Author ' s response to reviews Title : Construct validity of functional capacity tests in healthy workers

section 4. Comment 4. ICF is not defined in the abstract. We changed it accordingly (Abstract, page 4). 5. Comment 5. Changes should be done according to the different comments and changes performed throughout the manuscript. Thank you for improving our manuscript. Background section 6. Comment 6. “Lower or higher FC may be related to a range of factors such as gender, muscle strength or personal factors”. Please be more specific and include proper references. This sentence was meant as an introduction to the next paragraph. Based on reviewers’ comments we rewrote the background section, whereby the sentence was removed. 7. Comment 7. “Furthermore, more attention should focus on the influence of the test evaluator himself during the test administration as an environmental factor” This sentence is meaningless unless more details regarding the role of the test evaluator are given. We removed the sentence.