The rationale is further justified by addressing the specific gaps identified in the hypothesis. b. Hypothesis and purpose: The hypothesis and purpose correlate well with the rationale and identified gaps in existing knowledge. Relevant alternatives to the hypothesis are identified in the introduction when addressing the issue of CO2 delivery. The purpose and hypothesis of the study are therefore clearly stated.

c. Methods and Design: The method of investigation appears to be valid in terms of the specific method focusing on exercises and measurement techniques. However, in terms of subject choice, there appear to be some limitations. Study results may have been of higher quality had a greater diversity of groups been used for the study. Males and females of various age, weight and activity levels could have been included, for example, with each group investigated separately and the compared. The result would have been a wider diversity of results, and a better interpretation of the exact relationship between VCO2 and VE. While significant results were obtained, I do believe that the wide diversity of humanity will have better been served by a more representative set of research subjects. Important cautionary measures may have been identified, for example, for different weight and age groups when engaging in exercise of various intensity. For the...

This study could then be used as a basis for future investigations with a wider population group.
d. Results: Results were clearly displayed in terms of figures, tables and discussion. A lengthy explanation of tables and figures ensures that all results are presented to the reader in a clear and readable fashion. Although little can be said on the negative side of the results presentation, the document may have benefited from a shorter data description and a lengthier interpretation of results. Nevertheless, as they are, the results are adequately displayed to provide the reader with an accurate picture and to form a basis for the ensuing interpretation.

e. Interpretation: The interpretation appears to correlate well with the data description. As such, it functions well together with the preceding section. A shorter data description might have jeopardized such clarity. The interpretation also appears to support the hypothesis. The above-mentioned limitations of the study also become clear in this section: there is no clear conclusion relating to the functions other than CO2 delivery during exercise. This is not necessarily a negative factor, as it can be used as a basis for future research, investigation, and hypotheses.