Background
Methods
Participants
Procedures
Familiarization trials
Experimental trials
Exercise protocol
Statistical analysis
Results
Descriptive characteristics
Variable | Mean | Range |
---|---|---|
Age (years) | 23.2 ± 3.1 | 20–29 |
Height (cm) | 177 ± 6 | 163–185 |
Body Mass (kg) | 83 ± 7 | 67–92 |
Relative Bench Press Strength (1-RM/body mass) | 1.4 ± 0.2 | 1.3–1.7 |
Relative Squat Strength (1-RM/body mass) | 1.7 ± 0.2 | 1.4–2.2 |
Habitual Caffeine Intake (mg/day) | 215 ± 72.7 | 100–300 |
Relative Caffeine Intake for Experiments (mg/kg) | 3.6 ± 0.3 | 3.3–4.5 |
Maximal strength (1RM) performance
CAFF300 | TEA300 | COMBO | PLA |
p
| |
---|---|---|---|---|---|
Bench Press 1RM (kg) | 120.0 ± 16.0 | 119.0 ± 16.0 | 120.0 ± 16.0 | 117.0 ± 16.0 | < 0.05 |
Bench Press RTF (# reps) | 12.0 ± 3.0 | 12.0 ± 3.0 | 13.0 ± 3.0 | 12.0 ± 3.0 | 0.72 |
Squat 1RM (kg) | 151.0 ± 24.0 | 149.0 ± 25.0 | 150.0. ± 24.0 | 148.0 ± 21.0 | 0.18 |
Squat RTF (# reps) | 13.0 ± 3.0 | 11.0 ± 3.0 | 12.0. ± 4.0 | 11.0 ± 4.0 | 0.16 |
2 k Row TT (s) | 478.0 ± 35.1 | 479.0 ± 39.6 | 478.6 ± 42.5 | 483.2 ± 45.6 | 0.87 |
Repetitions to failure (RTF) performance
Power/velocity performance
CAFF300 | TEA300 | COMBO | PLA |
p
| |
---|---|---|---|---|---|
Peak Power Bench Press 1 RM (W) | 355 ± 97 | 340 ± 117 | 312 ± 118 | 301 ± 87 | 0.35 |
Peak Velocity Bench 1 RM (m/s) | 0.30 ± 0.10 | 0.29 ± 0.10 | 0.27 ± 0.10 | 0.27 ± 0.10 | 0.45 |
Average Power Bench RTF (W) | 304 ± 47 | 302 ± 55 | 292 ± 51 | 288 ± 50 | 0.05 |
Average Velocity Bench RTF (m/s) | 0.37 ± 0.03 | 0.37 ± 0.04 | 0.35 ± 0.04 | 0.36 ± 0.04 | 0.18 |
Peak Power Squat 1 RM (W) | 1092 ± 272 | 965 ± 333 | 1010 ± 374 | 960 ± 198 | 0.18 |
Peak Velocity Squat 1 RM (m/s) | 0.76 ± 0.20 | 0.67 ± 0.21 | 0.69 ± 0.25 | 0.67 ± 0.14 | 0.14 |
Average Power Squat RTF (W) | 458 ± 92 | 440 ± 79 | 444 ± 79 | 435 ± 75 | 0.19 |
Average Velocity Squat RTF (m/s) | 0.44 ± 0.05 | 0.43 ± 0.04 | 0.43 ± 0.05 | 0.43 ± 0.04 | 0.48 |