Table 4 Heart rate (HR), rating of perceived exertion (RPE), oxygen uptake (VO) and respiratory exchange ratio (RER) during 10 min of self-selected intensity cycling (Phase B). Values are means (±SD, n=10).
|
Time |
Placebo |
Caffeine |
Mean change (%)
± 90% confidence limits |
P |
| HR |
5 min |
159 (17) |
169 (14) |
.59 (.50) |
|
| 10 min |
167 (21) |
178 (10) |
.53 (.49) |
.69 |
| RPE |
5 min |
13 (2) |
13 (2) |
-.06 (.38) |
|
| 10 min |
15 (2) |
14 (2) |
-.14 (.60) |
.79 |
| VO2(mL.kg-1.min-1) |
5 min |
21.74 (3.41) |
23.59 (4.28) |
.54 (.69) |
|
| 10 min |
22.97 (4.43) |
25.22 (4.31) |
.51 (.69) |
.75 |
| RER |
5 min |
.99 (.08) |
1.01 (.09) |
.23 (.59) |
|
| 10 min |
.94 (.05) |
.95 (.06) |
.08 (.63) |
.43 |
P indicates interaction effect of time and trial.
