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.