Table 3.
Central hemodynamics and ratings of perceived exertion during handgrip exercise
| Liberal Salt | Restricted Salt | |
|---|---|---|
| Heart rate, beats/min | ||
| 15% MVC | 71 ± 14 | 69 ± 15 |
| 30% MVC | 74 ± 12 | 72 ± 15 |
| 45% MVC | 79 ± 13†‡ | 77 ± 15†‡ |
| Stroke volume, mL | ||
| 15% MVC | 115 ± 43 | 116 ± 50 |
| 30% MVC | 120 ± 36 | 119 ± 54 |
| 45% MVC | 117 ± 36 | 114 ± 46 |
| Cardiac output, L/min | ||
| 15% MVC | 8.1 ± 2.5 | 7.7 ± 2.8 |
| 30% MVC | 8.5 ± 2.6 | 8.1 ± 3.4 |
| 45% MVC444 | 9.1 ± 2.8†‡ | 8.3 ± 3.2† |
| Total peripheral resistance, mmHg·mL−1·min | ||
| 15% MVC | 14.5 ± 3.9 | 14.5 ± 3.8 |
| 30% MVC | 14.2 ± 3.6 | 14.3 ± 4.1 |
| 45% MVC | 14.3 ± 3.4 | 14.7 ± 4.1 |
| Rating of perceived exertion, AU | ||
| 15% MVC | 2.7 ± 1.0 | 2.2 ± 0.6 |
| 30% MVC | 5.1 ± 1.4† | 4.5 ± 1.2† |
| 45% MVC | 7.9 ± 2.0†‡ | 7.7 ± 1.6†‡ |
Values are means ± SD; n = 22 (14 men/8 women). A 2 × 3 repeated-measures ANOVA (group, 2 levels: liberal vs. restricted salt) (workload, 3 levels: HG exercise: 15, 30, and 45% MVC) was performed to determine the hemodynamic responses. The Holm-Sidak method was used for α-adjustment and post hoc analysis.
†
P < 0.05, vs. 15%.
‡
P < 0.05, vs. 30%.