Table 2. The effects of caffeine supplementation on measures of blood lactate, heart rate, oxygen uptake, respiratory exchange ratio, and minute ventilation in the final 30 s of a 30 minute recovery period following submaximal incremental exercise.

Values are means ± standard deviations.

Supplement	Blood lactate (mmol·L-1)	Heart rate (b·min-1)	Oxygen uptake (L·min-1)	RER	Minute ventilation (L·min-1)
Caffeine	1.38 ± 0.45	70.8 ± 9.0	0.43 ± 0.07*	0.82 ± 0.05	15.16 ± 2.21*
Placebo	1.27 ± 0.41	72.2 ± 10.5	0.36 ± 0.08	0.80 ± 0.04	13.35 ± 2.62

Note: RER = Respiratory exchange ratio.

* significantly different (p < 0.05) from placebo.