Table 2.
Rest and exercise vascular hemodynamics
| Variable | Saline (Control) | Bout 1 | Bout 2 | Bout 3 | Bout 4 | Bout 5 |
|---|---|---|---|---|---|---|
| Time, min | 5 | 30 | 60 | 120 | 150 | |
| Heart rate, beats/min | ||||||
| Rest | 59 ± 2 | 59 ± 2 | 59 ± 2 | 61 ± 2 | 59 ± 2 | 59 ± 2 |
| Exercise | 63 ± 2 | 62 ± 2 | 63 ± 2 | 62 ± 2 | 64 ± 2 | 65 ± 2 |
| Mean arterial pressure, mmHg | ||||||
| Rest | 93 ± 2 | 92 ± 2 | 95 ± 2 | 97 ± 2 | 96 ± 2 | 96 ± 2 |
| Exercise | 98 ± 2 | 95 ± 2 | 96 ± 2 | 97 ± 2 | 100 ± 2 | 101 ± 2 |
| % FBF from Control | ||||||
| Rest | 716 ± 58 | 676 ± 58 | 574 ± 47 | 615 ± 49 | 669 ± 54 | |
| Δ FBF from Rest, ml·min−1·100 ml FAV−1 | ||||||
| Exercise | 24.9 ± 1.8 | 17.2 ± 1.9 | 23.3 ± 2.0 | 30.4 ± 2.0 | 25.0 ± 1.8 | 22.5 ± 1.9 |
| % FVC from Control | ||||||
| Rest | 710 ± 62 | 593 ± 65 | 526 ± 44 | 574 ± 46 | 675 ± 56 | |
| Δ FVC from rest, ml·min−1·100 mmHg−1·dl FAV−1 | ||||||
| Exercise | 26.3 ± 1.9 | 16.4 ± 2.1 | 25.1 ± 2.1 | 30.7 ± 1.8 | 24.7 ± 1.9 | 20.7 ± 1.8 |
Values are expressed as means ± SE for all nine subjects. *P < 0.05 from control. FBF, forearm blood flow; Percent change was calculated as [(Bout exercise FBF − bout baseline FBF)/bout baseline FBF]·100. FVC, forearm vascular conductance. Percent change was calculated as [(Bout exercise FVC − bout baseline FVC)/bout baseline FVC]·100. Δ FVC from control was calculated as (exercise bout − rest bout). FAV, forearm volume.