Table 3 Effect of caffeine or placebo on the total amount of work, mean power and energy expenditure 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 |
Workdone
(J·kg-1) |
5 min |
423 (85) |
470 (95) |
.55 (.52) |
|
| 10 min |
410 (74) |
406 (49) |
-.05 (.67) |
|
| Total |
833 (142) |
876 (109) |
-.06 (.38) |
.19 |
| Mean power (Watts) |
5 min |
86 (29) |
92 (29) |
.19 (.36) |
|
| 10 min |
84 (23) |
90 (28) |
.28 (.45) |
|
| Overall |
85 (25) |
90 (26) |
-.14 (.60) |
.92 |
| Energy |
5 min |
28 (7) |
31 (8) |
.34 (.40) |
|
| (kJ·min-1) |
10 min |
30 (8) |
32 (8) |
.33 (.47) |
|
| Energy (kJ) |
Total |
289 (280) |
314 (302) |
.17 (.50) |
.93 |
P indicates interaction effect of time and trial.
