Table 3.
Spectral power, and normalized transfer function gain in the LF (0.07–0.2 Hz) and VLF (0.02–0.07 Hz) ranges at rest and during low- and moderate-intensity leg cycling in young and older subjects
| LF MAP PSD, mmHg2 | LF MCAVmean PSD, cm2/s2 | LF nGain, db | VLF MAP PSD, mmHg2 | VLF MCAVmean SD, cm2/s2 | VLF nGain, db | |
|---|---|---|---|---|---|---|
| Rest | ||||||
| Young | 3.12±0.56 | 3.02±0.71 | 2.75±0.46 | 4.48±0.63 | 3.18±0.70 | −2.64±1.23 |
| Older | 3.39±0.89 | 2.23±0.52 | 1.80±0.51 | 8.80±1.21 | 4.74±1.32 | −2.82±1.21 |
| Low Ex | ||||||
| Young | 3.34±0.72 | 2.27±0.41 | 0.52±0.58 | 4.05±0.65 | 2.96±0.67 | −3.54±1.65 |
| Older | 3.29±0.90 | 1.85±0.40 | 0.72±0.52 | 5.43±1.15 | 2.33±0.42 | −3.54±0.91 |
| Moderate Ex | ||||||
| Young | 3.26±0.47 | 2.31±0.19 | 0.72±0.68 | 7.00±1.24 | 3.69±0.85 | −3.95±1.34 |
| Older | 3.48±0.87 | 1.85±0.29 | 1.51±0.75 | 8.55±2.10 | 2.52±0.57 | −4.36±1.06 |
| P value | ||||||
| Group | 0.845 | 0.167 | 0.986 | 0.096 | 0.928 | 0.943 |
| Condition | 0.987 | 0.339 | 0.005 | 0.024 | 0.138 | <0.001 |
| Interaction | 0.969 | 0.987 | 0.208 | 0.309 | 0.102 | 0.994 |
Values are means ± SE. LF, low frequency; VLF, very low frequency; PSD, power spectral density; nGain, normalized gain.