TABLE 2.

Participant Characteristics (n = 76) Across All Tasks

	Total (n = 76)	Captain (n = 15)	Vice (n = 15)	No. 2 (n = 16)	No. 3 (n = 15)	No. 4 (n = 15)
Age, y	36.5 ± 0.70	37.5 ± 1.73	35.2 ± 1.55	35.4 ± 1.01	36.0 ± 1.16	38.5 ± 2.17
Height, m	1.8 ± 0.01	1.8 ± 0.02	1.8 ± 0.02	1.8 ± 0.02	1.7 ± 0.02	1.8 ± 0.02
Weight, kg	87.5 ± 1.65	90.4 ± 4.29	94.4 ± 3.87	82.8 ± 3.13	83.0 ± 3.74	87.0 ± 2.92
BMI, kg m−2	27.8 ± 0.39	28.7 ± 1.20	29.2 ± 0.88	26.0 ± 0.6	26.8 ± 0.88	28.2 ± 0.53
HRmax* predicted, bpm	182 ± 1	182 ± 1	183 ± 1	183 ± 1	183 ± 1	181 ± 2
Estimated $\dot{\text{V}}{\text{O}}_{2\text{max}}$,† ml min−1 kg−1 (n = 70)	45.4 ± 1	43.6 ± 1.66	44.1 ± 1.21	47.7 ± 0.47	46.4 ± 0.80	44.9 ± 0.83

^*HR_{max predicted} was derived from the equation 208 – age × 0.7.³⁴

^†Highest value from all conditions during the IMRC; derived from Firstbeat Analysis Software via HRV data. BMI, body mass index; HR, heart rate; bpm: beats per minute; HRV, heart rate variability; IMRC, International Mine Rescue Competition; $\dot{\text{V}}{\text{O}}_{2\text{max}}$, the maximum volume of oxygen the person can utilize, measured in millilitres, per minute, per kilogram body weight.