Table 2. Effect of caffeine on time to exhaustion, load, heart rate (HR), relative oxygen consumption (VO2), carbon dioxide production (VCO2), expired volume (VE), respiratory rate (RR) and respiratory exchange ratio (RER). Data are means (±SD).
 

Time
(min)

Load
(W)

HR
(bpm)

VO2
(ml·kg-1·min-1)

VCO2
(ml·min-1)

VE
(l·min-1)

RR
(rpm)

RER

Placebo

11.35 (1.45)

328
(24)

184
(5)

38.5
(5.0)

4050
(598)

123.1 (22.3)

47.7 (8.4)

1.46
(.14)

Caffeine

12.08 (1.59)**

336
(24)*

190
(6)**

41.6
(6.5)*

4136
(1183)

136.2 (22.7)*

51.7 (7.4)

1.40 (.13)*
* p< 0.05, ** p< 0.01.