Considering additional Hours as well as the regression equations, the fresh new estimated amounts of VO

Considering additional Hours as well as the regression equations, the fresh new estimated amounts of VO

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 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.


Acceptance so you’re able to perform the study try taken from the newest Ethics Committee Northern of the Karolinska Institute at Karolinska Medical (Dnr 03–637), Stockholm, Sweden.

Recruitment from professionals.

The process of shopping for users was divided into numerous actions. It become which have advertisements in two major morning push in the Stockholm demanding users. New introduction standards expected coming to the very least two decades dated; living in the brand new Condition out of Stockholm (excluding the new municipality out-of Norrtalje), and you will walking or bicycling right, any point, ranging from house and put regarding really works otherwise studies, and you can definitely commuting for the reason that style at least once per year. Solutions might possibly be sent in prices-totally free by blog post, facsimile, e-post or because of the phone. These adverts resulted in 2148 anybody volunteering to take area.

A questionnaire (The newest Directly Productive Commuting when you look at the Deeper Stockholm Survey step one; PACS Q1, for it within the Swedish and English, select Help suggestions S1 and you can S2 Strategies) was delivered to this type of volunteers; 2010 was came back shortly after about three reminders. The newest questionnaire comprised thirty five concerns, but precisely the inquiries relevant for choosing our society were used in this data. Such incorporated intercourse, many years, exactly how actually demanding its top-notch perform had been, commuting frequencies per week for each and every day of the season and you will travelling duration. The brand new travelling range of each and every individual was also employed for searching for the analysis classification. These were counted with the routes taken in maps from the per respondent (Having station mapping advice, discover Help information S3 and you can S4 Strategies). The method to own calculating this new mapped length try revealed in detail from inside the Schantz and you may Stigell . Regarding solutions out-of PACS Q1, brand new respondents was split up into kinds based on the advertised function from sometimes bicycling or taking walks, or combined methods.

The attempt is chosen from the cyclist classification, we.e. those subjects just who just cycled to operate. Other criteria was basically ages and route distances around the median thinking of one’s male and female cyclists, respectively . People in addition to rated the daily professional jobs since the myself light or extremely light.

Information detailing this new mental knowledge, make sure standardization steps and additionally a health declaration try taken to the riders who fulfilled the conditions (into recommendations thing, find Supporting recommendations S5 and you can S6 Actions. The person pictured within the S5 and S6 Steps has furnished written advised concur (due to the fact outlined within the PLOS concur setting) to publish their picture alongside the manuscript. About missive page, the fresh users was in fact expected whether the in past times removed route was still appropriate, otherwise from an identical length big date-wise (similar recognized as also/minus 5 so you’re able to ten minutes). If that’s the case, they certainly were expected to answer the health declaration and therefore alarmed if they got one: 1) cures and type of infection, 2) tremors, boobs aches or abnormally hefty breathing while in the do so, 3) high blood pressure levels, otherwise cuatro) got recently averted or abandoned take action to own factors out of injury otherwise wellness. The fresh page emphasized the ability to terminate the new screening at any some time and without having to identify an explanation. A signed informed agree off participation is actually came back.

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