Table 1.

Linear mixed model estimates for the natural logarithm of time to exhaustion [95% confidence limits]

Dependent variable	Intensity prescription	Intercept	Intensity coefficient	Inter-individual SD	Inter-individual CV (%)	Standard error of estimate	Inter-individual variability (%)	Residual variability (%)
loge (time to exhaustion)	%$\dot{\text{V}}$O2max	20.1 [18.0–22.6]	– 0.142 [– 0.171 to – 0.120]	0.476 [0.290–0.649]	50.4 [29.6–72.4]	0.321 [0.258–0.369]	68.7 [44.7–82.5]	31.3 [17.0–54.8]
	%Δ	10.4 [9.8–11.0]	– 0.044 [– 0.052 to – 0.037]	0.503 [0.326–0.703]	53.7 [33.5–80.0]	0.335 [0.276–0.401]	69.2 [46.2–82.3]	30.8 [17.5–51.9]
	%$\dot{\text{W}}$max	17.0 [15.1–18.9]	– 0.116 [– 0.138 to – 0.096]	0.422 [0.271–0.576]	44.2 [27.6–62.7]	0.326 [0.259–0.389]	62.6 [37.1–77.1]	37.4 [22.8–59.4]
	%TT	16.6 [14.9–18.3]	– 0.082 [– 0.095 to – 0.067]	0.547 [0.318–0.740]	59.1 [32.6–85.4]	0.326 [0.267–0.385]	73.8 [46.1–85.1]	26.2 [14.8–51.8]
	%W'	8.1 [7.8–8.5]	– 0.017 [– 0.021 to – 0.013]	0.466 [0.265–0.688]	49.2 [27.0–77.8]	0.390 [0.309–0.461]	58.9 [31.4–75.7]	41.1 [22.9–65.7]

Formula: time to exhaustion (s) = 2.718282^{(intercept + intensity coefficient · x%)}, where x = relative intensity. See text for intensity prescription abbreviations