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Difference in O2-cost (%) between pole lengths of 84% and 88 or 90% of body height as a function of incline and speed. A is data from the present study (n = 10), B and D are from Carlsen et al. (2018) (n = 13), and C is from Losnegard et al. (2017) (n = 9). Data represent mean values and error bars show the 95% CI. All data are from the same lab and rollerskis (including similar friction), but with different subjects participated in the different studies
