Table 3.

Mean core body temperatures as determined with the CORE sensor (first column) and MSR rectal sensor (second column) during the entire Study I, as well as during the corresponding 5-min warm-up and 20-min intervals of steady-state (SS) exercise. In addition, the third column presents the mean bias, the fifth the limits of agreement (LoA), and the sixth the proportion of measurements that were below the pre-defined threshold of 0.3 °C.

Periods of Exercise	CORE [°C]	MSR [°C]	Bias [°C]	p	LoA	≤0.3 °C [%]
entire	38.11 ± 0.48	37.88 ± 0.52	0.23 ± 0.35 *	<0.001	−0.38 to + 0.72	51
Warm-up [0–5 min]	37.23 ± 0.25	37.01 ± 0.18	0.22 ± 0.32 *	0.043	−0.21 to + 0.77	64
SS cycling
Initial 20 min	37.74 ± 0.34	37.40 ± 0.29	0.33 ± 0.33 *	0.012	−0.19 to + 0.80	45
20–40 min	38.29 ± 0.20	38.06 ± 0.23	0.24 ± 0.31 *	0.027	−0.38 to + 0.64	37
Final 20 min	38.51 ± 0.25	38.39 ± 0.21	0.13 ± 0.37	0.266	−0.64 to + 0.56	43

* significantly different mean temperature for CORE and MSR rectal sensor (p < 0.05).