Fig 1.
The effects of caffeine supplementation on blood lactate concentration during submaximal incremental exercise (A); and in recovery from submaximal incremental exercise designed to achieve an end-exercise blood lactate concentration of 4 mmol∙L-1 (B). Values are means; bars are standard deviations. GET = Gas exchange threshold; OBLA = Onset of blood lactate accumulation. † = significant main effect of supplement.
Fig 2.
The effects of caffeine supplementation on heart rate (A) and ratings of perceived exertion (B) during submaximal incremental exercise. Values are means; bars are standard deviations. GET = Gas exchange threshold; OBLA = Onset of blood lactate accumulation. † = significant main effect of supplement; * = significant differences (p < 0.05) at the same exercise intensity.
Fig 3.
The effects of caffeine supplementation on heart rate (A), oxygen uptake (B), respiratory exchange ratio (C), and minute ventilation (D) measured at 5 s intervals during recovery from a bout of submaximal incremental exercise. Values are means.
Table 1.
The effects of caffeine supplementation on resting measures of heart rate, oxygen uptake, respiratory exchange ratio, minute ventilation, and breathing frequency.
Values are means ± standard deviations.
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.
Fig 4.
The effects of caffeine supplementation on oxygen uptake (A), respiratory exchange ratio (B), and minute ventilation (C) during submaximal incremental exercise. Values are means; bars are standard deviations. GET = Gas exchange threshold; OBLA = Onset of blood lactate accumulation.