Linear relations from regression equations, based on values from three submaximal work rates at test and retest, are illustrated as unbroken lines. 2 can be higher, equal or lower at test compared to retest (see broken lines).
Another factor, likely to determine the degree of reproducibility, is the number and span of work rates that are used to establish the HR-VO2 relations. To enable systematic studies of these matters it is therefore important to specify the HR levels used in terms of both absolute levels and percentages of maximal HR as well as the heart rate reserve (HRR) [27,28]. The corresponding levels of VO2 and their percentage of the maximal oxygen uptake are also valuable to state (Fig 1). To our knowledge this has not been done before.
Given this background, the aim of the study was to evaluate day-to-day reproducibility of HR-VO2 regression equations (y-intercept, slope and correlation coefficient) and the estimated oxygen uptakes based on three levels of heart rates representative for everyday cycle commuting. Two HR-VO2 relations were established and compared, one with three levels of submaximal exercise (model 1), and another which also included a maximal exercise (model 2). The HR-VO2 relations were attained on an ergometer cycle in the laboratory for healthy and physically active middle-aged male and female cycle commuters.
Recognition in order to perform the research try obtained from the fresh new Stability Panel Northern of one’s Karolinska Institute on Karolinska Healthcare (Dnr 03–637), Stockholm, Sweden.
Recruitment away from members.
The process of selecting members was split into several strategies. They been that have adverts in two significant morning newspapers within the Stockholm demanding users. This new introduction conditions called for being at least twenty years dated; surviving in brand new Condition off Stockholm (leaving out new local chatki zarejestruj siÄ™ government regarding Norrtalje), and you will walking or cycling the whole way, one range, between home and put of really works otherwise investigation, and you can actively commuting where trend at least one time a-year. Answers is submitted cost-100 % free because of the blog post, fax, e-post or by the cell phone. This type of adverts contributed to 2148 some body volunteering when deciding to take part.
A questionnaire (Brand new Myself Energetic Driving into the Higher Stockholm Questionnaire step 1; PACS Q1, because of it inside Swedish and you may English, discover Support recommendations S1 and S2 Actions) try provided for these volunteers; 2010 was returned immediately after around three reminders. Brand new questionnaire composed 35 questions, however, only the concerns related for choosing the populace were utilized contained in this analysis. This type of included intercourse, years, how truly strenuous its elite efforts was indeed, driving frequencies a week per week of the year and driving duration. New travelling range of every private was also used for trying to find the analysis group. They were counted on the routes consumed in charts by each respondent (To have route mapping guidelines, find Support pointers S3 and you can S4 Strategies). The method to have calculating the new mapped range are demonstrated in detail when you look at the Schantz and you will Stigell . In the responses of PACS Q1, the latest participants was basically split into categories considering the stated setting away from possibly bicycling or strolling, or shared settings.
The take to is picked regarding cyclist category, we.age. men and women sufferers who simply cycled working. Other criteria had been decades and you may station distances near the average thinking of your male and female cyclists, correspondingly . Candidates plus rated its every single day elite operate as the individually light or very light.
Advice explaining the newest psychological studies, ensure that you standardization tips and additionally a medical declaration was sent to the latest riders just who fulfilled the fresh conditions (on advice thing, see Supporting suggestions S5 and you will S6 Tips. The individual envisioned during the S5 and S6 Strategies has provided created told agree (once the intricate inside PLOS agree function) to post their picture together with the manuscript. Regarding the missive letter, the new recipients was in fact requested if or not their in past times pulled route had been good, otherwise regarding an identical length time-smart (similar defined as also/minus 5 to help you ten full minutes). Therefore, these people were asked to resolve medical report which worried whether they got one: 1) medication and type out-of issues, 2) tremors, bust problems or abnormally hefty breathing throughout take action, 3) raised blood pressure, otherwise cuatro) got recently averted otherwise left behind take action to possess reasons out of burns off or health. The brand new page highlighted the legal right to terminate this new evaluation at any some time without having to identify a description. A signed told consent out of participation was returned.