECG of (HR), P-R interval, QRS, and S-T interval to the VO2 Percentage within (subjects) and Between (groups) of two Aerobic Stresses depending upon Speed and Resistance.
The sample included 10 healthy active male students of the physical education college. The sample was chosen intentionally. Variables in question were measured at rest. Then, sample was subjected to two gradual aerobic stress tests requiring the subjects to reach their maximal Vo2. The same variables were measured throughout stages of the stresses stresses. Data were processed statistically by using mixed ANOVA of within subjects repeated measurements and between groups for revealing the responses imposed by stresses and weather the stress type have an effect upon these responses or it is independent of them.
The research concluded that
§ During the last anaerobic high-intensity phases of both aerobic gradual stresses, the VE with its two variables TV and RR could raise remarkably. But there were no effects of the type of stress upon the VE with its two variables TV and RR in these stages
§ During the last anaerobic high-intensity phases of both aerobic gradual stresses, the HR had a little change in addition to a little change throughout both stresses in times of P-R interval, QRS, and S-T interval. But there were no effects of the type of stress upon the HR, times of P-R interval, QRS, and S-T interval.
The research recommended that
a.The aerobic gradual stress depending upon resistance could be adopted to improve the VO2 max within less possible time and utilizing from raise of both TV and RR.
The aerobic gradual stress depending upon speed could be adopted to improve the VO2 max within higher RR.