Linear relations from regression equations, based on values from three submaximal work rates at test and retest, are illustrated as unbroken lines. dos 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 tinder 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.
Members
Acceptance in order to run the research are extracted from the new Ethics Panel Northern of the Karolinska Institute at the Karolinska Medical (Dnr 03–637), Stockholm, Sweden.
Employment out-of players.
The entire process of shopping for users is actually divided into numerous methods. It already been having ads in 2 big day hit into the Stockholm needing members. The latest addition conditions needed staying at minimum 20 years old; staying in the fresh new State out-of Stockholm (leaving out the new municipality regarding Norrtalje), and walking or bicycling all the way, any range, between domestic and set off work or studies, and you may definitely driving because style at least one time a year. Answers might be submitted costs-100 % free by article, fax, e-post or by the mobile phone. These types of ads led to 2148 anybody volunteering for taking area.
A questionnaire (The fresh new Individually Energetic Commuting into the Better Stockholm Questionnaire step 1; PACS Q1, because of it inside Swedish and you can English, come across Help pointers S1 and you may S2 Methods) is actually provided for this type of volunteers; 2010 were came back once around three reminders. The fresh new survey comprised thirty five inquiries, but only the questions relevant for buying the population were utilized contained in this studies. This type of provided gender, ages, just how directly demanding the elite group work was indeed, commuting frequencies a week for each month of the year and driving years. The latest commuting length of any individual has also been useful for trying to find the research class. They certainly were mentioned toward pathways consumed charts of the each respondent (Getting station mapping guidelines, get a hold of Support advice S3 and S4 Procedures). The process getting calculating the fresh mapped range is actually demonstrated in more detail within the Schantz and you may Stigell . In the responses away from PACS Q1, the brand new respondents had been put into kinds according to its stated setting of often cycling otherwise walking, otherwise combined methods.
Our test was chose from the cyclist class, we.e. the individuals sufferers exactly who simply cycled to your workplace. Almost every other criteria were ages and route ranges near the median opinions of your own female and male cyclists, correspondingly . People including rated its every day elite group operate as physically light or extremely light.
Suggestions outlining the fresh physiological education, ensure that you standardization steps together with a healthcare declaration was sent to the brand new bikers exactly who found new criteria (to the recommendations procedure, find Supporting guidance S5 and you will S6 Methods. The person pictured inside S5 and you can S6 Tips has provided written advised consent (as detail by detail when you look at the PLOS consent mode) to publish his photo together with the manuscript. Regarding the missive page, brand new readers was expected whether or not their previously removed station was still valid, or away from an identical point big date-smart (equivalent defined as including/without 5 to help you ten minutes). In that case, they were expected to resolve the health statement hence concerned whether they got any: 1) cures and kind out-of disease, 2) palpitations, breasts serious pain or abnormally heavy respiration throughout take action, 3) hypertension, or 4) got has just prevented otherwise left behind take action to possess reasons regarding burns otherwise wellness. New letter highlighted the ability to cancel the new screening at any some time without having to identify a description. A finalized told consent out of participation is actually returned.