Essay - Ventilatory and Gas Exchange Responses to Exercise Summary A. Rationale:...

Ventilatory and gas exchange responses to exercise

Summary a. Rationale: The study seeks ***** investigate the generally accepted relationship between ventilation and the demands of the exercising muscle, in that ventilation is controlled to meet such demands. Increases in ***** ventilation are linked with arterial CO2 pressure maintenance. Particularly, ***** rationale of the study is to focus on existing gaps in scientific knowledge regarding for example the exact role of intrabreath CO2 and H+ oscillati*****s. The hypothesis ***** ***** delivery to the lung is ***** primary stimulus regulating exercise ventilation is also examined, as it h***** not been *****ally sufficiently proven to be generally accepted.

b. Hypothesis: That decreased VCO2 and blood during exercise with reduced ***** glycogen content will not be accompanied by a reduction in ***** VE. O2 delivery to active muscles ***** be compromised by a fall in VE during exercise. If there is no fall in exercise ***** concomitant with the decrease ***** VCO2 and *****, other mechanisms will ***** ***** importance in exercise ventilation.

*****. Purpose: To determine the relationship between exercise VE and VCO2 in the blood as a result of ***** reduction.

*****. Methods: Nine untrained female volunteer subjects were used for the *****, ***** an average age of 25.3 years, and ***** height ***** 166.5 cm, and an average body mass of 61.3kg. Three cycle ergometer tests were performed ***** volitional exhaustion, two of which occurred in ***** normal glycogen state *****d the third in the ***** muscle glycogen state. Each test occurred on 8 o'clock in the morning on three separate days, after an overnight fast. Subjects did not change their diet during the ***** period. All ***** on the oral c*****traceptive pill, with regular menstrual cycles, with tests performed ***** the first six days ***** the follicular phase.

Statistical analysis results are presented as +/- S.D. Intra-class correlation coefficients were determined for VO2peak and GET values. ANOVA was used for the examination of differences at 20, 40, 60, 80, and 100% of VO2peak. Pair-wise comparisons were made with Bonferroni post hoc adjustments. ***** relationship ***** VE and VCO2 for each subject ***** examined by linear regression *****.

e. Results: There was a reduction in average body mass to 60.4 kg when the glycogen-reduction procedure was performed. The body mass difference between NG and RG conditions was estimated ***** be statistically significant.

f. Interpretation: It ***** found that ***** reduction ***** blood, ***** and RER suggests in *****crease in fat oxidation dur*****g exercise in the ***** state. This means a reduction in ***** efficiency at a given intensity. The fall in blood and VCO2 did not work concomitantly ***** a reduction ***** exercise *****.

***** a. Rationale: ***** rationale is clearly *****d in terms of exist*****g knowledge in combination with areas ***** investigation that still need attention. The rationale is fur*****r justified by addressing the specific gaps identified in ***** hypothesis.

b. Hypothesis ***** purpose: The hypothesis and ***** correlate well with the ***** and identified gaps in existing knowledge. Relevant