Our answers are relative to the ones from McCrory ainsi que al

One reason for the good reproducibility on the group level for model 1, despite only making use of three submaximal work rates, can be the span of the HR attained between work rate 1 and 3 (in average 98–137 and 98–150 for males and females, respectively). It is equally important that the utilized ranges of HR from cycle commuting (in average 113–149 and 118–154 for males and females, respectively) are within, or only slightly above, the range of the HR from the work rates in the laboratory (cf. Tables 3 and 5). If instead VO₂ would be estimated from higher or lower HR than those established in the laboratory, it is possible that greater test-retest differences would be seen (cf. Fig 1).

In the end, the newest tips regarding twenty-four-hr Hour because of the Christensen ainsi que al

A comment on the field heart rates used is that almost half the cyclists were tested in the laboratory at a different time of day compared to their cycle commuting tests. However, McCrory et al. found that within-day variations were not significantly different at the higher activity levels in their study, i.e. normal to fast walking. Thus our population probably had levels of intensity that were high enough to eliminate circadian influences. Another comment favoring a stability in the measurement conditions is that the mean values for the positions of % HR_max used to establish the HR-VO₂ relations related well to the expected VO₂ relative to VO_2max in both sexes .

, and considerably more favourable in relation to using the HR-VO₂ method than those indicated by Christensen et al. . There are several explanations for that. The measurements used by Christensen et al. for establishing HR-VO₂ regression equations were resting and sitting, as well as three low to intermediate exercise rates on an ergometer cycle (8–100 watt) and three exercise rates on a treadmill, thus altogether eight measurement points. For both the slope and the y-intercept of the regression equations, the measurements at low levels of HR are, under those circumstances, more influential. At the same time it is well known that the HR-VO₂ ratios at rest and sitting are quite unstable, resulting in variations in regression equations [11, 25, 41]. ₂ and HR will be higher after a certain HR level, which has been termed “flex HR” [12, 42, 43], which could be another reason for the results of Christensen et al. . Furthermore, they mixed the work forms of cycle ergometer and treadmill as bases for the HR-VO₂ measures, which is in itself problematic, since the HR response for a given VO₂ can differ in these different forms of movement . This creates a greater risk for non-stability in regression equations with repeated measurements. resulted in a mean value of 86 beats per minute. In line with the reasoning in the Introduction (cf. Fig 1) a heart rate close to the endpoint of the spectrum of measurement points forming the regression equation will most probably lead to lower reproducibility. Another potential explanation for their results relates to their use of a heterogeneous sample of predominantly patients and large variations in age, whereas we studied a sample of healthy and physically active middle aged individuals.

That have reported that, one should keep in mind that the fresh new exterior legitimacy of our results in relation to other sorts of users is unsure. Ergo, to help you forward the entire studies within these areas, there clearly was actually a need for subsequent knowledge of them issues.

In addition, we do not know any single thing concerning outside authenticity of your Hour method about laboratory when considering job requirements such as because the edarling through the years commuting. About three studies have tested new concentration of duration commuting having fun with additional Hr measures within the examples of non-typical stage commuters [forty five, 46, 47]. However, none of these studies believed that, having reasons such as for instance cardiovascular float with lengthened really works intervals [a dozen, forty-eight, 49] or stress because of website visitors standards [fifty, 51], the relationship counted about research may vary when staying in a cycle driving ecosystem, and that for that reason the fresh new indicated intensity of stage commuting would be incorrect. This is the main focus within our then education.