Table 3.
Means ± standard deviations and RM-ANCOVA statistics (covariate: habitual caffeine consumption) for the comparison of time to exhaustion (TTE), average absolute heart rate (HR), and relative HR (percentage of individual peak HR) for the caffeine (CAF) and placebo condition (PLA) in study 1 (2.5 mg*kg−1 caffeine). Due to technical reasons, HR was statistically evaluated for N = 33.
| CAF | PLA | ANCOVA statistics condition effect |
|
|---|---|---|---|
| TTE [s] | 1154 ± 536 | 1279 ± 853 | F(1,33) = 2.136, p = 0.153, ηp2= 0.061 |
| HR [min−1] | 182 ± 10 | 180 ± 10 | F(1,31) = 2.705, p = 0.110, ηp2= 0.080 |
| Relative HR [%] | 93 ± 3 | 92 ± 4 | F(1,31) = 2.521, p = 0.123, ηp2 = 0.075 |