ALT Figure of bland-altman analysis for three muscle sites in a cycling graded exercise test (column A) and 8 minute time-trial (column B). Caption reads: "Bland–Altman plots analysis for showing the differences in several muscles of the preferred and nonpreferred limb for the graded exercise test (GXT; column A) and functional threshold power test (8MTT; column B) expressed in SmO 2 variation (%) during the full tests expressed as a percent of total duration for each individual (0%–100%). The central continuous blue line represents the absolute average difference between instruments (Bias) and the upper and lower red lines represent ±1.96 standard deviations (SD)."