Table 2. HR, BP, and RPP data of men and women before, during, and after 4 h of gaming.
| Variable | Caffeine | AmaTea® | Placebo |
|---|---|---|---|
| HR (bpm) | |||
| Hour 0* | 80±16 | 79±13 | 79±13 |
| Hour 1 | 73±15 | 69±11 | 72±12 |
| Hour 2 | 73±14 | 73±11 | 72±12 |
| Hour 3* | 77±14 | 77±12 | 76±13 |
| Hour 4* | 78±15 | 77±14 | 75±16 |
| SBP (mm Hg) | |||
| Hour 0* | 123±13 | 122±11 | 122±14* |
| Hour 1 | 129±11 | 128±13 | 125±13* |
| Hour 2 | 131±13 | 127±13 | 125±12* |
| Hour 3 | 131±13 | 131±13 | 125±12* |
| Hour 4 | 128±14 | 129±16 | 125±13* |
| DBP (mm Hg) | |||
| Hour 0* | 74±11 | 74±9 | 73±10 |
| Hour 1* | 78±9 | 79±10 | 76±10 |
| Hour 2 | 80±11 | 81±11 | 78±9 |
| Hour 3 | 81±11 | 80±8 | 78±11 |
| Hour 4 | 83±12 | 80±11 | 81±11 |
| RPP | |||
| Hour 0 | 9875±2419 | 9684±1943 | 9582±1907* |
| Hour 1* | 9407±2346 | 8874±1582 | 9053±1878* |
| Hour 2 | 9581±2340 | 9370±1852 | 9013±1747* |
| Hour 3 | 10095±2026 | 10052±1915 | 9513±1759* |
| Hour 4 | 9978±2221 | 9933±2395 | 9444±2318* |
Values are mean±SD. HR: Heart rate, BP: Blood pressure, SBP: Systolic blood pressure, DBP: Diastolic blood pressure, RPP: Rate pressure product. RPP = HR×SBP. HR:
*
Time effect (P<0.0001); h 0 higher than h 1 and 2 (P<0.05) and h 3 and 4 higher than h 1 (P<0.05). SBP: *Condition effect (P = 0.002); Placebo lower than Caffeine and AmaTea® (P<0.05), Time effect (P=0.0001); h 0 lower than all other times (P<0.05). DBP: *Time effect (P<0.0001); h 0 lower than all other times (P<0.05) and h 1 lower than h 4 (P<0.05). RPP: *Condition effect (P=0.04); Placebo lower than Caffeine (P<0.05), Time effect (P=0.005); h 1 lower than h 3 and 4 (P<0.05). No other differences of statistical significance were noted (P>0.05).