Table 1. Subject characteristics.

Age (yr)	23.8 ± 1.8
Height (m)	1.73 ± 0.05
Weight (kg)	64.6 ± 6.3
BMI (kg/m2)	21.7 ± 1.3
HR at rest (beats/min)	70.0 ± 11.4
HR at AT (beats/min)	116.2 ± 16.4
VO2 at AT (mL/min)	1,170.2 ± 189.3
VO2/W at AT (mL/min·kg)	18.1 ± 2.3
Salivary α-amylase at rest (kU/L)	22.2 ± 27.5
Salivary α-amylase at Tsa (kU/L)	40.0 ± 18.1
DP at rest (mmHg • beats/min)	8,740.4 ± 1,994.7
DP at DPBP (mmHg • beats/min)	14,868.2 ± 3,153.1

Data presented as mean ± SD. BMI, body mass index; AT, anaerobic threshold; DP, double product; DPBP, double-product breakpoint; HR, heart rate; Tsa, salivary threshold; W, Watt