Table 1.
Participant characteristics before and after supplementation in young and older adults
| Placebo | L-citrulline | |||
|---|---|---|---|---|
| Before | After | Before | After | |
| Young (n = 15; 8 women, 7 men) | ||||
| Weight (kg) | 66 ± 3 | 66 ± 3 | 66 ± 3 | 66 ± 3 |
| Body Mass Index (kg/m2) | 23.4 ± 0.6 | 23.3 ± 0.6 | 23.3 ± 0.6 | 23.2 ± 0.6 |
| Seated SBP (mmHg) | 120 ± 2 | 120 ± 3 | 120 ± 2 | 119 ± 2 |
| Seated DBP (mmHg) | 67 ± 2 | 73 ± 2* | 70 ± 2 | 72 ± 3 |
| Resting VO2 (mL/kg/min) | 3.36 ± 0.09 | 3.41 ± 0.14 | 3.55 ± 0.12 | 3.63 ± 0.18 |
| Exercise HR (bpm) | 125 ± 2 | 126 ± 2 | 126.1 ± 2 | 127 ± 2 |
| Cadence (steps per min) | 129 ± 1 | 129 ± 1 | 129 ± 1 | 129 ± 1 |
| Older (n = 11; 7 women, 4 men) | ||||
| Weight (kg) | 67 ± 3 | 66 ± 3 | 67 ± 3 | 67 ± 3 |
| Body Mass Index (kg/m2) | 23.8 ± 0.9 | 23.6 ± 0.9 | 23.7 ± 0.9 | 23.7 ± 0.9 |
| Seated SBP (mmHg) | 129 ± 5 | 127 ± 3 | 130 ± 3 | 129 ± 3 |
| Seated DBP (mmHg) | 73 ± 3 | 74 ± 2 | 75 ± 2 | 77 ± 2 |
| Resting VO2 (mL/kg/min) | 3.04 ± 0.18 | 2.88 ± 0.11 | 3.00 ± 0.13 | 2.90 ± 0.10 |
| Exercise HR (bpm) | 102 ± 1 | 102 ± 1 | 102 ± 1 | 100 ± 1* |
| Cadence (steps per min) | 118 ± 4 | 119 ± 4 | 118 ± 4 | 118 ± 3 |
Values are mean ± SE. SBP, systolic blood pressure; DBP, diastolic blood pressure; HR, heart rate;
*
significant difference (P≤0.05) compared to before within condition.